Effects of stage of lactation and pregnancy and their interactions on milk yield and constituents.
作者： A.K. Sharma , C.J. Wilcox , F.G. Martin , W.W. Thatcher
DOI: 10.3168/JDS.S0022-0302(90)78829-7
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摘要: Abstract Effects of stage lactation and pregnancy their interactions on 17 milk yield constituent traits Holsteins Jerseys were studied. Data 11,120 Jersey 11,092 Holstein daily samples. After adjustment for all other known systematic genetic environmental effects, influenced accounted 11.8 to 26.3% variation in yields .2 9.9% percentages. In general, declined percentages increased after about 3 mo lactation. Chloride percentage showed an initial decline then a rise 2 mo. Stage small but significant most traits; was .4%
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