CAJ | 학술논문

为研究荷黄级进杂交后代在生长发育和泌乳性能方面与纯种荷斯坦奶牛的异同,将32头奶牛根据荷斯坦牛血统含量分为3个组,测定了各组的不同月龄体重、体尺指标和泌乳性能.结果表明:随着荷黄级进杂交代数的提高,杂种后代在生长发育和泌乳性能方面与纯种荷斯坦牛的差距逐渐缩小;荷黄级进杂交三代与纯种荷斯坦牛305 d产奶量、乳脂率、15月龄体重、体高、胸围、腹围差异不显著,改良效果明显,适宜在北方农区生产体系中推广养殖.
위연구하황급진잡교후대재생장발육화비유성능방면여순충하사탄내우적이동,장32두내우근거하사탄우혈통함량분위3개조,측정료각조적불동월령체중、체척지표화비유성능.결과표명:수착하황급진잡교대수적제고,잡충후대재생장발육화비유성능방면여순충하사탄우적차거축점축소;하황급진잡교삼대여순충하사탄우305 d산내량、유지솔、15월령체중、체고、흉위、복위차이불현저,개량효과명현,괄의재북방농구생산체계중추엄양식.
Thirty-two dairy cows were divided into three groups according to the various blood line of Holstein Friesian to compared the difference between pured Holstein and descendants by grading hybridization from Yellow cattle and Holstein proven sire in growth and milk performance. Body weight, ruler index of various month-old cows and milk performance were measured respectively. The results showed that the growth and milk performance gap between pured Holstein and descendants by grading hybridization were reduced gradually with the increasing of upgrading; descendants by grading hybridization had no difference with the pured Holstein after grading three generation.