低磷饲粮添加植酸酶对生长猪生长性能、营养物质表观消化率和排泄量的影响

发布时间：2018-09-01 07:39

【摘要】：本试验旨在研究低磷饲粮中添加不同浓度的植酸酶对生长猪生长性能、养分表观消化率和粪便中矿物元素排泄量的影响。试验选用112头初始重为35~40 kg的健康长×大二元杂交生长猪,随机分为4个处理,每个处理4个重复,每个重复7头生长猪。阳性对照组饲喂常磷饲粮,阴性对照组饲喂低磷饲粮,试验组在低磷饲粮基础上分别添加500、1 000 U/kg的植酸酶。结果表明:相比于不添加植酸酶的低磷饲粮组,低磷饲粮+植酸酶组显著提高了生长猪的日增重、降低了耗料增重比(P0.05),显著提高了灰分和磷的表观消化率、苯丙氨酸和半胱氨酸的表观消化率(P0.05),显著提高了铜、铁、锰、镁和钴的表观消化率(P0.05),显著降低了粪便中磷、铜、铁、锰和钴的排泄量(P0.05)。由此可知,玉米-豆粕型低磷饲粮中添加植酸酶能够显著改善生长猪的生长性能、提高养分表观消化率、减少粪便中矿物元素的排泄量;在本试验条件下,生长猪饲喂有效磷2.4 g/kg的玉米-豆粕型饲粮时,添加500 U/kg植酸酶可达到与常磷饲粮相同的生长性能,添加1 000 U/kg植酸酶时养分表观消化率提高更明显。
[Abstract]:The purpose of this experiment was to study the effects of different concentrations of phytase on growth performance, apparent nutrient digestibility and excretion of mineral elements in feces of growing pigs. One hundred and twelve healthy crossbred pigs with an initial weight of 35 ~ 40 kg were randomly divided into 4 treatments, 4 replicates per treatment and 7 growing pigs per replica. The positive control group was fed with normal phosphorus diet, while the negative control group was fed with low phosphorus diet. The experimental group was fed with 500 U/kg phytase on the basis of low phosphorus diet. The results showed that compared with the low phosphorus diet group without phytase, the daily gain of growing pigs was significantly increased, the feed gain ratio (P0.05) was decreased, and the apparent digestibility of ash and phosphorus was significantly increased in the low phosphorus diet group. The apparent digestibility of phenylalanine and cysteine (P0.05) significantly increased the apparent digestibility of copper, iron, manganese, magnesium and cobalt (P0.05), and significantly decreased the excretion of phosphorus, copper, iron, manganese and cobalt in feces (P0.05). It can be concluded that the addition of phytase in corn-soybean meal diet can significantly improve the growth performance, increase the apparent digestibility of nutrients and reduce the excretion of mineral elements in feces. The growth performance of growing pigs fed with corn-soybean meal diet with available phosphorus of 2.4 g/kg could reach the same growth performance as that of normal phosphorus diet, and the apparent digestibility of nutrients increased more significantly when adding 1 000 U/kg phytase.
【作者单位】：北京市农林科学院畜牧兽医研究所;
【基金】：生猪产业技术体系北京市创新团队(BAIC02-2016)
【分类号】：S828.5

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