The effect of variations in the energy and protein status of the diet upon productive efficiency in the pig

Author:

Costain R. A.,Morgan J. T.

Abstract

A feeding trial is described in which 32 individually-fed Large White pigs were used to investigate the effects of variations in the protein and energy status of the diet on growth, efficiency of food utilisation and carcass characteristics. The salient features of the finding were:1. Over the weight interval 50–100 lb., it appeared that 1·0% was a more appropriate level of dietary lysine than one of the order of 0·75%; the former figure corresponded to a level of 5·8% of dietary protein.2. In the ‘finishing phase’ of growth from 100–200 lb. the pig clearly tolerates wider energy : protein ratios than is the case in earlier life, with advantageous results in terms of growth performance but deleterious effects on carcass suitability.3. An increase in dietary energy status in the ‘finishing phase’ yields growth responses only if protein level is appropriately adjusted.4. It is suggested that Large White pigs require a level of 0·5–0·6% of dietary lysine in the ‘finishing’ period.

Publisher

Cambridge University Press (CUP)

Subject

Animal Science and Zoology

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Polyamides, General;Kirk-Othmer Encyclopedia of Chemical Technology;2000-12-04

2. Replacement value of brewers' dried grain for maize on performance of pigs;Journal of the Science of Food and Agriculture;1994-12

3. Soybeans in Diets of Growing Pigs;East African Agricultural and Forestry Journal;1978-04

4. Protein, lysine and feed intake level effects on pig growth;The Journal of Agricultural Science;1969-12

5. Protein, lysine and feed intake level effects on pig growth: I. Main effects;The Journal of Agricultural Science;1969-06

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