Milk yield persistency and its relationship with health problems in Holstein dairy cows supplemented with different levels of ruminally protected methionine and choline
نویسندگان
چکیده
منابع مشابه
Milk yield persistency and its relationship with health problems in Holstein dairy cows supplemented with different levels of ruminally protected methionine and choline
Forty Holstein dairy cows in their first and second lactation were used in a lactation study from 4-week prepartum through 14-week postpartum to investigate the potential effect of feeding different levels of ruminally protected methionine and choline on milk yield persistency of Holstein dairy cows. Cows were randomly assigned to receive one of the following treatments: 18 g/d of rumen-protect...
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Ludmila Křížová1*, Jiří Třináctý1, Michal Richter1, Sylvie Hadrová1 and Jan Pozdíšek2 1 Research Institute for Cattle Breeding, Ltd., Rapotín, Department of Animal Nutrition Physiology, Pohořelice, Vídeňská 699, Pohořelice, 691 23, Czech Republic 2 Research Institute for Cattle Breeding, Ltd., Rapotín, Department of Feed Production and Animal Nutrition, Rapotín, Výzkumníků 267, Vikýřovice 788 1...
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The objective of the present study was to estimate genetic trends for lactation milk yield, persistency of milk yield, somatic cell count and interval between first and second calving in Holstein dairy cows of Iran. The dataset consisted of 210,625 test day and 25,883 first parity cows with milk yield recorded from July 2002 to September 2007 comprising 97 herds in Iran. Breeding values of anim...
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نظریه هوش چندگانه قسمتهای متفاوت هوش بشری را مورد بررسی قرار می دهد که با شناخت آن شخص به درک بهتری از توانایی های خود میرسد و در نتیجه سعی در استفاده از آن جهت یادگیری بهتر میکند. همچنین با شناخت استعداد دانش آموزان، فرایند یادگیری بهتر میشود. هدف از انجام دادن این تحقیق بررسی رابطه بین هوش ریاضی و استعداد یادگیری زبان انگلیسی میباشد. برای انجام این تحقیق از پرسشنامه هوش ریاضی که توسط شیرر در ...
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ژورنال
عنوان ژورنال: Archives Animal Breeding
سال: 2010
ISSN: 2363-9822
DOI: 10.5194/aab-53-266-2010