论文部分内容阅读
近年来,我国开始用飞机播种和人工种植豆科牧草来改良北方草原、南方草山和治理水土流失,播种用的豆科牧草主要有沙打旺、红三叶草、白三叶草和矮柱花草等。头两年,播种这些豆科牧草时都没有接种相应的根瘤菌。通过调查我们发现,这些豆科牧草的自然结瘤情况很差,根部根瘤很少、很小,有的甚至没有根瘤,植株地上部生长不良,必须接种相应的根瘤菌,才能提高种草的效益。
In recent years, China began to use aircraft seeding and artificial planting of leguminous pasture to improve the northern grassland, grassy mountains and the control of soil erosion, seeding legumes are mainly Astragalus, red clover, white clover and short column flowers. In the first two years, the rhizobia were not inoculated when these legumes were sown. Through the investigation, we found that the natural nodulation of these legume forages is very poor, the root nodules are few and small, and some do not even have nodules. The plants grow badly on the upper part and must be inoculated with the corresponding rhizobia in order to improve the efficiency of planting grass .