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为了增加高寒地区放牧家畜的优质饲草供应,于2013年在海拔4 600 m的西藏羊八井牧区对5种一年生牧草进行了引种试验,采用随机区组设计测定了牧草生长高度、产草量、营养成分。结果表明:小黑麦(×Triticosecale Wittmack)和青引2号燕麦(Avena sativa L.cv.Qingyin No.2)的牧草高度和产量显著高于其他牧草(P<0.05),青稞昆仑13(Hordeum vulgare L.cv.Kunlun No.13)和青海甜燕麦(Avena sativa L.cv.Qinghai)的牧草产量显著高于青稞北青3(Hordeum vulgare L.cv.Beiqing No.3)(P<0.05);小黑麦的粗蛋白含量显著低于其他牧草(P<0.05),而中性洗涤纤维含量显著高于其他牧草(P<0.05)。根据牧草产量和品质性状的聚类分析,在西藏羊八井适宜种植小黑麦、青引2号燕麦、青稞昆仑13和青海甜燕麦(A.sativa)。
In order to increase the quality of forage supply for grazing livestock in alpine regions, five annual grasses were introduced in 2013 in Yangbajing pasture at an elevation of 4 600 m. Randomly-designed groups were used to determine the forage growth, ,nutrient content. The results showed that the forage height and yield of × Triticosecale Wittmack and Avena sativa L.cv.Qingyin No.2 were significantly higher than those of other herds (P <0.05). Hordeum Vulgare L.cv. Kunlun No.13) and Qinghai sweet oats (Avena sativa L. cv.Qinghai) were significantly higher than those of Hordeum vulgare L.cv.Beiqing No.3 (P <0.05) ; Triticale crude protein content was significantly lower than other forage (P <0.05), while the neutral detergent fiber content was significantly higher than other forage (P <0.05). According to the cluster analysis of pasture yield and quality traits, triticale, Qingyou No.2 oats, Kurala highland Kunlun 13 and A. sativa were planted in Yangbajing, Tibet.