低磷低蛋白日粮添加植酸酶和氨基酸对泌乳母猪粪氮磷排出量的影响

选择3~7胎长白×大白二元杂交母猪45头,随机分为3个组,每个组15头,泌乳期21 d。处理1组的日粮粗蛋白为18%、总磷为0.68%;处理2组的日粮粗蛋白为16.5%、总磷为0.58%;处理3组的日粮粗蛋白为15%、总磷为0.58%;处理2组和处理3组日粮中添加植酸酶。结果表明,日粮蛋白质降低1.5~3个百分点和总磷降低0.1%,对泌乳母猪的采食量和哺乳仔猪日增重无显著影响,母猪泌乳期体重损失显著减少,粪氮和磷的排放量显著减少。

Effect of low phosphorus and low protein diet adding phytase and amino acids on nitrogen and phosphorus excertion of lactating sows

Forty five crossbred sows (Landrace ×Yorkshire) with 3~7 parity were selected and randomly divided into 3 groups,each group had 15 sows,and the lactation length was 21 days. The crude protein in the diet of group1 was 18%, and the total phosphorus was 0.68%;The crude protein in the diet of group2 was 16.5%, and the total phosphorus was 0.58%; The crude protein in the diet of group3 was 15%, and the total phosphorus was 0.58%;The diet of group2 and group3 added phytase. The results showed that feed in-take of lactating sows and average daily gain of litter was not affected negatively(P>0.05),sow weight loss , fecal nitrogen and phospho-rus excertoin were decreased significantly (P<0.05),while total phosphorus decreased by 0.1%and the reduction of dietary CP was 1.5 to 3.