不同清洁型日粮降低规模猪场中氮、磷污染物排泄的研究

本试验旨在研究在肥育猪日粮中添加植酸酶、复合酶及微生态制剂3种清洁型日粮对规模猪场氮、磷排泄的影响。试验选取健康无病的60 kg左右的苏钟猪15头,随机分为5个处理,分别为对照组(正常磷水平)、负对照组(不加CaHPO₄)、负对照+植酸酶组、对照+植酸酶+复合酶+和美酵素组、对照+微生态制剂组。结果表明,3种清洁型日粮均可降低粪、尿中氮的排泄量,其中植酸酶组粪中氮的排泄量较对照组降低了0.55%(P＞0.05),植酸酶+复合酶+和美酵素组降低了10%(P＜0.05),微生态制剂组降低了6.11%(P＞0.05),其中植酸酶+复合酶+和美酵素组减排效果更佳,尿氮含量各组之间差异不显著(P＞0.05);粪中磷的排泄量植酸酶组较对照组降低了19.19%(P＞0.05),植酸酶+复合酶+和美酵素组降低了36.63%(P＜0.05),微生态制剂组降低了16.28%(P＞0.05),其中植酸酶+复合酶+和美酵素组减排效果最佳,尿磷的排泄量植酸酶组降低了12%(P＞0.05),植酸酶+复合酶+和美酵素组降低了16%(P＜0.05),微生态制剂组降低了12%(P＞0.05),以植酸酶+复合酶+和美酵素组减排效果最好。由此表明,在肥育猪日粮中添加清洁饲料可有效降低规模猪场中氮、磷排泄造成的环境污染,且以植酸酶、复合酶及和美酵素联合应用效果最佳。

Studies on the Effect of Different Clean Feeds on the Excretion of N and P in Large Scale Pig Farm

An experiment was conducted to investigate the effect of phytase,compound enzyme and probiotics supplemented in pig diets on the excretion of nitrogen and phosphorus in large scale pig farm. Fifteen Suzhong pig (60 kg) were randomly allocated to five treatments,control group (normal P level),negative control group (no CaHPO₄),negative control and phytase group,control and compound and phytase group,control and probiotics. The results showed that three diets decreased the excretion of nitrogen in manure and urine,the nitrogen excretion in phytase group decreased 0.55%(P＞0.05),compound and phytase group decreased 10%(P＜0.05),probiotics group decreased 6.11%(P＞0.05),and the reduction consequence of compound and phytase group was better than the others,the nitrogen excretion in urine was no significant differences(P＞0.05). Compared to the control group,the phosphorus excretion in manure of phytase group decreased 19.19%(P＞0.05),compound and phytase group decreased 36.63%(P＜0.05),probiotics group decreased 16.28%(P＞0.05),and the reduction consequence of compound and phytase group was better than the others,the phosphorus excretion in Urine of phytase group decreased 12%(P＞0.05),compound and phytase group decreased 16% (P＜0.05),probiotics group decreased 12%(P＞0.05),and the reduction consequence of compound and phytase group was better than the others. In conclusion,in the finishing pig diets supplemented with clean feeds decreased the environmental pollution caused by nitrogen and phosphorus excretion,and the reduction consequence of compound and phytase group was better.