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Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics

Forty-eight Landrace x Large White x Duroc pigs were used in each of two experiments to study the effect of diets with different protein and 1ysine:energy ratios on growth between 20 and 50 kg and on growth, and subsequent carcass characteristics, between 40 and 85 kg. The eight treatments in each e...

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Main Authors: Kuan, K. K., Mak, T. K., Farrell, D. J.
Format: Article
Language:English
Published: CSIRO Publishing 1986
Online Access:http://psasir.upm.edu.my/id/eprint/39928/1/26%20-%20Effect%20of%20dietary%20energy%20concentration%2C%20proteinenergy%20and%20lysine%20energy%20ratios%20on%20growth%20of%20pigs%20in%20the%20humid%20tropics.pdf
http://psasir.upm.edu.my/id/eprint/39928/
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spelling my.upm.eprints.399282015-09-23T02:50:51Z http://psasir.upm.edu.my/id/eprint/39928/ Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics Kuan, K. K. Mak, T. K. Farrell, D. J. Forty-eight Landrace x Large White x Duroc pigs were used in each of two experiments to study the effect of diets with different protein and 1ysine:energy ratios on growth between 20 and 50 kg and on growth, and subsequent carcass characteristics, between 40 and 85 kg. The eight treatments in each experiment comprised a 2x4 factorial design. The factors were digestible energy (DE) of 12.6 and 14.2 MJ/kg diet and four crude protein and lysine levels at each dietary energy level. The diets were based on combinations of traditional feed ingredients and local agricultural byproducts. Daily feed allowance (g) was calculated in both experiments by the formula: 110 Wkg.0.75, where W is liveweight. Pigs given high-energy diets grew faster, with a better feed conversion ratio, than those given the low-energy diets. In both experiments, growth rate of pigs was faster and feed conversion efficiency improved linearly (P<0.05) with increasing protein:energy ratio. Mean feed and DE intakes were the same on all treatments within an experiment. For pigs at 85 kg, killing-out percentage declined with increasing protein : energy ratio. Eye muscle area increased and back-fat thickness decreased as the protein and lysine contents of the diets increased. It appears that a protein (g):energy (MJ DE) ratio of about 15.1 for growing pigs, and 12.7 for finishing pigs, optimises performance. Corresponding total lysine (g): energy (MJ DE) ratios were 0.7 1-0.77 and 0.63-0.64, respectively. CSIRO Publishing 1986 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/39928/1/26%20-%20Effect%20of%20dietary%20energy%20concentration%2C%20proteinenergy%20and%20lysine%20energy%20ratios%20on%20growth%20of%20pigs%20in%20the%20humid%20tropics.pdf Kuan, K. K. and Mak, T. K. and Farrell, D. J. (1986) Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics. Australian Journal of Experimental Agriculture, 26 (3). pp. 285-289. ISSN 0816-1089
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Forty-eight Landrace x Large White x Duroc pigs were used in each of two experiments to study the effect of diets with different protein and 1ysine:energy ratios on growth between 20 and 50 kg and on growth, and subsequent carcass characteristics, between 40 and 85 kg. The eight treatments in each experiment comprised a 2x4 factorial design. The factors were digestible energy (DE) of 12.6 and 14.2 MJ/kg diet and four crude protein and lysine levels at each dietary energy level. The diets were based on combinations of traditional feed ingredients and local agricultural byproducts. Daily feed allowance (g) was calculated in both experiments by the formula: 110 Wkg.0.75, where W is liveweight. Pigs given high-energy diets grew faster, with a better feed conversion ratio, than those given the low-energy diets. In both experiments, growth rate of pigs was faster and feed conversion efficiency improved linearly (P<0.05) with increasing protein:energy ratio. Mean feed and DE intakes were the same on all treatments within an experiment. For pigs at 85 kg, killing-out percentage declined with increasing protein : energy ratio. Eye muscle area increased and back-fat thickness decreased as the protein and lysine contents of the diets increased. It appears that a protein (g):energy (MJ DE) ratio of about 15.1 for growing pigs, and 12.7 for finishing pigs, optimises performance. Corresponding total lysine (g): energy (MJ DE) ratios were 0.7 1-0.77 and 0.63-0.64, respectively.
format Article
author Kuan, K. K.
Mak, T. K.
Farrell, D. J.
spellingShingle Kuan, K. K.
Mak, T. K.
Farrell, D. J.
Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
author_facet Kuan, K. K.
Mak, T. K.
Farrell, D. J.
author_sort Kuan, K. K.
title Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
title_short Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
title_full Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
title_fullStr Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
title_full_unstemmed Effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
title_sort effect of dietary energy concentration, protein: energy and lysine: energy ratios on growth of pigs in the humid tropics
publisher CSIRO Publishing
publishDate 1986
url http://psasir.upm.edu.my/id/eprint/39928/1/26%20-%20Effect%20of%20dietary%20energy%20concentration%2C%20proteinenergy%20and%20lysine%20energy%20ratios%20on%20growth%20of%20pigs%20in%20the%20humid%20tropics.pdf
http://psasir.upm.edu.my/id/eprint/39928/
_version_ 1643832565708095488
score 13.211869

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