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首页> 美国卫生研究院文献>Asian-Australasian Journal of Animal Sciences >Determining of the Effect of Lysine:calorie Ratio on Growth Performance and Blood Urea Nitrogen of Growing Barrows and Gilts in Hot Season and Cool Season in a Commercial Environment
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Determining of the Effect of Lysine:calorie Ratio on Growth Performance and Blood Urea Nitrogen of Growing Barrows and Gilts in Hot Season and Cool Season in a Commercial Environment

机译：确定赖氨酸：热量比对商业环境中炎热季节和凉季生长的鲍鱼和母猪生长性能和血尿素氮的影响

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Two experiments were conducted to determine an optimum Lys:calorie ratio (g of total dietary Lys/Mcal of DE) for growing barrows and gilts in cool and hot seasons in a commercial environment. In Exp. 1, 96 barrows and 96 gilts were randomly allocated in 1 of 4 dietary treatments (2.7, 3.0, 3.3, 3.6 g of Lys/Mcal of DE). Each treatment had 12 replicate pens with 4 pigs per pen. The experiment lasted for 34 d in the cool season (March 12th to April 15th). Diets were based on corn-wheat-soybean meal. Lys:calorie ratio were attained by adjusting the amount of corn and soybean and supplementation of crystalline Lys. Total Lys intake and available Lys intake were increased (p<.05) as dietary Lys:calorie ratio increased. The BUN concentration on d 34 for barrows, and BUN change for barrows and gilts linearly increased (p<0.05) in response to increasing dietary Lys:calorie ratio. For gilts, back fat was decreased and then increased (Quadratically, p<0.05) as increasing dietary lys:calorie ratio. Exp. 2 had a similar design as Exp. 1 with the exception that Exp. 2 was conducted in hot season (June 30th to September 11th) for 42 d. Diet of Exp. 2 was the same as Exp. 1. Total Lys intake and available Lys intake increased (p<0.05) as dietary Lys:calorie increased. On d 42, the BUN concentration increased (p<0.05) in response to the increasing dietary Lys:calorie ratio. In conclusion, dietary Lys:calorie ratio of 2.7 g of Lys/Mcal of DE could satisfy the requirement of 25 to 50 kg growing pigs. Increasing dietary Lys:calorie ratio could increase BUN concentration in growing pigs.
机译：进行了两个实验，以确定在商业环境中凉爽和炎热季节生长的公猪和后备母猪的最佳Lys：热量比例（总膳食Lys / DE的Mcal）。在实验中在4种饮食疗法中的1种（2.7、3.0、3.3、3.6 g Lys / Mcal DE）中随机分配了1,96头公猪和96头小母猪。每个处理有12支重复笔，每支笔4头猪。该实验在凉爽的季节（3月12日至4月15日）持续了34 d。饮食以玉米-小麦-豆粕为基础。通过调节玉米和大豆的量并补充结晶的Lys可以达到Lys：热量的比率。随着饮食中Lys：卡路里比例的增加，总Lys摄入量和可用Lys摄入量增加（p <.05）。公猪在d 34时的BUN浓度以及公猪和小母猪的BUN变化随日粮中Lys：热量比的增加而线性增加（p <0.05）。对于后备母猪，随着饮食中lys：热量比的增加，后脂肪先减少后增加（通常，p <0.05）。经验2具有与Exp类似的设计。 1，除了Exp。 2在高温季节（6月30日至9月11日）进行了42 d。饮食饮食2与Exp相同。 1.随着饮食中Lys：热量的增加，总Lys摄入量和有效Lys摄入量增加（p <0.05）。在第42天，BUN浓度响应于饮食中Lys：热量比的增加而增加（p <0.05）。综上所述，日粮中Lys /卡路里的比例为2.7 g Lys / Mcal可以满足25至50 kg生长猪的需求。日粮中Lys：热量的比例增加可能会增加生长猪的BUN浓度。

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