摘要
本文以武汉市武昌奶牛场、八一奶牛场 1995～ 1999年 5 6 3头荷斯坦牛的产奶量记录为材料 ,采用多项式回归法 ,研究了武汉市荷斯坦奶牛产奶量与其泌乳天数、胎次和产犊月份 (季节 )几项因素之间的一元回归关系以及与年—季、胎次和泌乳天数之间的多元回归关系。得出了 4个最优回归方程 ,其拟合度 (R2 )分别达到 0 95 6 (P<0 0 1)、0 990 (P <0 0 1)、0 988(P <0 0 1)、0 5 6 3(P <0 0 5 ) ,并据此制订了武汉市乳牛产奶量的校正系数表 。
This study based on the milk yield records of Holstein cows from Wuchang and Bayi Dairy Farm from 1995 to 1999 in Wuhan.The relationships between milk yield and milking days,parity number,calving months were investigated with the simple statistical polynomial regression analysis method.Multi regression was also investigated between milk yield and these factors.Four best regression equations were established (extremely significant or significant) and R 2 (reliability) were 0 956,0 990,0 988,0 563 respectively.Tables of coefficients for adjusting milk yield of Holstein cattle in Wuhan were presented.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2002年第3期239-242,共4页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
