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yang nai niu zhi liu zhu yi
Author(s): HAN Zhanglian, ', '16029197, ', 'au', 'cjfq')
Pages: 26
Year: 2008
Issue:
2
Journal: Henan Journal of Animal Husbandry and Veterinary Medicine
Keyword: GetLinkList(KeywordFilter('奶牛泌乳:6804; 高产奶牛:3670; 挤奶:3139; 产奶量:3020; 饲养水平:2148; 泌乳盛期:2135; 泌乳量:1956; 性周期:1807; 膘情:1639; 胎次:1515'); 'kw'; 'CJFQ');
Abstract: <正>1适宜的挤奶次数要根据奶牛个体特点,确定适宜的挤奶次数。在一般情况下,奶牛泌乳期为305天,因奶牛年龄、胎次、膘情及饲养水平等情况不同,常会导致奶牛泌乳期延长或缩短。如果挤奶过度,会造成奶牛过度消耗体内营养,使奶牛发情不明显,性周期紊乱,较难受孕,影响到泌乳量的提高。高产奶牛、处于泌乳盛期或初次分娩的奶牛,每天可挤奶4次;
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