Animal Production Science最新文献

{"title":"Wagyu Feeder Check: A genomic-based tool to identify performance differences of Australian Wagyu and Wagyu crossed cattle","authors":"Antonio Reverter, Yutao Li, Pâmela A. Alexandre, Sonja Dominik, Carel Teseling, Aaron van den Heuvel, Karen Schutt, Matt McDonagh, Laercio Porto-Neto","doi":"10.1071/an23246","DOIUrl":"https://doi.org/10.1071/an23246","url":null,"abstract":"<strong> Context</strong><p>Wagyu Feeder Check is a genomic-based tool designed to provide genomic estimated breeding values (GEBV) for five feedlot growth and carcase traits. At present, Wagyu Feeder Check is based on a reference population of 8316 genotyped and phenotyped Australian fullblood (FB; <i>N</i> = 2120) Wagyu and Wagyu-crossed (XB; <i>N</i> = 6196) cattle, principally Wagyu × Angus F1 animals.</p><strong> Aims</strong><p>We provide technical details behind the development of the Wagyu Feeder Check and validate the ability of its GEBV to predict differences in performance of Wagyu cattle in daily weight gain at feedlot, carcase weight, carcase eye muscle area, carcase marbling score and carcase rump fat at the P8 site.</p><strong> Methods</strong><p>Data supplied from eight commercial supply chains across Australia was used to generate GEBV using mixed-model equations that incorporated a genomic relationship matrix build with 82 504 autosomal markers. The bias, dispersion, and accuracy of the GEBV were evaluated using a four-way cross-validation scheme where, in each turn, the phenotypes from a random 1549 (or 25%) XB cattle were set as missing.</p><strong> Key results</strong><p>The genomic estimate of the Wagyu content in the FB and XB population averaged 99.12% and 59.55%, respectively, and with most of the non-Wagyu content associated with Angus. The estimates of heritability (± s.e.) were 0.497 ± 0.016, 0.474 ± 0.004, 0.347 ± 0.014, 0.429 ± 0.003 and 0.422 ± 0.003 for daily weight gain at feedlot, carcase weight, eye muscle area, marbling and rump fat, respectively. Averaged across the four XB validation populations, the accuracy of GEBV was 0.624, 0.634, 0.385, 0.620, and 0.526 for the same set of traits.</p><strong> Conclusions</strong><p>Genomic predictions generated by Wagyu Feeder Check can predict differences in feedlot and carcase performance of Australian Wagyu cattle. Given the large content of Angus in the XB population, further research is required to determine the predictive ability of GEBV in Wagyu × <i>Bos indicus</i> and Wagyu × dairy animals.</p><strong> Implications</strong><p>Commercial feedlot operators finishing animals with a strong Wagyu breed component will benefit from using Wagyu Feeder Check for decision making.</p>","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"23 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138538174","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}

{"title":"Net greenhouse-gas emissions and reduction opportunities in the Western Australian beef industry","authors":"Stephen Wiedemann, Emma Longworth, Riley O’Shannessy","doi":"10.1071/an23111","DOIUrl":"https://doi.org/10.1071/an23111","url":null,"abstract":"<strong> Context</strong><p>The Western Australian (WA) Government has set ambitious emission reduction targets and is developing strategies to reduce emissions across the state economy, including agriculture.</p><strong> Aims</strong><p>This study determined the product carbon footprint (CF) and total emissions of the WA beef industry, to establish a baseline for emission reduction planning.</p><strong> Methods</strong><p>A cradle-to-gate attributional life-cycle assessment with a reconciled livestock inventory of herd numbers and turnoff, was used. Emission reduction strategies were examined and included herd management, enteric-methane mitigation, and removals via carbon sequestration in vegetation and soils.</p><strong> Key results</strong><p>Modelled livestock numbers were found to be 36% higher than reported in the Australian Bureau of Statistics (ABS), resulting in an emission profile of 4.7 million tonnes (Mt) of carbon dioxide equivalent (CO₂-e) (excluding land use (LU) and direct LU change (dLUC)). This profile was 26% higher than emissions reported in state inventories. LU and dLUC were estimated to be a greenhouse-gas removal of −2.6 Mt CO₂-e, although with high uncertainty. The mean CF for WA was 15.3 kg CO₂-e per kg liveweight (LW) (excluding LU and dLUC). State-wide removals from LU and dLUC were estimated to be −8.5 kg CO₂-e/kg LW. The CF was 11.7, 19.2 and 18.2 kg CO₂-e/kg LW for the Agricultural, Kimberley and Arid regions respectively. The implementation of herd-management strategies and anti-methanogenic supplements resulted in a maximum 25% reduction.</p><strong> Conclusions</strong><p>Herd productivity and market specifications were key drivers of regional differences in CF. Opportunities exist to reduce the CF in northern herds through diverting cattle to Australian backgrounding and feedlot supply chains to reach slaughter weight at a younger age. Adoption of anti-methanogenic feed supplements were important; however, achieving major reductions in the next decade will rely on removals via carbon sequestration in soil and vegetation.</p><strong> Implications</strong><p>Considering the magnitude of removals and elevated uncertainty in this result, further research and new datasets are needed to refine this analysis. New datasets are required to accurately report livestock numbers and track and reduce future GHG emissions from this higher baseline. Technical, cost and adoption barriers will need to be addressed by developing actionable pathways to achieve emission reduction in the mid- to long term.</p>","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"27 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138538176","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}

{"title":"Extended abstracts","authors":"","doi":"10.1071/anv63n16abs","DOIUrl":"https://doi.org/10.1071/anv63n16abs","url":null,"abstract":"","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":" 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135243753","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}

{"title":"A brief history of the International Deer Biology Congress","authors":"László I. Sugár, Jo Anne M. Smith-Flueck, Gordon McL. Dryden","doi":"10.1071/an23311","DOIUrl":"https://doi.org/10.1071/an23311","url":null,"abstract":"The quadrennial International Deer Biology Congresses reflect the world-wide interest in the ecology, biology, and conservation biology of deer and use of cervine products. The origins and development of the International Deer Biology Congress are described in this article.","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136105884","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}

{"title":"Valerius Geist: a global leader in deer biology and conservation","authors":"Jo Anne M. Smith-Flueck, Stefano Mattioli","doi":"10.1071/an23296","DOIUrl":"https://doi.org/10.1071/an23296","url":null,"abstract":"Professor Valerius Geist was a world-renowned deer biologist who made important contributions to deer science, especially in the areas of animal behaviour, the evolution of cervids in the Pleistocene, and deer conservation. One of his greatest accomplishments was to define the core principles that have made wildlife management unique in North America. The deer science community deeply regrets his passing in 2021.","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136376116","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}

{"title":"&lt;i&gt;Corrigendum to&lt;/i&gt;: Effects of supplementation with different concentrations of L-citrulline on the plasma amino acid concentration, reproductive hormone concentrations, antioxidant capacity, and reproductive performance of Hu ewes","authors":"Yan Ma, Guodong Zhao, Caidie Wang, Min An, Chen Ma, Zhiqiang Liu, Jianguo Wang, Kailun Yang","doi":"10.1071/an22290_co","DOIUrl":"https://doi.org/10.1071/an22290_co","url":null,"abstract":"<sec> Context <sc>L</sc>-citrulline (<sc>L</sc>-Cit) does not degrade in the rumen and has the ability to form peptide bonds in the body; however, it does not participate in protein synthesis. </sec> <sec> Aims This study aimed to evaluate the effects of <sc>L</sc>-Cit on the reproductive performance of Hu ewes. </sec> <sec> Methods In total, 30 ewes were randomly categorised into five groups. The control group was fed with a basic diet, whereas the Experimental Groups I, II, III, and IV were provided feed supplemented with 5, 10, 15, and 20g/day of <sc>L</sc>-Cit respectively. Blood samples of ewes were collected 4h after feeding on Day 21 of the experiment and before feeding on Day 30. The optimal supplementary feeding dose was selected on the basis of blood biochemical indexes. Overall, ninety 2-year-old ewes were classified into two groups. The control group was fed with a basic diet and the experimental group was fed with a diet supplemented with 10g/day of <sc>L</sc>-Cit. After 30days of supplementary feeding, reproductive performance of ewes was determined. </sec> <sec> Key results The plasma concentrations of Cit, ornithine, and arginine in ewes increased linearly with an increase in the level of <sc>L</sc>-Cit supplementation. The plasma concentrations of gonadotropin-releasing hormone, luteinising hormone, and follicle-stimulating hormone in the experimental group increased significantly compared with those in the control group. The plasma total antioxidant capacity and catalase, superoxide dismutase, and glutathione peroxidase in the experimental group were significantly higher than those in the control group, whereas the concentrations of malondialdehyde in all experimental groups were significantly lower than those in the control group. The conception, lambing, and double lambing rates of the experimental group were increased by 28.76%, 15.90%, and 40.21% respectively. </sec> <sec> Conclusions Supplementation with different doses of <sc>L</sc>-Cit can improve the concentrations of some plasma amino acids and reproductive hormones as well as antioxidant capacity of ewes. Supplementary feeding with 10g/day of <sc>L</sc>-Cit could increase the lambing and double lambing rates of ewes. </sec> <sec> Implication <sc>L</sc>-Cit can improve the reproductive performance of ewes. </sec>","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"195 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135138897","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}

{"title":"&lt;i&gt;Corrigendum to&lt;/i&gt;: Environmental impacts of the Australian poultry industry. 1. Chicken meat production","authors":"M. A. Copley, S. G. Wiedemann","doi":"10.1071/an22230_co","DOIUrl":"https://doi.org/10.1071/an22230_co","url":null,"abstract":"<sec> Context Steadily increasing consumption of chicken meat (Australia&amp;#x2019;s most consumed meat protein) has resulted in expanded production. With societal expectations that industries improve sustainability, understanding baseline impacts is vital. </sec> <sec> Aims This study determined carbon footprint (kg CO₂-e), fossil energy (MJ), fresh water consumption (L), stress (LH₂O-e) and scarcity (m³), and land-occupation (m²) impacts for conventional (C) and free-range (FR) production systems, identified hotspots and the implications of changes in production over the past decade, to establish targets for future improvement. </sec> <sec> Methods In the largest study of its kind, attributional life-cycle assessment with data collected for &amp;#x223c;50% of birds processed was used, reporting impacts per kilogram of the typical market mix of chicken products, and boneless chicken. Uncertainty was assessed through Monte Carlo analysis, and results are presented as the means and standard deviation. </sec> <sec> Key results Slightly lower impacts per kilogram of chicken meat product were observed for C production (2.1&amp;#xb1;0.03kgCO₂-e, 18.0&amp;#xb1;0.3MJ, 178.6&amp;#xb1;22.4L, and 10.2&amp;#xb1;0.1m²) than for FR (2.2&amp;#xb1;0.03kgCO₂-e, 18.5&amp;#xb1;0.3MJ, 189.6&amp;#xb1;24.6L, and 10.6&amp;#xb1;0.1m²). Feed production was the major hotspot, followed by grow-out and meat processing. Land use (LU) and direct land use-change (dLUC) impacts associated with imported soymeal added 1.7&amp;#xb1;0.3 and 1.8&amp;#xb1;0.3kgCO₂-e to C and FR respectively. FR carbon footprint and land occupation were significantly (<i>P</i><0.05) higher. Since 2010, fossil energy, arable land, and greenhouse-gas emissions have declined. One countertrend was LU and dLUC emissions, which increased due to changed soy imports, resulting in a slightly higher C carbon footprint. </sec> <sec> Conclusions Multi-indicator analysis is fundamental to understanding, communicating, and improving performance, and distinguishing between short-term fluctuations and long-term trends. Since 2010, feed-production impacts have increased (due to imported soymeal in poultry diets), indicating that alternative feed protein sources are a priority. Efficiency improvements reduced per-kilogram impacts across other indicators, demonstrating a positive trend in producing more food from fewer inputs. </sec> <sec> Implications Australian chicken meat is a low-impact animal protein. Future improvements require alternative feed proteins, technology adoption and practice change to maintain or reduce impacts as production expands alongside consumer demand. </sec>","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"437 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136338940","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}

{"title":"Effects of different rearing systems on growth performance, carcass traits, meat quality and serum biochemical parameters in Gaoyou ducks","authors":"Zhicheng Wang, Chunhong Zhu, Hongxiang Liu, Weitao Song, Zhiyun Tao, Wenjuan Xu, Shuangjie Zhang, Huifang Li","doi":"10.1071/an22309","DOIUrl":"https://doi.org/10.1071/an22309","url":null,"abstract":"Context The rearing system is a critical non-genetic factor that can considerably affect poultry production. Aims This study examined the effects of floor rearing systems (FRS), net rearing systems and cage rearing systems (CRS) on growth performance, carcass traits, meat quality and serum biochemical parameters of Gaoyou ducks. Methods A total of 450 healthy 22-day-old male Gaoyou ducks with similar average bodyweight were randomly divided into the FRS, net rearing systems and CRS groups. The experiment lasted from 22 to 84 days of age. Key results CRS ducks had a higher final bodyweight, average daily feed intake and average daily gain, and a lower feed-to-gain ratio P < 0.05). FRS ducks had higher breast and gizzard yields and shear force, and lower drip loss and abdominal fat content (P < 0.05). Moreover, FRS ducks had significantly lower glucose, total protein and triglyceride, and higher high-density lipoprotein cholesterol levels (P < 0.05). Conclusions CRS was beneficial to the growth performance of Gaoyou ducks, whereas FRS was beneficial to carcass traits, meat quality and some serum biochemical parameters. Implications The results indicated that the CRS and FRS had their own advantages. Thus, an appropriate rearing system should be selected according to the production target and market demand.","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"282 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135035690","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}

{"title":"&lt;i&gt;Corrigendum to&lt;/i&gt;: Production and performance of commercial beef breeding females in northern Australia. 4. Factors influencing the occurrence of lactating cows becoming pregnant within 4 months of calving","authors":"K. D. McCosker, N. R. Perkins, G. Fordyce, P. K. O’Rourke, M. R. McGowan","doi":"10.1071/an17502_co","DOIUrl":"https://doi.org/10.1071/an17502_co","url":null,"abstract":"<sec> Context Sound reproductive efficiency is a key determinant for the overall productivity of a beef breeding business. For beef breeding herds to obtain high levels of reproductive productivity, breeding females need to efficiently become pregnant while lactating. </sec> <sec> Aims This study aimed to determine and quantify the major factors associated with lactating cows becoming pregnant within 4months of calving (P4M) in commercial beef breeding herds of northern Australia. </sec> <sec> Methods A prospective epidemiological study was conducted using 78 commercial northern Australian beef breeding herds and involved 78&amp;#x2009;000 cattle that were monitored for 3&amp;#x2013;4years. A multivariable model-building process was employed to scrutinise the resulting dataset to identify what herd-management practices, and nutritional, environmental and individual cow factors were major determinants of lactating cows becoming pregnant within 4months of calving (P4M) and to estimate their magnitudes of effect. </sec> <sec> Key results Overall, 41.6% of cows per production year were successful for P4M. Country type was strongly associated with 65.4%, 57.5%, 61.8% and 16.4% P4M for the Southern Forest, Central Forest, Northern Downs, and Northern Forest respectively. Between-year variability ranged between 3.3 and 11.7 percentage points. Cows calving in December&amp;#x2013;January (61%) had a substantially higher occurrence of P4M than did cows calving between July and September (15%). The difference in P4M when comparing availability of wet-season pasture protein and phosphorus was 12.7 and 20.3 percentage points respectively. Modelling of the impact of group seroprevalence and management group prevalence of recent infection with several infectious diseases was estimated, with a large negative association between group bovine viral diarrhoea seroprevalence and P4M suggested. </sec> <sec> Conclusions This study further demonstrated the substantial impact that environment, herd management practices, nutrition and disease factors can have on the reproductive performance of females. </sec> <sec> Implications To optimise the performance of females (through increasing the occurrence of cows contributing calves in consecutive years) under commercial conditions in northern Australia, herd managers should focus on maximising the proportion of cows within a herd calving at the desired time of the year, ensuring that any nutritional deficiencies and herd health issues are managed, and that cows are managed such that they are of good body condition score at the time of calving. </sec>","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135384258","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}

{"title":"Improving growth rates of Ongole crossbred bulls by formulation and level of supplement of by-products","authors":"None Gunawan, E. Winarti, A. Sofyan, A. D. Putridinanti, S. Andarwati, C. T. Noviandi, A. Agus, K. J. Harper, D. P. Poppi","doi":"10.1071/an23229","DOIUrl":"https://doi.org/10.1071/an23229","url":null,"abstract":"Context Formulating diets using agro-industrial by-product concentrates to increase the growth performance and cost efficiency of Ongole crossbred bulls.Aims This study was conducted to evaluate the inclusion of agro-industrial by-products of dried cassava powder (DCP), mixed copra meal (CM), palm kernel cake (PKC) and soybean hull (SBH) into rations at low and high levels of feeding on bull liveweight gain and farmer profitability.Methods Fifty Ongole crossbred bulls with an initial bodyweight (BW) of 227±66.5kg and aged between 12 and 18months, were arranged in a randomised complete-block design of five treatments, with 10 heads per treatment. The control group (T0) was provided the current feeding system (CFS) fed ad libitum. The supplemented treatments consisted of CFS ad libitum+concentrate (50% DCP, 25% CM, 25% PKC) at 1% BW/day (T1), CFS ad libitum+concentrate (50% DCP, 25% CM, 25% SBH) at 1% BW/day (T2), CFS ad libitum+concentrate (50% DCP, 25% CM, 25% PKC) at 2% BW/day (T3), CFS ad libitum+concentrate (50% DCP, 25% CM, 25% SBH) at 2% BW/day (T4). The experiment was conducted for 12weeks.Key results The BW gain over 12weeks (kg) for T0, T1, T2, T3 and T4 was 39.5, 56.2, 68.9, 57.5 and 62.1kg respectively. The income over feed cost was significantly higher in T2.Conclusions Supplementation with by-products increased bull liveweight gain compared with current feeding practices. A concentrate supplementation of DCP mixed with CM and SBH at 1% BW/day was the most effective and profitable supplementation method to increase income of farmers in this district and there was no advantage of increasing the level of supplement.Implications A combination of DCP, CM and SBH to form a concentrate supplement and fed at 1% BW/day will increase bull liveweight gain and income of farmers.","PeriodicalId":7895,"journal":{"name":"Animal Production Science","volume":"251 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135564105","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}