饲粮菜籽粕水平对青年母猪繁殖性能的影响

48头浙江中白后备母猪按窝别、体重分成4组,在6～8月龄和配种后至第二胎分娩后20天期间,分别饲喂菜籽粕(含硫代葡萄糖苷 3.7mg/g)替代饲粮中豆饼蛋白质0、25、50和75％的4种后备母猪饲粮和繁殖母猪饲粮,以研究饲粮菜籽粕水平对青年母猪繁殖性能的影响。结果表明,饲粮菜籽粕水平对母猪采食量、初孕年龄、头胎断奶至第二胎怀孕间隔时间、一次情期受胎率、平均妊娠天数、总产仔数、产活仔数、仔猪初生重、60日龄育成数、后备母猪日增重和饲料报酬均无显著影响(P>0.05),但母猪初孕年龄和断奶再怀孕间隔时间有随饲粮菜籽粕水平增高而延长的趋势,产活仔数和育成仔数有下降趋势。后备母猪增重成绩以25％菜籽粕替代组较优。仔猪20和60日龄平均体重菜籽粕组显著低于豆饼对照组(P<0.05),60日龄平均体重,50％菜籽粕替代组显著低于25％替代组(P<0.05)。由此可见,母猪饲粮中菜籽粕用量,按补充蛋白质计,以不超过25％为宜。

THE EFFECTS OF DIETS CONTAINING DIFFERENT LEVELS OF RAPESEED MEAL ON REPRODUCTIVE PERFORMANCE OF GILTS

Fourty-eight Zhejiang Middle White gilts were fed from about 6-months of age to 20th day postpartum of second parity on diets containing 0,25,50,75% rapeseed meal (RM) supplement protein and 100,75,50,25% soybean meal supplement protein, respectively, to determine the effects of diets containing different levels of RM on reproductive performance of gilts. In the dam fed on diets containing RM, the mean piglet weights at 20-days and 60-days of age were significantly less than that in control group (P<0.05). With increasing RM content in gilt rations there was a tendency that the age at first conception of gilts delayed, the interval between weaning and conception lengthened, the number of piglets born alive and weaned at 60-days of age decreased, the mean live weights of piglets at 60-days of age declined. It is recommended that not more than 25% conventional RM supplement protein should be used in diets of gilts during pre-gastation, gastation and lactation.