Gabriel J Pent, William S Swecker, Benjamin F Tracy
{"title":"匍匐放牧秋天出生的小牛在冬季的年度饲料。","authors":"Gabriel J Pent, William S Swecker, Benjamin F Tracy","doi":"10.1093/tas/txaf075","DOIUrl":null,"url":null,"abstract":"<p><p>Providing calves with access to high-quality forage through creep grazing prior to weaning may help improve calf productivity. In this study of fall-calving herds, the productivity of a rotationally stocked forage system with 10% of the pasture area rotated between winter forages for creep grazing and summer forages (CRP) was compared to the productivity of rotationally (ROT) and continuously (CON) stocked, perennial forage systems. Calves in CRP were provided access to the creep forage 6 to 26 d before weaning and through a 2-wk weaning process. Creep forage nutritive value declined over sampling period. Cows in CON had lower (P = 0.02) hay requirements than cows in CRP. Cow body condition score (BCS) prior to the creep grazing period was greater for CON cows than cows in other systems (P ≤ 0.001). Spring calf body weight (BW) was lowest in ROT compared to calf BW in the other systems (P ≤ 0.008). Calf BW following a 2-wk weaning process was greater (P ≤ 0.002) for CON and CRP calves (246 ± 4 kg) than for ROT calves (226 ± 5 kg), with no difference in calf BW at weaning (P = 1.0) between CON and CRP. Calf average daily gain (ADG; 0.92 ± 0.04 kg day<sup>-1</sup>) from spring pregnancy checks through weaning did not differ between treatments (P ≥ 0.41). While creep grazing systems with cool-season annual forages increased fall-born calf weaning weights compared to rotationally stocked, perennial forage systems, the creep grazing systems required greater hay inputs without weaning weight improvements compared to continuously stocked, perennial forage systems.</p>","PeriodicalId":23272,"journal":{"name":"Translational Animal Science","volume":"9 ","pages":"txaf075"},"PeriodicalIF":1.8000,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12207878/pdf/","citationCount":"0","resultStr":"{\"title\":\"Creep-grazing fall-born calves on winter annual forages.\",\"authors\":\"Gabriel J Pent, William S Swecker, Benjamin F Tracy\",\"doi\":\"10.1093/tas/txaf075\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Providing calves with access to high-quality forage through creep grazing prior to weaning may help improve calf productivity. In this study of fall-calving herds, the productivity of a rotationally stocked forage system with 10% of the pasture area rotated between winter forages for creep grazing and summer forages (CRP) was compared to the productivity of rotationally (ROT) and continuously (CON) stocked, perennial forage systems. Calves in CRP were provided access to the creep forage 6 to 26 d before weaning and through a 2-wk weaning process. Creep forage nutritive value declined over sampling period. Cows in CON had lower (P = 0.02) hay requirements than cows in CRP. Cow body condition score (BCS) prior to the creep grazing period was greater for CON cows than cows in other systems (P ≤ 0.001). Spring calf body weight (BW) was lowest in ROT compared to calf BW in the other systems (P ≤ 0.008). Calf BW following a 2-wk weaning process was greater (P ≤ 0.002) for CON and CRP calves (246 ± 4 kg) than for ROT calves (226 ± 5 kg), with no difference in calf BW at weaning (P = 1.0) between CON and CRP. Calf average daily gain (ADG; 0.92 ± 0.04 kg day<sup>-1</sup>) from spring pregnancy checks through weaning did not differ between treatments (P ≥ 0.41). While creep grazing systems with cool-season annual forages increased fall-born calf weaning weights compared to rotationally stocked, perennial forage systems, the creep grazing systems required greater hay inputs without weaning weight improvements compared to continuously stocked, perennial forage systems.</p>\",\"PeriodicalId\":23272,\"journal\":{\"name\":\"Translational Animal Science\",\"volume\":\"9 \",\"pages\":\"txaf075\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2025-06-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12207878/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Translational Animal Science\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1093/tas/txaf075\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/1/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q3\",\"JCRName\":\"AGRICULTURE, DAIRY & ANIMAL SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Translational Animal Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1093/tas/txaf075","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/1 0:00:00","PubModel":"eCollection","JCR":"Q3","JCRName":"AGRICULTURE, DAIRY & ANIMAL SCIENCE","Score":null,"Total":0}
Creep-grazing fall-born calves on winter annual forages.
Providing calves with access to high-quality forage through creep grazing prior to weaning may help improve calf productivity. In this study of fall-calving herds, the productivity of a rotationally stocked forage system with 10% of the pasture area rotated between winter forages for creep grazing and summer forages (CRP) was compared to the productivity of rotationally (ROT) and continuously (CON) stocked, perennial forage systems. Calves in CRP were provided access to the creep forage 6 to 26 d before weaning and through a 2-wk weaning process. Creep forage nutritive value declined over sampling period. Cows in CON had lower (P = 0.02) hay requirements than cows in CRP. Cow body condition score (BCS) prior to the creep grazing period was greater for CON cows than cows in other systems (P ≤ 0.001). Spring calf body weight (BW) was lowest in ROT compared to calf BW in the other systems (P ≤ 0.008). Calf BW following a 2-wk weaning process was greater (P ≤ 0.002) for CON and CRP calves (246 ± 4 kg) than for ROT calves (226 ± 5 kg), with no difference in calf BW at weaning (P = 1.0) between CON and CRP. Calf average daily gain (ADG; 0.92 ± 0.04 kg day-1) from spring pregnancy checks through weaning did not differ between treatments (P ≥ 0.41). While creep grazing systems with cool-season annual forages increased fall-born calf weaning weights compared to rotationally stocked, perennial forage systems, the creep grazing systems required greater hay inputs without weaning weight improvements compared to continuously stocked, perennial forage systems.
期刊介绍:
Translational Animal Science (TAS) is the first open access-open review animal science journal, encompassing a broad scope of research topics in animal science. TAS focuses on translating basic science to innovation, and validation of these innovations by various segments of the allied animal industry. Readers of TAS will typically represent education, industry, and government, including research, teaching, administration, extension, management, quality assurance, product development, and technical services. Those interested in TAS typically include animal breeders, economists, embryologists, engineers, food scientists, geneticists, microbiologists, nutritionists, veterinarians, physiologists, processors, public health professionals, and others with an interest in animal production and applied aspects of animal sciences.