| Performance and Nutrient Utilization of Layers Fed Diet Supplemented with Microbial Phytase and Cellulase |
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| 作者姓名： | WANG Li juan SHAN An shan SONG Jin cai |
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| 作者单位： | Animal Nutrition Institute，Northeast Agricultural University，Harbin Heilongjiang，150030，PRC |
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| 摘 要： | 1 Introduction The majority of the P in cereal grains and oilseed meals is organically bound as phytic acid orphytate.Phytate has potential to form insoluble complexes with protein and minerals such as P and Ca ,Cu ,Fe ,Mn ,Zn 〔1,2〕,which can negatively affect availabilities and digestibilities of minerals,protein or aminoacids〔3 ,4〕.Furthermore,phytate is also able to bind endogenous proteases such as trypsin and chymotrypsinin the gastrointestinal tract〔5〕,and these complexes ma…
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| 关 键 词： | 蛋鸡 饲料添加剂 植酸梅 纤维素酶 生产性能 营养利用率 胫骨品质 |
Performance and Nutrient Utilization of Layers Fed Diet Supplemented with Microbial Phytase and Cellulase |
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| WANG Li juan,SHAN An shan,SONG Jin cai.Performance and Nutrient Utilization of Layers Fed Diet Supplemented with Microbial Phytase and Cellulase[J].Journal of Northeast Agricultural University,2003,10(1):33-39. |
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| Authors: | WANG Li-juan SHAN An-shan SONG Jin-cai |
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| Abstract: | A 31-week feeding trial was conducted to investigated the effects of dietary supplementation of microbial phytase and cellulase on performance,nutrients utilization and tibia quality of laying hens fed maize and soybean meal diets.192 18-week-old Hisex layers were used in the trial A 2×2×2 factorial design was used in the experiment with three factors of two levels each:0.38% and 0.16% of dietary non-phytate P(nP).0 and 300 U*kg-1 of phytase (Ph),and 0 and 0.10% of cellulase (Ce).The results showed that supplementation of 300 U*kg-1 phytase significantly improved utilization of dietary crude ash,CP,Ca,total P and copper (P<0.05),and improved tibia breaking strength (P<0.05).No effect of phytase on performance was observed.Addition of 0.10% cellulase decreased feed intake (P<0.05),increased utilization of CF (P<0.05) and Ca(P<0.01),and decreased total tibia ash weight (P<0.05).300 U*kg-1 phytase and 0.10% cellulase exhibited obvious positive interactions to enhance utilization of dietary phytic P and copper (P<0.05).0.16% nP did not reduce performance of the layers,but improved egg shell quality at 20 wks,increased utilization of dietary total P,phytic P and Copper (P<0.01),decreased utilization of dietary CP,increased tibia breaking strength and Ca,Mn contents of tibia(P<0.01) |
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| Keywords: | microbial phytase cellulase layers performance utilization of nutrientss |
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