日粮精粗比与采光对湖羊羔羊育肥效果的影响

Effect of Light and Total Mixed Ratios with Different Concentrate to Forage Rations on the Hu Sheep Fattening

为探讨不同精粗比全混合日粮以及不同采光对湖羊断奶羔羊育肥效果以及经济效益的影响,试验选择舍饲饲养条件下生长发育良好、断奶体重无显著性差异的羔羊60只,采用二因素二水平试验设计,共设日粮精粗比(7:3、6:4)和采光方位(朝南圈舍、朝北圈舍)2个因子,随机分为4组,每组15只,组Ⅰ和组Ⅱ饲喂精粗比7:3日粮,组Ⅲ和组Ⅳ饲喂精粗比6:4日粮,组Ⅰ和组Ⅲ饲养在朝南圈舍中,组Ⅱ和组Ⅳ饲养在朝北圈舍中,进行预饲期15 d,正试期90 d的育肥试验。结果显示:结果显示:①采光方位均为朝南时,组Ⅰ供试羊平均体重显著高于组Ⅲ(P<0.05),饲料转化率和投入产出比分别提高15.22%和5.24%;②采光方位均为朝北时,组Ⅱ供试羊平均体重高于组Ⅳ,但组间差异不显著(P>0.05),饲料转化率和投入产出比分别提高16.74%和6.79%;③精粗比7:3处理组中,组Ⅰ平均日增重高、料重比低,投入产出比高14.88%;④精粗比6:4处理组中,组Ⅲ平均日增重和饲料转化率均比组Ⅳ高,投入产出比提高17.90%。结果表明:①在相同饲养环境下,精粗比7:3全混合日粮,羔羊生长发育较快,饲料转化率高,经济效益最好;②在相同日粮营养水平下,充足的阳光可加快羔羊生长,产生最佳经济效益。

The experiment was conducted to investigate the effect of light and different concentrate to forage ratios(C/F) of total mixed ratios on the fattening and economic benefit of weanling Hu lamb. A total of 60 Hu lambs with good growth and no significant difference in weaning weight were randomly assigned to four groups with 15 in each treatment. In this trial, tested sheep in different groups were fed with total mixed ratios, which were 7:3, 7:3, 6:4 and 6:4, respectively, and group Ⅰ and Ⅲ were reared in south facing enclosure, group Ⅱ and Ⅳ in north facing enclosure. The fattening test was carried out with the pre-test period 15 d and the test period 90 d. The results showed as follows: ①The groupⅠwere significantly higher than group Ⅲ in average daily gain(P< 0.05), the feed conversion ratio and input-output ration of groupⅠwere 15.65% and 5.65% respectively, which were higher than group Ⅲ. ② The average daily gain of group Ⅱ were higher than that of group Ⅳ(P> 0.05), the feed conversion ratio and input-output ration in group Ⅱ increased by 16.74% and 6.79%, respectively. ③ Compare with group Ⅱ, groupⅠwas 14.88% higher in input and output ratio, with the higher average daily gain, lower material weight ratio. ④ The average daily gain and feed conversion ratio of group Ⅲ were higher than group Ⅳ, and the input-output ratio in group Ⅲ increased by 17.90%. In all, the growth performance, feed conversion ratio and economic benefits of Hu lambs fed with the 7:3 C/F total mixed ratios were best under the same feeding condition. In addition, getting enough sunlight can speed up the Hu lamb growth and produce the best economic benefits under the same nutrition level.