Variation between Breeds in Feed Cost of Milk Production
نویسندگان
چکیده
منابع مشابه
Breeds of Sheep for Commercial Milk Production
Any producer contemplating the prospect of sheep dairying will face the problem of breeds: which breeds or what type of animals to purchase (or develop) in order to have the most economical commercial milk production? The problem is not an easy one to solve because there is not a single breed that combines all favorable traits. Some breeds are better than others in producing milk and others are...
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پژوهش حاضر با هدف بررسی اثر جیره حاوی کربوهیدراتهای غیرالیافی زیاد و بروز التهاب در گاوهای شیرده در دو آزمایش جداگانه انجام شد. در آزمایش اول 20 رأس گاو مبتلا به ورم پستان از دو گروه کم تولید و پرتولید (هر کدام 10 رأس) و 20 رأس گاو سالم از دو گروه کم تولید و پرتولید (هر کدام 10 رأس) انتخاب شدند. همه گاوها در دوره دوم و یا سوم شیردهی و در روزهای 80-120 پس از زایش بودند. میانگین تولید شیر در گروه...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1946
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(46)92487-3