Energy Requirements of Dairy Cows
نویسندگان
چکیده
منابع مشابه
A Method of Estimating Total Energy Requirements for Grazing Dairy Cows from Milk Yield
A method of estimating the annual energy requirements for a dairy herd in Queensland was developed from nutritional standards and observed correlations of liveweight and milk production obtained from farm survey data. Maintenance energy requirements were calculated from liveweight estimated from milk yield, and together with energy requirements for milk yield, and allowances for walking and liv...
متن کاملRequirements of fat-soluble vitamins for dairy cows: a review.
Knowledge about vitamins has evolved greatly since they were discovered < 100 yr ago, but the quantitative determination of the vitamin requirements of dairy cows has been difficult. Current requirements are based on data that are at least 20 yr old and, in some cases, > 50 years old. The response variables in those studies were the prevalence of overt signs of deficiency, level of milk product...
متن کاملLameness in dairy Cows
This paper intended to review the lameness in dairy cattle. But it was necessary to have an overview about the hoof anatomical structure, it's growth and overgrowth properties. Most common causes of lameness such as laminitis and its different clinical form or presentation such as sole ulcers, toe ulcers, white line disorders, sole and white linehemorrhages have been reviewed and discussed. ...
متن کاملMaintenance Energy Requirements of Double-Muscled Belgian Blue Beef Cows
Sixty non-pregnant, non-lactating double-muscled Belgian Blue (DMBB) cows were used to estimate the energy required to maintain body weight (BW). They were fed one of three energy levels for 112 or 140 days, corresponding to approximately 100%, 80% or 70% of their total energy requirements. The relationship between daily energy intake and BW and daily BW change was developed using regression an...
متن کاملFishmeal for DAIRY COWS
FIN is an initiative ot the Grain and Feed Trade Association, funded by the Sea Fish Industry Authority Today's dairy farmer faces many challenges. Depressed milk prices focused attention on the need to improve productivity, reduce input costs and add value to milk output. At the same time, milk processors and consumers are stepping up their demands for assurances of safe, healthy products – pr...
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: 1925
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(25)93954-9