Stage of Lactation as a Criterion for Switching Cows from One Complete Feed to Another during Early Lactation
نویسندگان
چکیده
منابع مشابه
Liver fat content and lipid metabolism in dairy cows during early lactation and during a mid-lactation feed restriction.
During the transition period, the lipid metabolism of dairy cows is markedly affected by energy status. Fatty liver is one of the main health disorders after parturition. The aim of this study was to evaluate the effects of a negative energy balance (NEB) at 2 stages in lactation [NEB at the onset of lactation postpartum (p.p.) and a deliberately induced NEB by feed restriction near 100 d in mi...
متن کاملComparison of Different Lactation Curve Models to Describe Lactation Curve in Moroccan Holstein-Friesian Dairy Cows
In this study, the incomplete gamma function, an exponential function, a mixed-log function and a polynomial function were evaluated to describe the lactation curve in Moroccan Holstein-Friesian dairy cows. Data from 1990 to 1999, comprising 77130 monthly milk yields of 6029 dairy cows in 280 dairy herds, were used. Edits were carried out by considering the lactation length (5 d and
متن کاملRelationships between feeding behaviour and feed intake in dairy cows during early lactation
VII CHAPTER 1: Introduction 1 CHAPTER 2: Background 3 2.1 Feed intake in transition period 5 2.2 Regulation of feed intake 7 2.3 Feeding behaviour 14 2.4 Measuring of feeding behaviour 16 2.5 Physiological changes and metabolic disorders during transition period and early lactation 22 2.6 Sensor-based monitoring of feeding behaviour and feed intake as well as metabolic-related production diseas...
متن کاملOvarian function and estrus in dairy cows during early lactation.
The onset of ovarian function and occurrence of estms were monitored in two groups of Holstein cows over the first 90 days postpartum. Group 1 consisted of 36 animals housed in a free stall area and observed continuously for estrus with closed circuit television and a time lapse videorecorder. Group 2 consisted of 33 cows housed in tie stalls with estrus detected by the herdsmen. Blood samples ...
متن کاملRelationship between Early Lactation BCS and Mid-Lactation Feed Efficiency in Dairy Cattle
and Implications The relationships between body condition score (BCS) observed during the first 45 days of lactation and two measures of feed efficiency, residual feed intake (RFI) and gross efficiency (GE) defined as milk energy / DMI, measured during mid-lactation were assessed in 255 first lactation Holstein cows. No significant differences in BCS at calving and at approximately 40 days in m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1975
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(75)84657-1