能量水平对后备牛乳腺发育影响的研究

The Effect of Dietary Energy Level on Breast Development of Replacement Cattle

评价一个奶牛场后备力量是否充足,其中一个很重要的指标就是看它的后备牛体况及乳腺发育情况。根据后备牛生长发育快的特点,从经济效益方面考虑,增加饲粮能量供给可使后备牛快速生长,尽快达到准配标准,从而减少饲养成本提高经济效益。但是许多研究表明,过多的能量供给会造成乳腺脂肪沉积,影响乳腺发育,最终影响产奶量;过少能量供给同样会使乳腺发育受阻。因此,本文从乳腺组织、激素变化等方面阐述能量水平对乳腺发育的影响。

The body condition and breast development situation of replacement cattle were the importation indicator to evaluation the adequate reserve force of the dairy farm.According to the characteristics of fast growth and form the economic benefit consideration,the increasing of dietary energy supply of replacement cattle could increase the growth to replacement cattle,to achieve quasi with a standard as soon as possible to reduce feed costs and increase economic efficiency.But many studies showed that excessive energy supply would cause mammary fat deposition,affect breast development and ultimately affect the milk production;too little energy supply would also make breast retarded.Therefore,the article was aim to expound the effect of energy level on mammogenesis in terms of breast tissue and hormone changes.