红薯渣对奶牛产奶量和奶品质的影响

摘要试验选用；35头健康无病、处于泌乳中期、胎次相同、体重相近（体重约450kg）、产奶量相近（P〉0．05）的荷斯坦奶牛，随机分为2组：对照组10头，用产奶期正常饲料饲喂；试验组25头，每头牛在对照组日粮基础上投5kg新鲜红薯渣替代5kg苜蓿干草。结果表明：在产奶期日粮中添加新鲜红薯渣对奶牛的产奶量没有显著影响（P〉0．05）；从乳成分试验统计数据看，其对奶牛的乳成分影响不明显，乳脂、乳蛋白、乳糖、乳固形物和非脂固形物均无显著差异（P〉0．05）。

Effect of swat potato residues on milk yield and quality of dairy cattle

25 healthy and mid-lactation Holstein cows with the same parity, body weight （about 450kg）, similar milk production （P〉0.05） were randomly divided into two groups： 10 cows in control group were fed on lactation period normal diet, 25 cows in treatment group were fed on the diet putting into five kilograms fresh sweet potato residues in place of lucerne hay in control diet basis. The results indicate that putting fresh sweet potato residue into lactation period diet has no significantly influence on milk yield （P〉0.05）; according to test statistic data of milk compositions, it has no remarkable effect on milk compositions, milk fat, milk protein, lactose, milk solids and non-fat solid have no significantly influence neither （P〉 0.05）.