05 February 2026, Volume 47 Issue 2

    

• Select all
  |

• Select
  Research Progress on Heavy Metal Pollution Characteristics and Removal of the Livestock and Poultry Manure Biogas Slurry

  LIU Zhihang, TIAN Lin, XIANG Tai, ZHANG Yong, XU Rui, BAI Weicai, XU Biao, CHENG Zhengtao, LIANG Chengyue

  Journal Of Domestic Animal Ecology. 2026, 47(2): 1-9. https://doi.org/10.3969/j.issn.1673-1182.2026.02.001

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Biogas slurry of livestock and poultry manure, as a resource for organic fertilizer, contains abundant nutrients; however, it also harbors heavy metal contaminants that pose threats to the ecological environment and human health. This paper provides an in-depth analysis of the composition and characteristics of heavy metals in the biogas slurry of livestock and poultry manure. It systematically reviews the current primary methods for heavy metal removal, including physical, chemical, biological, and combined treatment techniques. Furthermore, the paper presents a forward-looking analysis of the future trends in heavy metal remediation technologies in the biogas slurry of livestock and poultry manure. The aim is to offer insights and reference for the resource utilization and related research of animal manure biogas slurry.
  
• Select
  Early Growth and Development of Meat Sheep and Optimization Analysis of Curve Fitting

  CHENG Yufei, YANG Luming, LU Yihang, YIN Yixin, WU Jiahao, CAO Dawei, HONG Liang, ZHANG Qingfeng

  Journal Of Domestic Animal Ecology. 2026, 47(2): 10-14. https://doi.org/10.3969/j.issn.1673-1182.2026.02.002

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This study aimed to fit the growth curve using the early multi-day age weight information of meat sheep and to investigate the influence of different age-point weight information combination on the fitting accuracy. The findings are intended to guide the timing and frequency of early growth and development traits measurement in meat sheep breeding practices. 138 sheep with similar initial conditions were randomly selected, and the weight information of different age points was collected. Through different age-point combination strategies, the Logistic growth model was used to fit and analyze 1464 combinations of 12 weight information. The coefficient of determination (R²), root mean square error (RMSE) and mean absolute error (MAE) were used to evaluate the evaluation index of the growth curve model. The results showed that the Logistic model could well describe the growth law of meat sheep, with R² above 0.97. The inflection point age of rams and ewes was 29~109 d and 24~104 d, respectively, with a weight of 14.88~44.35 kg and 11.96~28.86 kg, and the maximum daily weight gain was 630~1 240 g·d^-1 and 530~1 230 g·d^-1, respectively. In breeding production practice, at least three weight information points are required for growth curve fitting. With the increase of weight information points, the fitting accuracy increases, and the MAE and RMSE decrease. 3 to 7 weight information points can meet the early fitting needs of meat sheep. For different combinations with the same number of weight information points, the model fitting results are different.
  
• Select
  Screening and Analysis of Differentially Expressed Genes in the Longissimus Dorsi Muscle of Sujiang Pigs Based on Transcriptome Sequencing

  ZHANG Yaqin, GAN Zonghui, QIU Xiao, NI Ligang, XU Pan

  Journal Of Domestic Animal Ecology. 2026, 47(2): 15-22. https://doi.org/10.3969/j.issn.1673-1182.2026.02.003

  Abstract ( ) Download PDF ( ) Knowledge map Save

  To explore the transcriptome differences in the meat quality of Sujiang pigs at different growth stages as well as the related data on differentially expressed genes (DEGs), this study selected three Sujiang pigs each at one month and eight months of age for transcriptome sequencing analysis of their longissimus dorsi muscles. DEGs were identified and subjected to GO functional annotation and KEGG enrichment analysis. A total of 1 493 DEGs were identified, including 674 upregulated and 819 downregulated genes. Enrichment analysis revealed that these DEGs were mainly enriched in biological processes such as cellular processes, biological regulation, and regulation of biological processes. Most of the DEGs were involved in environmental information processing. Key genes identified through various algorithms were MYH3, ADAMTS2, SPARC, COL1A2, COL21A1, and COL2A1, laying a foundation for further research into the molecular mechanisms underlying the meat quality traits of Sujiang pigs.
  
• Select
  Effects of Dietary Net Energy and Lysine Levels on Growth Performance, Carcass Traits and Meat Quality of Growing-finishing Pigs

  FAN Xiaoxiao, YANG Ruohan, YANG Xiuju, DING Xuhong, LIAN Xing, GAO Tangliang, SUN Xiaoqin

  Journal Of Domestic Animal Ecology. 2026, 47(2): 23-31. https://doi.org/10.3969/j.issn.1673-1182.2026.02.004

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This experiment was conducted to investigate the effects of different dietary net energy (NE) and standardized ileal digestible lysine (SID-Lys) levels on the growth performance, carcass traits, and meat quality of growing-finishing pigs, determine the optimal combination for each growth stage, and provide a reference for practical production. A 3×2 two-factor design was adopted, with three NE levels (low: 9.41 MJ/kg, medium: 9.62 MJ/kg, high: 9.83 MJ/kg, fixed throughout the experiment) and two SID-Lys levels (adjusted by growth stage: 1.00%/0.95% for 36~60 kg, 0.95%/0.90% for 60~90 kg, 0.82%/0.78% for 90~120 kg, and 0.81%/0.77% for 120~130 kg). A total of 360 Duroc×Landrace×Yorkshire three-way cross pigs with an initial body weight of 36.86±0.47 kg were randomly assigned to 6 groups, with 4 replicates per group and 15 pigs per replicate, and the experiment lasted for 94 days. The results showed that: (1) Regarding growth performance, high SID-Lys (1.00%) significantly decreased the feed-to-gain ratio in the first stage (36~60 kg, P<0.05); high NE (9.83 MJ/kg) significantly increased the average daily feed intake in the second and third stages (60~120 kg, P<0.05), and significantly improved the average daily gain in the third stage (P<0.05). (2) For carcass traits, NE level significantly affected dressing percentage, carcass straight length, and carcass diagonal length (P<0.05), with the medium NE group having the highest dressing percentage and the high NE group showing the optimal carcass straight length and diagonal length; there was a significant interaction effect between NE and SID-Lys on carcass straight length (P<0.05); neither NE nor SID-Lys had a significant effect on average backfat thickness or skin thickness (P>0.05). (3) In terms of meat quality, NE and SID-Lys had a significant interaction effect on meat color (lightness, redness, yellowness, P<0.05); the medium NE group significantly decreased the muscle pH at 24 h post-slaughter (P<0.05); low SID-Lys significantly increased marbling score and reduced drip loss (P<0.05); neither NE nor SID-Lys had a significant effect on cooking loss or shear force (P>0.05). In conclusion, the recommended dietary combinations of NE and SID-Lys for growing-finishing pigs at each stage are: 36~60 kg (NE 9.41 MJ/kg, SID-Lys 1.00%), 60~90 kg (NE 9.41 MJ/kg, SID-Lys 0.90%), 90~120 kg (NE 9.83 MJ/kg, SID-Lys 0.78%), and 120~130 kg (NE 9.62 MJ/kg, SID-Lys 0.77%), which can balance the optimization of growth performance, carcass development, and meat quality.
• Select
  Effects of Rumen-protected Methionine on Performance,Ruminal Fermentation, Digestibility, and Blood Biochemistry in Cows at Peak Lactation

  ZHOU Linlin, CAO Rongrong, LI Rongrong, XIN Chen, LI Yulong, MI Huwei, ZHANG Rui, WANG Lamei, ZHANG Jun, YAO Junhu, CAO Yangchun

  Journal Of Domestic Animal Ecology. 2026, 47(2): 32-39. https://doi.org/10.3969/j.issn.1673-1182.2026.02.005

  Abstract ( ) Download PDF ( ) Knowledge map Save

  In order to investigate the effects of Rumen-protected methionine (RPM) on performance and total intestinal digestibility of dairy cows at peak lactation, 16 healthy Holstein dairy cows at peak lactation with similar body weight and physiological conditions were randomly divided into two groups. The control group was fed a basal TMR diet daily, and each cow in the RPM group was fed 15 g RPM alone daily in addition to the basal diet. The results showed that: (1) RPM supplementation did not affect body weight, body condition score and dry matter intake (DMI) (P>0.05); (2) There was no significant effect of RPM on milk yield and milk composition (P>0.05); (3) RPM tended to reduce the content of rumen butyric acid (P=0.069). (4) RPM did not affect apparent digestibility (P>0.05); (5) RPM significantly increased the levels of plasma urea nitrogen and carbon dioxide (P>0.05); (6) RPM had no effect on the content of methionine in blood, but the concentration of proline was significantly decreased (P<0.05), and RPM tended to decrease plasma arginine and aspartic acid levels (0.05<P<0.10). In general, RPM supplementation may improve the health status of dairy cows at peak lactation period by improving methionine digestibility, amino acid metabolism and body protein synthesis.
• Select
  Effects of Rumen-protected Lysine on Growth Performance, Serum Biochemical Indices, Slaughter Performance and Meat Quality of Meat Sheep

  ZHAO Zhuo, DAI Rong, YANG Yang, TANG Hong, WANG Liming, ZHANG Yiyuan, XU Mengsi, ZHOU Ping, SUN Guojun

  Journal Of Domestic Animal Ecology. 2026, 47(2): 40-46. https://doi.org/10.3969/j.issn.1673-1182.2026.02.006

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This experiment investigates the effects of rumen-protected lysine (RPLys) on the growth performance, serum biochemical indicators, slaughter performance, and meat quality of meat sheep in order to provide data support for producing high-quality muiton under low-protein dietary conditions. 30 castration sheep of similar weight were selected and randomly divided into two groups, each consisting of three replicates with five sheep per replicate. The experimental group received an additional 60 g/d of rumen-protected lysine (RPLys) on top of a basal diet, with a pre-trial period of 15 days and a trial period of 150 days. After the experiment, eight sheep (four from the experimental group and four from the control group) were slaughtered. The results indicated that, compared with the control group, the experimental group exhibited higher total weight gain and average daily gain (P<0.01), lower levels of serum indirect bilirubin and urea (P<0.01), and significantly higher valine content in muscle tissues (P<0.05). Thus, the addition of RPLys to a low-protein diet improves the growth performance, serum biochemical indicators, slaughter performance, and meat quality of meat sheep, enhancing the efficiency of nitrogen utilization in the feed for meat sheep.
• Select
  Association between Gut Microbiota Structure and Function in Lactating Dams and Their Calves

  Journal Of Domestic Animal Ecology. 2026, 47(2): 47-57. https://doi.org/10.3969/j.issn.1673-1182.2026.02.007

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This study selected eight pairs of healthy lactating Simmental dam-calf pairs to investigate the structural and functional compositions of gut microbiota using high-throughput sequencing of the 16S rRNA gene, functional prediction with PICRUSt2, and bibliometric methods. The aim was to explore the associations of gut microbiota in dam-calf pairs. The results  indicated individual variations in the relative abundance of top 20 potential pathogenic genera included Clostridium and Staphylococcus of Firmicutes phylum, Treponema of Spirocheta, Mycoplasmataceae of Tenericutes, Rickettsiales and Helicobacter of Proteobacteria. The heatmap analysis showed that the dams' Ch1-2 and Ch7-8 clustered with their corresponding calves Du1-2 and Du7-8, forming dam-calf clusters. The dams' Ch3-6 and calves' Du3-6 were grouped as separate maternal and offspring clusters. Clustering analysis of infection pathways for four pathogenic bacteria, including Staphylococcus aureus and Helicobacter pylori, showed that dam-calf pairs Ch1-4 and Du1-4 were categorized as low-risk infection groups, while pairs Ch5-8 and Du5-8 were classified as high-risk infection groups. The infection pathway of Staphylococcus aureus explained 12.98% of the variation in the abundance distribution of Staphylococcus, demonstrating a highly positive correlation (P<0.01), with a correlation coefficient of r=0.881. Furthermore, there was a highly positive correlation (P<0.01) between the abundance of potential pathogenic genera and infection pathways in the dam-calf pairs, with correlation coefficients ranging from r=0.746 to 0.927 and r=1.000 to 1.000. This suggests that the structural and functional compositions of potential dominant pathogenic microbiota in the gut of dam-calf pairs are closely related. In summary,all eight healthy Simmental dam-calf pairs harbored potential pathogens in their gut. Although individual variations existed, the microbiota structure was closely associated with the relative abundance of infection-related pathways, allowing the pairs to be clustered into high-and low-risk groups for infection.
  
• Select
  Probiotic Effects of Bacillus subtilis on Broilers Infected with Staphylococcus aureus and Salmonella

  ZHANG Yaru, LIU Xuechun, XUE Linlin, ZHANG Pengzhen, YANG Xiaojin, FAN Shouwu, LI Wang

  Journal Of Domestic Animal Ecology. 2026, 47(2): 58-63. https://doi.org/10.3969/j.issn.1673-1182.2026.02.008

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This study aimed to investigate the effects of adding bacteriostatic Bacillus subtilis to drinking water on the growth performance, immune organs, immune factors and intestinal health of broilers infected with Staphylococcus aureus or Salmonella. A total of 126 one-day-old Arbor Acres (AA) broilers with similar body condition were randomly divided into 6 groups: Control group, Bacillus subtilis group (BS group), Staphylococcus aureus group (SA group), Bacillus subtilis +Staphylococcus aureus group (BS+SA group), Salmonella group (SE group), Bacillus subtilis+Salmonella group (BS+SE group). There were 3 replicates in each group and 7 chickens in each replicate. The experiment lasted for 21 days. Bacillus subtilis was added in drinking water at a concentration of 1.8 g/L (5×10¹⁰ CFU/g). Staphylococcus aureus (1×10⁸ CFU/mL) and Salmonella (1×10⁸ CFU/mL) were administered orally to induce infection. The results showed that: (1) Bacillus subtilis significantly reduced the ratio of feed to gain of broilers infected with Staphylococcus aureus and salmonella (P<0.05). (2) Bacillus subtilis increased spleen index, bursa of Fabricius index and thymus index of broilers infected with Staphylococcus aureus and salmonella (P>0.05). (3) Except for the IgM levels in the salmonella-infected treatment group, serum levels of IgA, IgG and IgM were increased in the other treatment groups (P>0.05) . (4) Bacillus subtilis significantly increased the ileum to crypto-ratio of broilers infected with Staphylococcus aureus and salmonella (P<0.05). These results suggest that Bacillus subtilis can inhibit pathogenic bacteria, improve production performance and repair intestinal villi in broilers.
• Select
  Physiological and Histological Characterization of the Mammary Gland of 3 to 6 Months Old Dairy Goats

  MA Xueni, WANG Ping

  Journal Of Domestic Animal Ecology. 2026, 47(2): 64-68. https://doi.org/10.3969/j.issn.1673-1182.2026.02.009

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The objective of this study was to elucidate the physiological and histological developmental characteristics of pubertal dairy goats through serum hormone assays and histological section preparation. The serum and mammary gland tissues of 3-month-old and 6-month-old dairy goats were collected, and the serum and mammary gland tissue samples were measured and analyzed by enzyme-linked immunosorbent assay (ELISA) and hematoxylin-eosin staining (HE), respectively. The results showed that, compared with 3-month-old dairy goats, the serum levels of E₂, GH, PROG, PRL, LEP, IGF-1, and ADPN in 6-month-old dairy goats decreased (P<0.05), while the INS level increased (P<0.05). The MT level remained unchanged (P>0.05). Histological observation of HE-stained mammary gland tissues revealed that in 3-month-old dairy goats, the mammary duct lumens were small, presenting a simple tubular structure surrounded by abundant adipocytes and connective tissue, with incomplete lobular differentiation. In contrast, by 6 months of age, the lumens gradually expanded, the ducts extended and thickened with increased branching, and acinar structures appeared. Additionally, the connective tissue significantly decreased, and the interlobular septa became thinner. In conclusion, dairy goats from 3 to 6 months of age showed distinct variation patterns in serum reproductive, metabolic, and adipokine hormones. Concurrently, the structure of the mammary ducts and the development of adipose tissue generally matured, indicating overall developmental progression.
  
• Select
  Improvement and Identification of Isolation and Culture Method of Chicken Primary Testicular Sertoli Cells

  WANG Qiuyue, WANG Yixuan, CHEN Bowen, SUI Jiaying, WU Meihan, SHENG Xihui, WANG Xiangguo, XIAO Longfei, QI Xiaolong, LONG Cheng

  Journal Of Domestic Animal Ecology. 2026, 47(2): 69-74. https://doi.org/10.3969/j.issn.1673-1182.2026.02.010

  Abstract ( ) Download PDF ( ) Knowledge map Save

  To improve the methods for isolating and culturing primary testicular Sertoli cells from chickens, this study utilized the embryonic testis of Jinghong No. 1 chickens at 18 days of incubation, as well as the testis of commercial broilers at 2 and 10 days of age. Sertoli cells were isolated and cultured using two-enzyme-two-step method, three-enzyme-two-step method, and a combined treatment approach. The morphology of the isolated Sertoli cells was observed, and cell viability was calculated to identify the optimal age for chicken testicular tissue. By increasing the enzymatic digestion cycles and employing mechanical treatment in the combined method, the cell viability of Sertoli cells was enhanced, thereby improving the extraction method. Primary Sertoli cells were purified using hypotonic phosphate-buffered saline, and the primary cells were subsequently passaged and identified. The results indicated that the efficiency of Sertoli cell isolation varied with the age of the testicular tissue. The average cell viability of the 10-day-old broiler group was significantly higher than that of the embryo and 2-day-old broiler groups (P<0.05), reaching a maximum of 94.50%. There were significant differences in the isolation efficacy of Sertoli cells at the same developmental stage between the three-enzyme-two-step method and the combined treatment method (P<0.05), with the combined treatment improving cell viability by 5.5%. After hypotonic treatment, spermatogonia attached to Sertoli cells were removed, and immunofluorescence analysis confirmed that the purity of Sertoli cells could reach 98%. Oil Red O staining demonstrated a substantial accumulation of lipid droplets in the cytoplasm of Sertoli cells. This study concludes that the improved combined treatment method for isolating and culturing testicular tissue from 10-day-old broilers, along with hypotonic treatment, yields a high purity of chicken testicular Sertoli cells. The immunofluorescence and Oil Red O identification methods are simple and efficient, making them suitable for the preparation and identification of chicken testicular Sertoli cells.
  
• Select
  Application Effect of Superovulation and Embryo Transfer Technology in Meat Sheep

  WANG Jingjing, LIU Yucheng, GUO Yanhua, NI Jianhong, LIU Changbin, FU Xingwei, WAN Pengcheng

  Journal Of Domestic Animal Ecology. 2026, 47(2): 75-79. https://doi.org/10.3969/j.issn.1673-1182.2026.02.011

  Abstract ( ) Download PDF ( ) Knowledge map Save

  To explore the effect of synchronized estrus, superovulation and embryo transfer in meat sheep, this study compared three different follicle-stimulating hormone (FSH) schemes to induce synchronized estrus and superovulation in 45 white Dorper ewes, and screened the optimal scheme. The superior scheme was then used to superovulate white Dorper, black Dorper and multi-twin Suffolk sheep to investigate the effect of luteal presence or absence on superovulation response and embryo yield in different sheep breeds. Meanwhile, the fertilization rates of natural mating, cervical insemination and laparoscopic insemination were compared, and the fresh and frozen embryos collected from superovulated donors were compared in terms of embryo transfer. The aim was to optimize the insemination and embryo transfer technology system. The results showed that the number of transferable embryos in all three schemes was above 88%. The average number of embryos recovered per ewe in Scheme 2 was significantly higher than that in Scheme 3 (P<0.05), but there was no significant difference in the average number of transferable embryos among the three groups (P>0.05). The number of corpora lutea in white Dorper and multi-twin Suffolk sheep was significantly higher than that in black Dorper sheep (P<0.05), but there was no significant correlation between the number of ovarian corpora lutea and embryo survival rate (P>0.05). The conception rate of laparoscopic insemination was significantly higher than that of natural mating and cervical artificial insemination (P<0.05). The conception rate of fresh embryo transfer (67.93%) was higher than that of frozen embryo transfer (55.65%) (P<0.05). In conclusion, under the experimental conditions of this study, the use of Scheme 2 (total FSH dose of 400 IU, decreasing injection of 40~70 IU per time) for superovulation in meat sheep, combined with laparoscopic fresh embryo transfer technology, can significantly improve the efficiency of embryo transfer.
• Select
  Exogenous Progesterone Suppress Rutting Behavior and Modulates Reproductive Hormone in Male Sika Deer

  DU Peize, HAN Huansheng, ZHAO Lieping, ZHANG Zhen, PENG Xinyu, GAI Guanghui, SUN Liying, ZHANG Yaohui

  Journal Of Domestic Animal Ecology. 2026, 47(2): 80-87. https://doi.org/10.3969/j.issn.1673-1182.2026.02.012

  Abstract ( ) Download PDF ( ) Knowledge map Save

  This experiment aimed to investigate the suppression of rutting behavior in male sika deer during the rutting season by applying exogenous progesterone to regulate reproductive hormone levels, providing a novel method for rut suppression. 12 healthy adult male sika deer were randomly divided into four groups: a control group receiving no progesterone, and experimental groups I, II, and III receiving a single intramuscular injection of 330, 495, and 660 mg/head of exogenous progesterone, respectively. On days 10, 20, 35, and 60 of the trial, rutting behavior was observed and scored, and serum levels of progesterone (P₄), testosterone (T), estradiol (E₂), follicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin (PRL), and gonadotropin-releasing hormone (GnRH) were measured. The results showed that rutting behavior scores in all experimental groups were significantly lower than those in the control group (P<0.01), with 330 mg/head being the optimal progesterone dose. On day 10, P₄ levels in all experimental groups were significantly higher (P<0.01), while T, FSH, and PRL levels were significantly lower (P<0.01) than in the control. GnRH and E₂ levels in groups I and II were highly significantly lower than in the control (P<0.01), with group III showing a significant decrease in GnRH (P<0.05). LH levels in group II were highly significantly lower (P<0.01), and in group I significantly lower (P<0.05), than in the control. On day 20, P₄ levels remained significantly higher (P<0.01), while T, FSH, PRL, and LH levels were significantly lower (P<0.01) in all experimental groups compared to the control. GnRH levels in groups I and II were significantly lower (P<0.01), and E₂ levels in group I were significantly lower (P<0.05). On day 35, P₄ levels were significantly higher (P<0.01), and T, FSH, and PRL levels were significantly lower (P<0.01) in the experimental groups. E₂ levels in group I were significantly lower (P<0.01), while E₂ and LH levels in group II were significantly lower (P<0.05) than in the control. On day 60, P₄ levels in group II were significantly higher (P<0.05), while T, FSH, PRL, and LH levels in all experimental groups were significantly lower (P<0.01). GnRH and E₂ levels in groups I and II were significantly lower (P<0.01). The results indicate that exogenous progesterone applied during the rutting season can effectively suppress rutting behavior in male sika deer, with an optimal dose of 330 mg per head. This suppressive effect is achieved by modulating the levels of reproductive hormones (particularly T), and there is evidence of synergistic interactions among these hormones.
• Select
  The Decoupling Relationship and Driving Factors of Carbon Emissions in China's Animal Husbandry Industry

  CHEN Yuanzhuo, LI Xiandong, ZHANG Yudi, LI Yanfei

  Journal Of Domestic Animal Ecology. 2026, 47(2): 88-96. https://doi.org/10.3969/j.issn.1673-1182.2026.02.013

  Abstract ( ) Download PDF ( ) Knowledge map Save

  To identify the decoupling relationship of the livestock industry and explore emission reduction pathways, this study employs the Tapio decoupling model and the GDIM model to analyze the national and provincial decoupling relationships and driving factors of carbon emissions in China's livestock industry from 2001 to 2021. The results show that: (1) From 2001 to 2021, China's annual carbon emissions from the livestock industry increased from 63 205.23×10⁴ t to 76 484.69×10⁴ t. Feed crop cultivation served as a major carbon source, while the main grain-producing areas and pastoral regions were the core zones of carbon emissions. The carbon intensity of the livestock industry decreased from 0.765 t / thousand yuan to 0.405 t/thousand yuan. (2) Due to the irrational regional division of labor and cooperation system in the livestock industry, a spatial decoupling pattern dominated by weak decoupling, with multiple decoupling states coexisting, has emerged. (3) The growth of feed crop consumption, livestock product output, and livestock product consumption are the key factors driving national carbon emissions in the livestock industry, whereas the decreases in the carbon intensity of feed consumption, livestock production, and product consumption have significantly slowed the growth rate of emissions. The driving factors of provincial livestock carbon emissions are strongly correlated with local conditions; therefore, region-specific and well-targeted low-carbon policies must be formulated based on local endowments.
  
• Select
  Construction and Application of Yak Digital Production Management System Based on SSM

  YI Guang, HE Tengfei, WANG Xilin, LIU Yuhui, ZHU Feng, LI Jiangong, CHEN Zhaohui

  Journal Of Domestic Animal Ecology. 2026, 47(2): 97-104. https://doi.org/10.3969/j.issn.1673-1182.2026.02.014

  Abstract ( ) Download PDF ( ) Knowledge map Save

  To effectively address issues such as information loss, data gaps, low management efficiency, and lack of standardized production processes in yak farming, this study developed a digital production management system for yak based on the “household+farm” management model using the Spring, SpringMVC, and MyBatis (SSM) framework. The system enables data entry, management, statistics, and visualization of key production stages in yak farming. The system is designed with seven modules: yak farm organization management, herd management, breeding management, health management, material management, environmental monitoring, and statistical reports. The system has been tested and applied at the yak breeding base of Da Tong experimental station in Qinghai. Results indicate that the system is user-friendly, stable, and highly scalable, assisting yak farm managers in conducting production management more scientifically and efficiently. It enhances the standardization of yak production management, providing technical support and practical reference for the long-term goal of intelligent yak farming in China.
  
• Select
  Research Progress and Prospects of Hog Prices——Based on CiteSpace Visualisation Analysis

  LI Fei

  Journal Of Domestic Animal Ecology. 2026, 47(2): 105-112. https://doi.org/10.3969/j.issn.1673-1182.2026.02.015

  Abstract ( ) Download PDF ( ) Knowledge map Save

  A bibliometric analysis of current research hotspots and future trends in hog prices can help researchers quickly grasp the knowledge structure and developmental context of the field. This paper uses CiteSpace software to conduct a quantitative analysis of 447 Chinese publications and 109 English publications on hog prices between 2000 and 2024. The results show that (1) Research hotspots in pig prices are concentrated in such areas as the fluctuation patterns of hog prices, transmission mechanism, influencing factors, forecasting and early warning, and their socio-economic impacts. (2) These research hotspots have undergone three stages: exploratory start (2000-2006), rapid development (2007-2017), and maturity and stability (2018 to present). The scope and depth of research continues to expand and deepen. (3) Future research trends will focus on improving the precision and granularity of price predicitons, exploring the regulatory role of futures market, analyzing the joint impact of hog epidemics such as African swine fever and other external shock events on prices, as well as assessing the potential impacts of current production capacity regulation policies and the scaling and capitalization processes of the industry on hog prices. 
  
• Select
  Status of Genetic Resources and Hybrid Effect of Shaannan White Goats

  XI Limeng, ZHANG Pei, ZHOU Bo

  Journal Of Domestic Animal Ecology. 2026, 47(2): 113-117. https://doi.org/10.3969/j.issn.1673-1182.2026.02.016

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Shaannan White Goat is an excellent local goat breed in China, valued for both its meat and skin. The protection and utilization of this excellent germplasm resources is of irreplaceable significance for advancing biological breeding innovation and promoting the healthy and sustainable development of animal husbandry. This paper analyzes the current status of genetic resources of Shaannan White Goat, focusing on variations in growth and development, body size and weight, slaughter performance, meat quality, and reproductive performance. It also summarizes the effects of two-way and three-way crossbreeding with Boer goats, Nanjing Yellow goats, Guanzhong Dairy goats, and Saanen Dairy goats. The results indicate a dramatic decline in the population of Shaannan White Goats, with production performance exhibiting regional differentiation. Using Boer goats as the sire for two-way crossbreeding yielded better results; however, issues such as high dystocia rates and low lamb survival rates were observed. Subsequently, three-way crossbreeding using Guanzhong Dairy goats and Boer goats as sires resulted in significant improvements, with birth weight, weight at 12 months, and average daily gain increasing by 71.43%, 31.18%, and 43.47%, respectively. This represents the most effective crossbreeding combination model currently available.
• Select
  Research Progress on the Application of Branched-chain Amino Acids in Low Protein Diets of Broilers

  ZHANG Lixin, ZHANG Chengyong, MENG Chengming, TAO Jiashu, LIU Yuhan, JING Fanmei, YANG Jingchao

  Journal Of Domestic Animal Ecology. 2026, 47(2): 118-122. https://doi.org/10.3969/j.issn.1673-1182.2026.02.017

  Abstract ( ) Download PDF ( ) Knowledge map Save

  Branched-chain amino acids (BCAAs) play a role in regulating glucose metabolism, protein synthesis, and lipid metabolism. The addition of BCAAs to low-protein diets positively impacts broilers' growth, immune function, and intestinal health. This paper reviews the structure and metabolic processes of BCAAs, their biological functions, and their application in low-protein diets for broilers, aiming to provide a theoretical foundation for the efficient supplementation and utilization of BCAAs in broiler production.
• Select
  Research Progress on Ewe-lamb Integrated Management of Grazing Sheep

  YANG Zhenxiang, ZHANG Linfeng, QIN Rongyan, LIU Yanfeng, LI Lingui, WANG Lele, WANG Yan, CHEN Xiangyu, WANG Wenqi

  Journal Of Domestic Animal Ecology. 2026, 47(2): 123-128. https://doi.org/10.3969/j.issn.1673-1182.2026.02.018

  Abstract ( ) Download PDF ( ) Knowledge map Save

  The ewe-lamb integrated management technology is a systematic approach designed according to the specific physiological stages of ewes and lambs, focusing on their interrelationship. The integrated management technology for grazing ewes and lambs in northern pastoral areas is a comprehensive system that provides scientific nutritional supplementation and regulation at different physiological stages, addressing the issue that natural pasture nutrition cannot fully meet the nutritional needs of grazing ewes and their offspring. This technology offers several advantages, including improving the body condition of overwintering ewes, increasing lambing rates, birth weights, and survival rates, and promoting the growth and development of lambs. This paper mainly reviews the implementation of integrated management technology for grazing ewes and lambs during the winter and spring seasons in northern pastoral regions, as well as its effects at different stages of ewe-lamb development, aiming to provide a reference for further research on the integrated management of grazing ewes and lambs.