摘要
以羔羊于青草期在亚高山草甸类草地进行了划区轮牧试验,试验羔羊分为四组,第Ⅰ、Ⅱ和Ⅲ组对草地牧草的利用率分别为40、50和60%,第Ⅳ组为对照,自由放牧。其结果表明,划区轮牧三组羔羊的增重分别比自由放牧提高52.16、47.15和41.62％(P<0.01),胴体重分别较自由放牧增加43.56、23.22和29.67％(P<0.05).通过实施划区轮牧,既能合理利用草地,又能提高放牧家畜的畜产品产量。亚高山草甸类草地四个月的青草期划区轮牧育肥羔羊,每只羊约需草地面积0.09～0.13ha.
Rotation grazing experiment on lambs was made on subalpine meadow at fresh grass period.The experimental lambs were divided into four groups.Utilization rate of grassland for group 1,2 and 3 was 40,50 and 60%,re- spectively.Lambs in group 4 grazed freely.The results showed that liveweight gain of lambs increased through rota- tion grazing.Compared with free grazing,liveweight gain of group 1,2 and 3 increased by 52,16,47.15 and 41.62%(P<0.01),resp.Cracass weight increased by 43.56,23.22 and 29.67%(P<0.05),resp.Through rotation grazing,the grassland is used effectively,while the animal products of pasture stock increased For grazing —fat lambs,each lamb could supplied with 0.09—0.13 ha grassland on subalpine meadow at fresh grass period of four months.
关键词
轮牧
羔羊
亚高山草甸
青草期
Rotation grazing
lambs
subalpine meadow
utilization rate of grassland
Fresh grass period
