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Effect of dietary supplementation of microbial protease on performance, egg quality and nitrogen retention in white leghorn layers

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Title Effect of dietary supplementation of microbial protease on performance, egg quality and nitrogen retention in white leghorn layers
Not Available
 
Creator Rama Rao, S. V.
T. Srilatha
M.V.L.N. Raju
Nagalakshmi D
S.S. Paul
B. Prakash
 
Subject albumen quality, chicken, crude protein, egg production, egg quality, layers, nitrogen retention, protease supplementation, white leghorn
 
Description Not Available
Context. Protease supplementation increases the digestibility of protein, which enables reduction in the requirement
of crude protein (CP) in the diet for optimum performance and egg quality in laying chickens.
Aims. An experiment was conducted to study the effects of protease supplementation (0 and 4000 u/kg) in diets
containing three graded levels of CP on egg production, egg quality and nitrogen retention in layers.
Methods. Three diets with 15, 16.5 and 18% CP with uniform metabolisable energy (10.67 MJ/kg) were prepared.
Each diet was supplemented with (4000 u/kg) or without protease in a 3 ยท 2 factorial arrangement. Each diet was fed
ad libitum to six replicates consisting of 88 white leghorn laying chickens in each from 53 to 72 weeks of age.
Key results. Supplementation of protease significantly (P < 0.05) improved performance (egg production, feed
efficiency and bodyweight) and egg albumen quality (Haugh unit score). Layer performance was not affected by
reducing the dietary CP from 18 to 15%. The interaction between CP level and protease supplementation did not
influence the laying performance and egg quality parameters studied. Nitrogen retention reduced significantly
(P < 0.05) with increase in dietary CP level from 15 to 18%. Supplementation of protease significantly (P < 0.05)
improved the N retention.
Conclusions. The results suggested that 15% CP was adequate for optimum layer performance during the latter part of
egg production phase (53 to 72 weeks of age). Protease supplementation improved the layer performance, egg albumen
quality and nitrogen retention.
Implications. The results of this study will contribute for optimisation of dietary protein level in layer diet.
Utilisation of dietary protein can be enhanced with protease supplementation which results in enhanced egg production
and albumen quality in egg laying chickens.
Not Available
 
Date 2021-04-30T07:10:15Z
2021-04-30T07:10:15Z
2020-05-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/46917
 
Language English
 
Relation Not Available;
 
Publisher CSIRO PUBLISHING