【摘要】 为了给河西地区肉牛养殖场提供青年牛培育、饲养管理、选种选配及规模性生产科学依据,对近年来引进的弗莱维赫牛与河西地区西门塔尔牛杂交类群（统称弗西杂交类群）的生长发育情况进行了深入研究。以富进养殖场2010年以来的127头（包括53头公牛,74头母牛）弗西杂交类群新品系为试验材料,测定了初生、3月龄、6月龄、9月龄、12月龄、15月龄、18月龄牛的体重、体高、体斜长、胸围和管围,分析其生长发育规律,绘制生长发育曲线;同时,分析了弗西杂交类群18月龄体尺与体重间的相关性,并建立了18月龄体重估测回归模型。结果表明:犊牛生长速度和生长强度在0⁶月龄最大,12月龄之后生长相对缓慢;18月龄各体尺指标与体重之间均存在不同程度的极显著正相关（P<0.01）。分析获得4个体尺指标与体重之间的回归模型,拟合度决定系数（R²）:0.814、0.655、0.745、0.814,说明拟合度较好。体重估测最优模型为:y=-880.088+2.140 x₂+3.203 x₃+19.003 x₄。结论:利用弗莱维赫牛对河西地区西门塔尔牛进行杂交改良,其后代具有良好的生长发育性能,表现为体重增加明显、骨骼健壮、抗病力强、耐粗饲,值得大力推广。更多还原

【Abstract】 To provide scientific basis for young cattle breeding,feeding managemen t,seed selection and apolegamy,and scale production in beef cattle breeding field in Hexi region,the regularity of growth and development of introducing the hybrid cattle of Fleckvieh crossbred with Hexi area Simmenta（lrecorded as the Fuxi cattle）in recent years were studied. A total of 127 Fuxi cattle new variety in the Fujin breeding field since 2010（including 53 bull,74 cows）were used as experiment subjects. The body weight,the body height,the body length,the chest circumference and cannon bone circumference of cattle at the birth,the 3months old,the 6 months old,the 9 months old,the 12 months old,the 15 months old and the 18 months old were measured. The growth and development patterns of the cattle were analyzed and a growth and development curve was drawn. Meanwhile,the correlations between the body measurement and weight of the Fuxi cattle at 18 months old were analyzed. Besides,an estimated regression model of body weight of cattle at 18 months old was established.The calves growth rate and intensity were maximum at 0-6 months and the growth was relatively slow after 12 months old. There were different levels of extremely significant positive correlation between each body measurement indicators and weight of cattle at 18 months old（P<0.01）. A regression model of four body measurement indicators and weight was analyzed and obtained,and the fitting degree determination coefficients（R²）were 0.814,0.655,0.745 and 0.814,indicating relative good fitting degree. The optimal weight estimation model was y=-880.088 + 2.140 x₂+ 3.203 x₃+ 19.003 x₄. It was concluded that Hexi local Simmental was improved by crossbreeding with Fleckvieh. The offsprings have good growth and development performances,show significant weight gain,strong skeletons,strong disease resistance,and crude feed resistance,and is worthy of promotion.更多还原