本试验旨在研究杜洛克与鲁烟白(杜×鲁烟白)杂交断奶仔猪对可消化赖氨酸的需要量。首先,选取体重(35.00±1.25) kg的健康杜×鲁烟白杂交阉公猪6头,按照试验原料的不同配制成7种半纯合饲粮进行消化试验,获取饲料原料的回肠表观可消化氨基酸数据。然后,选择(35±2)日龄的杜×鲁烟白杂交断奶仔猪120头,公母各占1/2,平均体重(9.13±1.61) kg,按照饲粮可消化赖氨酸水平(0.90%、1.00%、1.10%、1.20%)分4个组,每个组6个重复(3个阉公猪圈、3个母猪圈),每个重复5头猪。结果表明:1)所有试验仔猪,0.90%、1.10%和1.20%组与1.00%组相比,料重比分别提高了13.24%(P<0.01)、4.24%(P>0.05)、11.32%(P<0.01);平均日增重分别降低了15.82%(P<0.01)、4.55%(P>0.05)、9.74%(P<0.01)。2)阉公猪和母猪,1.00%组平均日增重均显著高于0.90%和1.20%组(P<0.05),1.00%组平均日采食量均显著高于1.20%组(P<0.05);阉公猪,1.00%组料重比显著低于0.90%和1.20%组(P<0.05);母猪,料重比各组间差异不显著(P>0.05)。3)所有试验仔猪和其中母猪,1.00%组血清尿素氮含量显著低于1.20%组(P<0.05);所有试验仔猪和其中阉公猪、母猪,血清总蛋白含量各组间均差异不显著(P>0.05)。由结果可知,杜×鲁烟白杂交断奶仔猪(10~20 kg)可消化赖氨酸需要量为1.00%,性别因素对可消化赖氨酸需要量没有显著影响。
The purpose of this test was to study the digestible lysine requirement for Duroc?Luyan White hybrid weaner piglets. Firstly, six Duroc?Luyan White piglets with an average body weight of (35.00?1.25) kg were selected,and according to the variety of experiment materials, 7 kinds of semi-purified dietary were formulated, which used to determine the ileal apparent amino acid digestibility of feeds by digestion experiment. Secondly, a total of 120 Duroc?Luyan White hybrid weaner piglets (half barrows and half sows) at (35?2) days of age with an average initial body weight of (9.13?1.61) kg were used in this test. According to the results of previous test and the dietary digestible lysine levels (0.90%, 1.00%, 1.10% and 1.20%), the piglets were divided into 4 groups, and each group had 6 replicates (3 barrows sties and 3 sow sties) with 5 piglets each. The results showed as follows: 1) for all experimental piglets,compared with 1.00% group, the feed/gain (F/G) in 0.90%,1.10% and 1.20% groups was increased by 3.24% (P<0.01), 4.24% (P>0.05) and 11.32% (P<0.01), and average daily gain (ADG) was decreased by 15.82% (P<0.01), 4.55% (P>0.05) and 9.74% (P<0.01). 2) For barrows and sows, compared with 0.90% and 1.20% groups, ADG in 1.00% group was significantly increased (P<0.05). Compared with 1.20% group, average daily feed intake (ADFI) in 1.00% group was significantly increased (P<0.05). For barrows, the F/G in 1.00% group was lower than that in 0.90% and 1.20% groups, but there was no significant difference for sows (P>0.05). 3) For all experimental piglets and sows, serum urea nitrogen content in 1.00% group was significantly lower than that in 1.20% group (P<0.05). For all experimental piglets, barrows and sows, the plasma total protein content had no significant difference among all groups (P>0.05). The results show that the digestible lysine requirement for Duroc?Luyan White hybrid weaner piglets (10 to 20 kg) is 1.00%, and sex factor has no significant effect on digestible lysine requirement.
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