Author : Juan M. Piñeiro
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (964 download)
Book Synopsis Effect of Postpartum Uterine Diseases on Milk Yield, Milk Components, and Reproduction in Lactating Dairy Cows Under Certified Organic Management by : Juan M. Piñeiro
Download or read book Effect of Postpartum Uterine Diseases on Milk Yield, Milk Components, and Reproduction in Lactating Dairy Cows Under Certified Organic Management written by Juan M. Piñeiro and published by . This book was released on 2016 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of the present study was to assess the effect of postpartum uterine diseases on milk yield (kg/day), and milk components (percent fat and protein, and SCC). Lactating cows (n = 3,217) from 2 dairy herds were screened for retained placenta (RP; >24 hours after parturition), metritis (MET) within 20 days in milk (DIM), and clinical endometritis (CE) at 26 ± 3 DIM. Milk yield and components from the DHIA test-days up to 305 DIM and reproductive performance at first service were collected. Weekly, a list of cows was obtained using on-farm computer records screened for RP, MET, and CE. Parity (lactations 1, 2 and =3) of cows was accounted for milk yield, milk components, and reproduction. The statistical analyses were performed using MIXED (milk yield and components), GLIMMIX (risk factors associated with uterine diseases and reproduction), and CORR (correlation of risk factors with uterine diseases) procedures of SAS. Cows diagnosed with MET or CE had a negative effect on milk yield, increased milk fat percentage and SCC, and reduced reproductive performance at first service. Regardless of parity, lactating cows diagnosed with MET and CE had significantly reduced milk yield (by 2 to 3 kg/cow/day) for at least one of the first 4 DHIA tests (P