植酸酶对蛋鸭磷生物学利用率的研究  

EFFECTS OF PHYTASE SUPPLEMENTATION ON BIOLOGICAL AVAILABILITY OF PIN LAYING DUCKS

作　　者：唐岭田[1] 黄志勇[2] 杨在宾[2] 杨维仁[2] 徐帅 张桂凤[2] 

机构地区：[1]临沂师范学院农林学院动物医学系,山东临沂276005 [2]山东农业大学动物科技学院,山东泰安271018 [3]青岛市崂山区农林局,山东青岛266100

出　　处：《山东农业大学学报（自然科学版）》2009年第3期334-340,共7页Journal of Shandong Agricultural University：Natural Science Edition

基　　金：国家自然科学基金(30471261)

摘　　要：目的研究植酸酶对蛋鸭磷生物学利用率的影响。方法选取200日龄产蛋鸭1000只，随机分为5个处理，每个处理4个重复，每个重复50只。处理AP0．45％为对照组，有效磷水平为0．45％；处理AP0．38％＋Phy、AP0．32％＋Phy、AP0．25％＋Phy和AP0．18％＋Phy有效磷水平依次为0．38％、0．32％、0．25％、0．18％。同时添加植酸酶500FTU／kg。结果结果表明：日粮有效磷水平从0．45％降低到0．25％，同时添加500FTU／kg植酸酶，不会影响蛋鸭的料蛋比和产蛋率（P〉0．05）；蛋鸭血清ALP活性、P含量及胫骨灰分和P含量与对照组相比差异不显著（P〉0．05）；对蛋鸭磷生物学利用进行综合评定，日粮中AP水平从0．45％降低到0．25％，同时添加500FTU／kg植酸酶，能够提高P的利用率（P〈0．05），并使蛋鸭粪尿P排泄量降低4．86％～19．24％（P〈0．05），说明0．25％以上的日粮AP能够改善蛋白质和P、Fe的平衡，有利于环保。This experiment was determint to the effects of phytase on biological availability of P in laying ducks. A total of 1000 laying ducks （200 - d - old） were allotted to 5 treatments with 4 replicates. AP0.45 % （AP： 0. 45% ） was the control group without phytase. AP0. 38% ＋ Phy, AP0. 32% ＋ Phy, AP0. 25% ＋ Phy and AP 0. 18% ＋ Phy were supplemented with 500 phytase FTU/kg of diet and the AP concentrent was 0.38 % , 0. 32 %, 0.25 %, 0. 18 % respectively, The results showed that diets AP decreased from 0. 45 % to 0.25 % and supplements with 500 phytase can＇ t influence the performance, plasma ALP activity and P content, tibia ash and P content（ P 〉0.05 ）. Utilization of P were significantly improved （ P 〈 0.05 ） with diets AP decreased from 0. 45% to 0. 25% and supplements with 500 FTU phytase. The rate of excretion P was decreased by 4.86% 19.24%. This reflected 0. 25% AP levels in diets supplementated with 500 FTU phytase could improve normal homeostasis of P and be profit to environmental protection and ecology.

关 键 词：蛋鸭 植酸酶 磷 生物学评定 

分 类 号：Q341[生物学—遗传学]