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豆类幼苗期根上根瘤菌很少,固氮能力也很弱,如播种前用根瘤菌剂拌种,便能提高小苗根部根瘤菌的数量和固氮能力,起到增产的效果。尤其是未种过豆类作物的地块、新垦荒地或地力瘠薄的地块首次种豆科蔬菜时,接种根瘤菌就显得很有必要,增产的效果也很显著。具体做法是: 1.在上年拔起的豆株上的老根中,选根瘤多而大的根株,剪下其细根和根瘤
Rhizobium on the root stage of legumes had few rhizobia and its ability of nitrogen fixation was very weak. For example, seed dressing with rhizobia before sowing could increase the number of root rhizobia and nitrogen fixing ability of seedlings, and increase yield. In particular, not the plots of legumes, land reclamation wasteland or barren land plots of the first species of legumes, inoculated Rhizobia is necessary, the effect of increasing yield is also significant. The specific approach is: 1. In the previous year, the root of the bean stalks uprooted, root nodules large and large roots, cut its fine roots and nodules