Abstract:

Feeding effects of cornstalk, alfalfa hay, Leymus chinensis and corn silage on the weight gain, feed efficiency and cost effectiveness of growing ewe were investigated. The 20 healthy growing ewes having similar weights and ages were selected and divided into four groups with different dietary, the ratio of concentrate to forage was 40:60. The results showed that compared with simply feeding cornstalk (100%), the daily gain of tested ewes feeding on alfalfa hay (50%) + Leymus chinensis (50%) increased by 11.11%, whereas feed conversion efficiency and income were not obvious increase. The daily gain of tested ewes feeding on Alfalfa hay (33.3%) + corn silage (33.3%) + Leymus chinensis (33.3%) increased by 30.72%, and the feed conversion efficiency increased by 18.16%. The daily gain of tested ewes feeding on alfalfa hay (50%) + corn silage (50%) increased by 83.01%, and the feed conversion efficiency increased by 40.74%. Considering the above indexes, the group of ewes feeding on the combination of "alfalfa hay (50%) + corn silage (50%)" had the highest daily gain, feed conversion efficiency and economic profits.

Key words: Forages, Dietary combination, Weight gain, Economic benefits

摘要：

为探讨饲喂苜蓿（Medicago sativa）干草、羊草（Leymus chinensis）和玉米（Zea mays）青贮与单纯饲喂玉米秸秆相比，对育成母羊增重、饲料转化效率和经济效益的影响。选取体重、年龄相近，健康的育成母羊20只，随机分成4组，每组5只，分别饲喂不同种类粗饲料日粮，精粗比为40：60。结果表明：与粗饲料单纯为玉米秸秆（100%）相比，苜蓿干草（50%）+羊草（50%）组日增重提高11.11%，饲料转化效率不明显，增收也不明显；苜蓿干草（33.3%）+玉米青贮（33.3%）+羊草（33.3%）组日增重可提高30.72%，饲料转化效率提高 18.16%，每天每只增收0.54 元；苜蓿干草（50%）+玉米青贮（50%）组日增重可提高83.01%，饲料转化效率提高 40.74%，每天每只增收可达1.91 元。表明，饲喂苜蓿干草（50%）+玉米青贮（50%）时，育成母羊增重、饲料转化效率、以及经济效益都能达到最好的状态。

关键词: 粗饲料, 日粮组成, 增重, 经济效益