根瘤菌能促使豆科作物和绿肥增产。豆科作物一生所需的(?)素的有2/3是根瘤中的根瘤菌从空气中固定下来的,平均667平方米豆科作物的根瘤能固定氮素3～12千克,相当于15～60千克硫酸铵或8～20担人粪尿的肥效。因此,接种根瘤菌是非常经济有效的增产措施,也是培肥土壤的好办法。 1.根瘤菌的制备 豆科作物开花时,在高产田选健壮植株连根挖起,洗净泥土,将主根和支根上大而饱满、粉红色的根瘤连根剪下,用60度白酒消毒5分钟,再用 Rhizobium can promote leguminous crops and green manure production. Legumes need two-thirds of their lifetime (?) Prime nodules rhizobia fixed from the air, with an average of 667 square meters of legume nodules can fix nitrogen 3 to 12 kg, which is equivalent to 15 ~ 60 kg of ammonium sulfate or 8 to 20 man-made urine. Therefore, inoculation Rhizobium is a very economical and effective stimulation measures, but also a good way to fertilize the soil. 1. Rhizobium Preparation Leguminous crops flowering, the election of high-yielding fields in the election robust plant roots dug up, wash the soil, the main root and branching large and plump, pink root nodules with roots cut, with 60 degrees liquor disinfection 5 minutes, reuse