South African Journal of Animal Science最新文献_第10页

Moringa oleifera leaf meal as a feed supplement for dairy calves 辣木叶粕作为犊牛饲料的补充

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/SAJAS.V51I5.1

T. W. Kekana, U. Marume, C. Muya, F. Nherera-Chokuda

{"title":"Moringa oleifera leaf meal as a feed supplement for dairy calves","authors":"T. W. Kekana, U. Marume, C. Muya, F. Nherera-Chokuda","doi":"10.4314/SAJAS.V51I5.1","DOIUrl":"https://doi.org/10.4314/SAJAS.V51I5.1","url":null,"abstract":"The study evaluated the effects of supplements of Moringa oleifera leaf meal (MOLM) on blood biochemistry and growth of pre-weaned Holstein calves (n = 48). Four-day-old calves were blocked (based on order of birth and birth weight) and randomly allocated to three dietary treatments, namely M0: unsupplemented control, M30: supplemented with 8.33 g MOLM /100 kg bodyweight (BW), and M60: supplemented with 16.66 g MOLM /100 kg BW. The experiment ended when the calves were 42 days old. The MOLM was diluted in the milk of the morning feeding session. Feed intake, faecal score, and body temperature were recorded daily. Bodyweight and body measurements were taken weekly, and blood samples were collected at the same time. Starter dry matter intake (DMI) for the M60 group was higher than for M0 group with a significant week effect. Calves in M60 had higher final bodyweight and body measurements than M0 and M30. Similar trends were observed for superoxide dismutase (SOD), catalase (CAT), and serum antioxidant activity (SAOA). Immunoglobulin G (Ig) levels increased with the age of calves in both M30 and M60 groups, with the increase being progressively larger with the level of MOLM supplementation. Calves in the M60 group had fewer days of diarrhoea. Supplementation of MOLM supplied secondary metabolites and nutrients that improved feed utilization and later stimulated growth, increased enzymatic antioxidants, and reduced diarrhoeal incidence in pre-weaned calves. Dilution of MOLM by as little as 16.66 g/100 kg BW in the milk for dairy calves can be recommended.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"21 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80064982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Interaction of protein supplementation and ecotype on growth performance and carcass traits of Nguni goats 蛋白质补充与生态型对恩古尼山羊生长性能和胴体性状的互作

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.10

D. Ndlovu, M. V. Mkwanazi, M. Chimonyo

{"title":"Interaction of protein supplementation and ecotype on growth performance and carcass traits of Nguni goats","authors":"D. Ndlovu, M. V. Mkwanazi, M. Chimonyo","doi":"10.4314/sajas.v51i6.10","DOIUrl":"https://doi.org/10.4314/sajas.v51i6.10","url":null,"abstract":"Nguni goats are thought not to respond to dietary protein supplementation. The objective of the study was to determine the interaction of protein supplementation and ecotype on growth performance and carcass traits of Nongoma, Msinga and Cedara Nguni goat ecotypes. Thirty-six five-month-old castrated males were randomly allotted to a 3 × 3 factorial design experiment and provided 0, 150 and 300 g protein concentrate per day. There was an interaction of ecotype and protein supplementation on average daily gain (ADG). The ADG of the Nongoma and Cedara goats increased with protein supplementation, but the Msinga ecotype was not affected by the treatments. Goats of the Cedara ecotype weighed 34.4 kg when provided 300 g of supplement, whereas the Nongoma ecotype weighed 26.5 kg at slaughter when unsupplemented. The dressing percentage did not differ with the level of protein supplementation or ecotype. From the fifth quarter, the skin was affected by ecotype, gut fill by protein supplementation and the weight of the head by both factors. The Cedara ecotype had a heavier fifth quarter at 300 g supplementation. There was no interaction of protein supplementation and ecotype on dissectible fat. Intestine and visceral fats were affected by protein supplementation, whereas stomach fat was affected by ecotype.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"26 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81136970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Response of sheep fed urea-treated corncob and supplemented with cassava leaf meal 绵羊饲喂尿素处理玉米芯和添加木薯叶粉的反应

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.2

D. Yulistiani, W. Puastuti, E. Wina

{"title":"Response of sheep fed urea-treated corncob and supplemented with cassava leaf meal","authors":"D. Yulistiani, W. Puastuti, E. Wina","doi":"10.4314/sajas.v51i6.2","DOIUrl":"https://doi.org/10.4314/sajas.v51i6.2","url":null,"abstract":"The objective of this study was to evaluate the effects of feeding untreated or urea-treated ground corncob and supplementing with cassava leaf meal (CLM) in a total mixed ration on growth, feed intake, nutrient digestibility, nitrogen (N) utilization and rumen fermentation of sheep. Five diet treatments with five replications consisted of untreated corncob + concentrate (CC); urea-treated corncob + concentrate (UCC); and CC and UCC supplemented with CLM and designated as CC+CLM and UCC+CLM, respectively. A diet formulated with a mixture of elephant grass and concentrate was used as control (EG). There were no significant differences in dry matter intake (DMI) between treatments. The average DMI was 4.17% bodyweight. Average daily gain (ADG) of sheep fed the treatment diets was between 146.3 and 176.2 g/h/day, and was higher than EG (89.1 g/head/day). Thus, the treatments improved feed conversion ratio (FCR). Nitrogen retention was lowest for EG and highest for UCC and UCC+CLM. The addition of CLM had no effect on growth, feed intake, nutrient digestibility, nitrogen utilization and rumen fermentation characteristics. It was concluded that corncob could be used as a replacement for elephant grass in postweaning diets for sheep.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"18 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82451683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimates of variance components for feedlot traits of the Simmentaler breed in South Africa 南非西门塔尔品种饲养场性状方差成分的估计

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.12

J. Hendriks, F. Neser, J. van Wyk, F. Jordaan, M. M. Scholtz

{"title":"Estimates of variance components for feedlot traits of the Simmentaler breed in South Africa","authors":"J. Hendriks, F. Neser, J. van Wyk, F. Jordaan, M. M. Scholtz","doi":"10.4314/sajas.v51i6.12","DOIUrl":"https://doi.org/10.4314/sajas.v51i6.12","url":null,"abstract":"Breeding of beef cattle is changing, with more emphasis on efficiency of production. Feed cost is the highest expense, and reducing it has the potential to increase profitability. Common measures of efficiency are ratio traits such as feed conversion (feed consumed/weight gain) and feed efficiency (weight gain / feed consumed). Feed conversion ratio is commonly used in South Africa in an attempt to improve feed efficiency. These ratio traits are associated with growth rate. Selection for them would result in higher growth as a correlated response and might also increase the mature size of the cows and their maintenance cost. Thus, alternative efficiency traits such as residual feed intake and residual daily gain have been proposed. In this study, variance components, and genetic parameters for feedlot traits for the South African Simmentaler breed were estimated, with emphasis on the efficiency traits. The focus was to evaluate the use of residual feed intake as an alternative trait. The results indicate non-significant correlations between residual feed intake and body weight and growth traits, implying that residual feed intake should have little effect on the other traits. This is in contrast to the moderate to strong correlations of feed conversion ratio with the same traits. The study demonstrates that considerable genetic variation exists for residual feed intake, which can be exploited. Selection for residual feed intake can reduce the carbon footprint of beef due to the associated lower methane emissions.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"38 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81643383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optimization of response to selection using genomic selection in indigenous chicken breeding programmes 利用基因组选择优化地方鸡育种计划对选择的响应

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.5

C. W. Ndung’u, T. Muasya, T. Okeno

{"title":"Optimization of response to selection using genomic selection in indigenous chicken breeding programmes","authors":"C. W. Ndung’u, T. Muasya, T. Okeno","doi":"10.4314/sajas.v51i6.5","DOIUrl":"https://doi.org/10.4314/sajas.v51i6.5","url":null,"abstract":"This study tested the hypothesis that the use of pooled genetic and phenotypic parameters and genomic selection would optimize selection response in indigenous chicken breeding programmes. This premise was tested with deterministic simulation in three breeding schemes based on the sources of information used to estimate breeding values. These schemes used a conventional breeding scheme with non-pooled parameters (CSN), pooled parameters (CSP), and genomic information in a genomic selection scheme (GSS). A one-tier closed nucleus breeding programme was considered with a mating ratio of 1 to 5 for males to females, Four traits were used in the breeding goal, namely live weight at twelve weeks (LW), egg number for twelve weeks (EN), age at first egg (AFE), and antibody response (Ab). The genetic gain for CSN was 1.5 times higher than that of CSP. The rate of inbreeding for CSN was 19% lower than in CSP. The accuracy of selection followed the same trend with CSN producing 9% higher accuracy of selection than CSP. The GSS scheme resulted in an additional 59.3% genetic gain and 30% accuracy compared with CSP. The GSS scheme also had a reduced rate of inbreeding by 46% compared with CSP. When compared with CSN, GSS produced 38.7% greater genetic gain, a 27% lower rate of inbreeding and 21.0% higher accuracy of selection. Use of pooled parameter estimates and genomic information optimized response to selection, whereas non-pooled inputs overestimated and underestimated rates of genetic gain and inbreeding.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"75 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91395468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxidative stress and effects of dill (Anethum graveolens dhi) powder on the performance and health status of broilers 氧化应激及莳萝粉对肉鸡生产性能和健康状况的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.3

A. Jangali, M. Hedayati, S. Khalaji, M. Manafi

{"title":"Oxidative stress and effects of dill (Anethum graveolens dhi) powder on the performance and health status of broilers","authors":"A. Jangali, M. Hedayati, S. Khalaji, M. Manafi","doi":"10.4314/sajas.v51i6.3","DOIUrl":"https://doi.org/10.4314/sajas.v51i6.3","url":null,"abstract":"Effects of dill powder (Anethum graveolens dhi) on performance and biochemical traits, immune response, blood cells and microbial population of cecum broilers after stress induced with dexamethasone were investigated. Two hundred and forty broilers were arrayed in completely randomized design with six experimental groups, five replications and eight broilers per replication. The experimental groups consisted of G1: control diet without additives, G2: control diet supplemented with 1.5% dill powder, G3: control diet supplemented with 1.5% dill powder under dexamethasone stress, G4: control diet supplemented with 3% dill powder, G5: control diet supplemented with 3% dill powder under dexamethasone stress, and G6: control diet under dexamethasone stress. After 31, 33, 38 and, 40 days, 2 mg/kg bodyweight (BW) dexamethasone was injected in right chest muscle in groups 3, 5, 6, and samples were taken after 35 and 42 days. Use of 3% dill powder reduced cecum microbial population significantly. Under dexamethasone oxidative stress conditions dill powder improved biochemical traits and the number of white blood cells significantly. Without stress induced by dexamethasone injection, use of 3% dill powder improved internal organs, increased the length of the digestive tract, improved weight gain, reduced FCR and improved antibody titers to Newcastle disease (ND) and avian influenza (AI) viruses. All levels of dill powder prevented negative impacts of dexamethasone on functional and biochemical traits. Thus, 3% dill powder has beneficial effects on performance, immune response, blood cell and microbial population, and could be used as a growth promoter and to prevent oxidative stress.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"288 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79408724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Performance and intestinal histology of sheep fed detoxified castor bean meal in sugarcane silage 解毒蓖麻豆粕饲喂甘蔗青贮羊的生产性能和肠道组织学

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.6

P. R. DANTAS JUNIOR, J. S. Oliveira, N. Ribeiro, L. D. Rola, E. G. Silva, A. C. Oliveira, V. Almeida, D. M. L. Lima Júnior, R. Guerra

{"title":"Performance and intestinal histology of sheep fed detoxified castor bean meal in sugarcane silage","authors":"P. R. DANTAS JUNIOR, J. S. Oliveira, N. Ribeiro, L. D. Rola, E. G. Silva, A. C. Oliveira, V. Almeida, D. M. L. Lima Júnior, R. Guerra","doi":"10.4314/sajas.v51i6.6","DOIUrl":"https://doi.org/10.4314/sajas.v51i6.6","url":null,"abstract":"This study evaluated histological changes in the digestive organs and kidneys of sheep fed sugarcane silage augmented with detoxified castor bean meal (CBM). Forty Santa Inês sheep (initial weight 20 ± 0.3 kg) were adapted to the experimental regime for 14 days, after which data were collected for 60 days. The treatments consisted of S0: sugarcane silage (SC); S5: SC augmented with 5% CBM; S10: SC augmented with 10% CBM; S15: SC augmented with 15% CBM; and S20: SC augmented with 20% CBM. After 74 days of confinement, the animals were slaughtered, and then fragments of the liver, rumen, intestine, and kidney were collected for histomorphometric analyses. The intake of dry matter and the average weight gain increased linearly with the level of CBM (P <0.05), as did the rumen absorption area, the height of the papillae and the width of the papillae. The thickness of the keratinized portion of the epithelium was not influenced, Thus, no effect was detected of the anti-nutritional factor of CBM on this organ. In the intestine, CBM increased the height of the villi and the number of goblet cells. However, S20 caused some kidney damage and decreased hepatic glycogen stock, but not sufficiently to reduce performance. Thus, augmentation of sugarcane with CBM, up to 20%, is viable in feeding sheep.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"21 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75345073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sprinkler flow rate affects physiological, behavioural and production responses of Holstein cows during heat stress 喷淋流量影响热应激下荷斯坦奶牛的生理、行为和生产反应

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/SAJAS.V51I5.2

M. Bah, K. Javed, T. Pasha, M. Shahid

{"title":"Sprinkler flow rate affects physiological, behavioural and production responses of Holstein cows during heat stress","authors":"M. Bah, K. Javed, T. Pasha, M. Shahid","doi":"10.4314/SAJAS.V51I5.2","DOIUrl":"https://doi.org/10.4314/SAJAS.V51I5.2","url":null,"abstract":"Holstein Friesian cows are known for their high milk yield. They are popular in the commercial dairy sector of Pakistan. Heat stress is a major challenge for these animals owing to the longer summer season with high ambient temperatures (35 - 40 °C) and relative humidity (30 - 50%) in the area (Butt et al., 2020). Mitigating the effects of heat stress requires substantial investments in energy and water. Spraying dairy cows with water in the holding pen or at the feed bunk is common practice as it lowers body temperature and respiration rate (Kendall et al., 2007; Chen et al., 2013; 2016), and improves feed intake and milk yield (Keister et al., 2002). Owing to the recent decrease in global groundwater, studies have focused on strategies to reduce the use of water to cool dairy cows (Chen et al., 2016). Sprinkler flow rates of 1.3 and 4.9 L/min had similar effects on physiological responses of cows to heat load but produced a 73% difference in water use (Chen et al., 2016). Similarly, Tresoldi et al. (2019) concluded that a sprinkler flow rate of 4.9 L/min had poor efficiency compared with 3.3 L/min, as the additional water did not result in increased biologically relevant cooling. These studies were conducted in Mediterranean climates with an average temperature humidity index in the range of 76 to 78. A recent study with Nili Ravi buffaloes revealed a sprinkler flow rate 1.25 L/min was more efficient than one of 2.0 L/min during subtropical summers (Bah et al., 2021). Because water is projected to be scarce in Pakistan by 2030 (Mustafa et al., 2013), holistic strategies for water conservation in the dairy sector are important nationally. The objective of this study was to evaluate the effects of various sprinkler flow rates on the performance of lactating Holstein Friesian cows in a typical corporate dairy farm setting during the subtropical summer. Performance of these cows was assumed to be similar, irrespective of the sprinkler flow rates.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"9 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78319681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effects of carrot leaves on digestibility of feed, and cholesterol and β-carotene content of egg yolks 胡萝卜叶对饲料消化率及蛋黄胆固醇和β-胡萝卜素含量的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2022-05-09 DOI: 10.4314/sajas.v51i6.11

N. W. Siti, I. Bidura

引用次数: 1

Propolis supplementation affects performance, intestinal morphology, and bacterial population of broiler chickens 添加蜂胶影响肉鸡生产性能、肠道形态和细菌种群

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2021-09-16 DOI: 10.4314/sajas.v51i4.8

S. Sadarman, E. Erwan, A. Irawan, M. Sholikin, R. Solfaine, R. P. Harahap, A. Irawan, A. Sofyan, N. Nahrowi, A. Jayanegara

{"title":"Propolis supplementation affects performance, intestinal morphology, and bacterial population of broiler chickens","authors":"S. Sadarman, E. Erwan, A. Irawan, M. Sholikin, R. Solfaine, R. P. Harahap, A. Irawan, A. Sofyan, N. Nahrowi, A. Jayanegara","doi":"10.4314/sajas.v51i4.8","DOIUrl":"https://doi.org/10.4314/sajas.v51i4.8","url":null,"abstract":"A meta-analysis was conducted to examine the effect of supplementing the diet of broiler chickens with propolis on growth, bacterial population of the intestine, antiviral serum concentration, intestinal morphology, and digestive enzyme activities in broiler chickens. Forty peer-reviewed articles that had been published between 2003 and 2019 were identified using the PRISMA protocol and included in the study. Data were analysed with mixed model methodology, in which the studies were considered random effects, whereas the level of supplemental propolis was considered a fixed effect. Responses to propolis supplementation in bodyweight (BW) and average daily gain (ADG) were quadratic, but average daily feed intake (ADFI) was not affected. Propolis supplementation improved feed conversion ratio (FCR) significantly as a linear function of the level of supplement. The optimum level of supplementation was between 256 and 262 mg/kg feed and produced maximum ADG and final BW. There was a tendency for mortality to decrease because of propolis supplementation. Propolis had no detectable effect on serum antiviral concentration, intestinal bacterial population or intestinal morphology. Among digestive enzymes, only sucrase increased linearly as propolis was increased. Thus, supplementation with propolis increased the growth performance of broiler chickens positively and the effect was dose dependent. This may have been partly because of an improvement in sucrase activity and other factors related to the nutritional content of propolis. Future study to evaluate specific bioactive compounds of propolis is therefore warranted.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":"10 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75737009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2