长白×北京黑F_1代猪适宜粗蛋白与赖氨酸、粗蛋白比的研究  

Study of the optimum Ratio of Crude Protein to Lysine for Landrace x Beijing Black crossbred F1 Pigs

作　　者：罗绪刚[1] 杨胜[2] 李德发[2] 张晔[2] 

机构地区：[1]中国农科院畜牧所 [2]北京农业大学

出　　处：《中国畜牧杂志》1989年第1期9-12,共4页Chinese Journal of Animal Science

摘　　要：用2个蛋白水平和2个赖蛋比值作2×2析因设计,将32头始重25公斤的长白×北黑F_1代猪随机分成4组,每组8头,进行饲养试验;将16头阉公猪也分为4组,每组4头,进行N—平衡试验,研究了以玉米—豆饼为基础的饲粮蛋白质和赖蛋比水平对猪在20—60公斤和60—90公斤两个体重阶段的生产性能,氮沉积和90公斤时胴体品质的影响。粗蛋白由16—14％降至14—12％时极显著降低了胴体瘦肉率、背最长肌蛋白含量和日氮沉积量,提高了背膘厚,对增重和饲料效率等无明显影响。赖蛋比4.5—4.5％提高到5.0—4.5％,除降低 日采食量、增重和屠宰率(P<0.05)外,对其余指标均无影响。本试验结果表明:长×北F_1代瘦肉猪饲粮适宜粗蛋白为16—14％,赖蛋比为4.5—4.5％。A feeding trial and a N balance trial were conducted with 32 weanling crossbred pigs (16 males+ 16 females) of 25 kg average initial weight and 16 weanling barrows in a 2 x 2 factorial arrangement of treatments involving two crude protein levels and two Lysine/protein ratios. Observations on growth and N retention were made during the periods of 20-60 and 60-90 kg body weight. Carcass characteristics at 90 kg bodyweight were also observed. Lean percentage and the Longissimus muscle protein content were higher (P<.01) with high protein than low protein diets.The effects on carcass fat and backfat were opposite (P<.01) . There was no effect of dietary protein level on daily gain and feed conversion (P>.05) . No effect of lysine/protein ratio was observed on other criteria except the reduced daily gain, daily intake and dressing percentage with the increasing lysine/protein ratios (P<.05) . The results suggested that a dietary protein level of 16-14% with a lysine/protein ratio of 4.5% might be required for the cross-bred lean type pigs.

关 键 词：猪 饲料 粗蛋白 赖氨酸 

分 类 号：S828.5[农业科学—畜牧学]