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Effect of low protein diets and lysine supplementation on growth performance and carcass characteristics of growing pigs

机译：低蛋白日粮和赖氨酸补充对生长猪生长性能和car体特性的影响

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The?present study was to assess the effect of feeding low protein diet with or without supplemental lysine to meet NRC (1998) requirement on growth performance, carcass trait, meat composition, and meat quality of pigs. An experiment of 126 days was conducted on 21 crossbred Landrace pigs (average weight 11.72 ± 0.57 kg, average age 7.59 ± 0.14 weeks). Animals were randomly assigned to three dietary treatment groups T0, T1?and T2?each comprising 7 animals. A basal diet (T0) was formulated as per NRC (1998). Basal diet (T1) reduced crude protein by 10% with supplemental lysine identical in T0; while without supplemental lysine in T2?(that is, reduced protein by 10% and lysine by 15%). All the diets were iso-caloric and offered in phases according to change in body weight (10 to 20, 20 to 50, 50 to 80 and >80 kg). Growth performance, carcass parameters, meat composition and meat quality were evaluated at the end of the trial on four animals per group. The results show no significant difference on growth parameters and carcass and meat quality traits among the groups. Thus, it was concluded that the crude protein and lysine concentration can be reduced safely by 10 and 15%, respectively to that of NRC (1998) in diet of crossbred Landrace pigs without any compromise on performance during growing and fattening stage of production.
机译：本研究旨在评估饲喂低蛋白日粮添加或不添加赖氨酸以满足NRC（1998）对生猪生长性能，car体性状，肉成分和肉质的影响。对21头杂交种长白猪进行了126天的实验（平均体重11.72±0.57公斤，平均年龄7.59±0.14周）。将动物随机分为三个饮食治疗组T0，T1？和T2 ?，每组包括7只动物。根据NRC（1998）制定基本饮食（T0）。基础饮食（T1）使粗蛋白减少了10％，补充的赖氨酸与T0相同。而在T2？中不添加赖氨酸（即蛋白质减少10％，赖氨酸减少15％）。所有的饮食都是等热量的，并且根据体重的变化（10至20、20至50、50至80和> 80千克）分阶段提供。在试验结束时，对每组四只动物评估了生长性能，car体参数，肉组成和肉质。结果表明，各组之间的生长参数，car体和肉质性状没有显着差异。因此，得出的结论是，杂交种长白猪日粮中的粗蛋白和赖氨酸浓度可以安全地分别降低至NRC（1998）的10％和15％，而在生长和育肥阶段不影响其性能。

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