摘要
选取甘肃临洮华加牧业有限公司99头健康的泌乳奶牛,测定每头奶牛305d产奶量,计算其经济效益,并进行奶牛产奶量与经济效益的相关性分析,得出产奶量与经济效益的相关系数及回归方程。结果表明:受胎指数与基因型的互作是致使屋顶效应形成的主要因素,受胎指数显著制约经济效益。
99 healthy lactating cows from the Huajia Animal Husbandry Co., Ltd. were selected to measure 305 d milk yields of each cow and calculate its cost-effectiveness. Then the correlation analysis of milk yield and economic benefit was conducted to get the correlation coefficient and regression equation. The results showed that the interactions between conception index and genotype is the main factor that leading to ceiling effect, and conception index is the main factor that restricting the economic benefits.
出处
《湖南农业科学》
2010年第7期146-148,共3页
Hunan Agricultural Sciences
关键词
奶牛
基因型与环境的互作
屋顶效应
经济效益
cow
interactions between genotype and environment
ceiling effect
economic benefit
