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一、几种豆科牧草自然结瘤情况调查国外畜牧业比较发达的国家播种豆科牧草时,普遍进行根瘤菌接种,特别是在生荒地或是前茬没有种植过豆科植物的土地上播种豆科牧草时,接种根瘤菌能明显提高牧草的产量。近年来,我国飞机播种和人工种植的豆科牧草种类主要有沙打旺、红三叶草、白三叶草、矮柱花草和链荚豆等。头两年,播种这些豆科牧草时没有接种相应的根瘤菌,我们从1981年开始到内蒙、河北、贵州等省(区)进行调查,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,有效根瘤不多,有的甚至没有根瘤。通过调查得出结论:在生荒地和没有种植过豆科植物的地方播种沙打旺、红三叶草、白
First, the natural nodulation of several leguminous forages Survey In more developed countries in foreign countries when planting legumes, widespread Rhizobium inoculation, especially in the heathland or previous crop is not planted on the land of legumes sown Leguminous pasture, rhizobia inoculation can significantly improve pasture production. In recent years, China’s aircraft seeding and artificial cultivation of leguminous forage species are mainly Astragalus, red clover, white clover, short column flowers and chain beans and other pods. In the first two years, the rhizobia were not inoculated when these legumes were sown. From 1981 onward, we conducted investigations in Inner Mongolia, Hebei and Guizhou provinces and found that the natural nodulation of these legumes was poor. Root nodules rarely, very small, effective root nodules, and some do not even nodules. Through the investigation, it was concluded that sow thistle, red clover, white clover and white clover were sowed in places where heaths and legumes were not planted