微生物植酸酶对饲喂低磷玉米-大豆日粮的攸县麻鸭生长性能、血浆参数及回肠氨基酸表观消化率的影响

Effect of a microbial phytase on growth performance, plasma parameters and apparent ileal amino acid digestibility in Youxian Sheldrake fed a low-phosphorus corn-soybean diet.

作者信息

He Shaoping, Medrano R F, Yu Qifang, Cai Yixin, Dai Qiuzhong, He Jianhua

机构信息

College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China.

Department of Animal Nutrition and Feed Technology, Animal Husbandry and Veterinary Institute of Hunan Province, Changsha 410131, China.

出版信息

Asian-Australas J Anim Sci. 2017 Oct;30(10):1442-1449. doi: 10.5713/ajas.16.0897. Epub 2017 Feb 23.

DOI:10.5713/ajas.16.0897

PMID:28231702

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5582329/

Abstract

OBJECTIVE

This study investigated the effect of microbial phytase supplementation on growth performance, tibia ash, plasma parameters, apparent ileal digestibility (AID) of amino acid (AA) and apparent digestibility of nutrients in Youxian Sheldrakes fed with low-phosphorus (P) corn-soybean diets.

METHODS

A total of 350 Youxian Sheldrakes (7d old) were randomly divided into 5 treatment groups: positive control (PC) group has adequate available P diet (0.42% and 0.38%, starter and grower), negative control (NC) group were deficient in available P (0.32% and 0.28%, starter and grower) and NC diet was supplemented with 3 levels of microbial phytase (500, 750, and 1,000 U/kg).

RESULTS

Dietary supplementation of phytase in NC diet improved the average daily gain, increased the levels of serum calcium (Ca), tibia Ca and P, AID of AA and apparent digestibility of energy and Ca in starter stage (p<0.05). There was an increased (p<0.001) in the utilization of P from 17.3% to 23.9%. Phytase supplementation (1,000 U/kg) has shown that the AID of His, Thr, Val, indispensable AA, Glu, Pro, and dispensable AA was higher (p<0.05) than that of NC. Moreover, phytase supplementation improved (p<0.05) serum and tibia Ca and P, AID of AA and apparent digestibility of dry matter, crude protein, energy, P and Ca, and reduced (p<0.05) feed to gain ratio (F/G) and the levels of serum alkaline phosphatase in grower stage. Likewise, an increase (p<0.001) in the utilization of P was noticed from 12.6% to 17.2%. Supplement phytase at 750 U/kg improved the AID of His, Thr, Asp, Cys, Pro, and Ser (p<0.05).

CONCLUSION

The microbial phytase supplement could improve growth performance, AID of some AA and apparent utilization of other nutrients in Youxian Sheldrakes, and reduce excreta P load to environment.

摘要

目的

本研究探讨了在低磷玉米-豆粕日粮中添加微生物植酸酶对攸县麻鸭生长性能、胫骨灰分、血浆参数、氨基酸表观回肠消化率（AID）及养分表观消化率的影响。

方法

将350只7日龄攸县麻鸭随机分为5个处理组：正对照组（PC）饲喂有效磷充足的日粮（分别为0.42%和0.38%，育雏期和生长期），负对照组（NC）饲喂有效磷缺乏的日粮（分别为0.32%和0.28%，育雏期和生长期），NC日粮添加3个水平的微生物植酸酶（500、750和1000 U/kg）。

结果

在NC日粮中添加植酸酶可提高育雏期平均日增重，提高血清钙（Ca）、胫骨灰分Ca和P含量、氨基酸表观回肠消化率以及能量和Ca的表观消化率（p<0.05）。磷利用率从17.3%提高到23.9%（p<0.001）。添加1000 U/kg植酸酶组，His、Thr、Val、必需氨基酸、Glu、Pro和非必需氨基酸的表观回肠消化率高于NC组（p<0.05）。此外，在生长期添加植酸酶可提高血清和胫骨灰分Ca和P含量、氨基酸表观回肠消化率以及干物质、粗蛋白、能量、P和Ca的表观消化率（p<0.05），降低料重比（F/G）和血清碱性磷酸酶水平（p<0.05）。同样，磷利用率从12.6%提高到17.2%（p<0.001）。添加750 U/kg植酸酶可提高His、Thr、Asp、Cys、Pro和Ser的表观回肠消化率（p<0.05）。