不同豆粕添加量的日粮对奶牛产奶性能的影响  

Effect of different soybean meal supplementations on performance of lactating dairy cows

作　　者：王星凌[1] 赵红波[1] 游伟[1] 王文志[1] 吴丽丽[1] 

机构地区：[1]山东省农科院畜牧兽医研究所

出　　处：《饲料工业》2011年第9期37-39,共3页Feed Industry

基　　金：山东省科技厅攻关项目[2008GG10009022];国际合作项目"日粮功能性氨基酸对原奶品质调控机理研究与开发";山东省重大创新项目"奶牛精细饲养管理应用技术研究"的部分研究内容

摘　　要：将40头荷斯坦产奶牛随机分为4个试验组,每组10头。4种试验日粮均配制成蛋白质（CP）含量15.2%、产奶净能（NEL）6.90~7.06 MJ/kg。日粮通过调节豆粕和棉籽粕的用量改变日粮赖氨酸（Lys）含量,这样试验1组日粮赖氨酸含量为0.65%、试验2组0.62%、试验3组0.59%和试验4组0.56%。所有试验奶牛先饲喂10 d试验日粮作为预试期,然后开始70 d正试期。试验1组产奶量最高,平均为（27.13±1.53）kg/d;试验4组产奶量最低,平均为（24.40±1.56）kg/d;试验2组和3组依次为（26.18±1.37）和（25.27±1.58）kg/d;其中试验1组产奶量明显高于试验3组（P〈0.01）和试验4组（P〈0.01）,试验2组明显高于试验4组（P〈0.05）。因此,在日粮蛋白质含量保持相同和产奶净能相近的条件下,提高日粮赖氨酸含量则提高了奶牛产奶量,降低日粮赖氨酸含量则降低了奶牛产奶量;大量使用棉籽粕替代豆粕降低日粮赖氨酸含量,导致产奶量降低;尽管日粮赖氨酸含量容易提高奶牛日粮成本,由于提高产奶量,增加了产奶纯收入。使用日粮赖氨酸含量这一指标有利于评价奶牛产奶量、乳成分和经济效益。Forty Holstein lactating cows were randomly allocated to four treatments with tour diets. Based on 15.2% CP and NEt6.90-7.06 MJ/kg of the diets, the dietary lysine content was 0.65%, 0.62%, 0.59% or 0.56% for treatment 1, treatment 2, treatment 3 or treatment 4 by altering soybean meal （SBM） or cotton- seed meal （CSM） supplementations. The cows were fed the experimental diets for a 10 day adaptation period followed by a 70 day lactation trial. During the study, milk production of cows were highest for treatment 1（27.13±1.53） kg/d and lowest for treatment 4（24.40±1.56） kg/d, and milk production for treatment 2 or treatment 3 was （26.18±1.37） or （25.27±1.58） kg/d. Treatment 1 had higher milk production than that of treatment 3 （P〈0.01）or treatment 4 （P〈0.01）, and treatment 2 had higher milk production than that of treatment 4 （P〈0.05）. Therefore, the high content of dietary lysine increased milk production and the low content of dietary lysine decreased milk production under conditions of the same dietary protein content and similar dietary NEI. A large use of cottonseed meal in the diet made low dietary lysine content, result- ing in the tow milk production. The high content of dietary lysine increased milk production and net income from milk though the cost of lactating diet was easily increased. Dietary lysine content as a key factor of nutri- tion evaluation is conducive to milk yield, milk composition and economic benefits.

关 键 词：豆粕添加量 日粮赖氨酸含量 产奶量 产奶奶牛 

分 类 号：S816.11[农业科学—饲料科学]