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关于生物固氮,近年不断有新的发现,其重要性正在重新认识。按照古典的分类,除共生菌(根瘤菌)与非共生菌群以外,被认为位置在两者之间的,也即处在稻等禾本科作物根的内外部,虽不形成根瘤,大概也通过共生而行氮素固定的,加之还发现在新几内亚生长的一种树的根上根瘤菌形成根瘤的例子,将来使禾本科作物的根上形成根瘤也不能断定是一个空想。又,施用氮肥时活力也不减弱的根瘤菌已培养出来,假使实际上利用也成功的话,进一步提高豆类的产量也是可能的。而且科学家也已提出这样的理
With regard to biological nitrogen fixation, there have been new discoveries in recent years and their importance is being re-recognized. According to the classical classification, in addition to commensal bacteria (Rhizobium) and non-symbiotic flora, is considered between the two, that is, in the rice and other root crops within and outside the root, although not the formation of nodules, probably Nitrogen fixation through symbiosis and, in addition, the discovery of rhizobia on the roots of one of the tree species grown in New Guinea can not be assumed to be utopian for the future to form nodules on the roots of gramineous crops. In addition, rhizobia strains that have not been weakened by application of nitrogen fertilizers have been cultivated, and it is also possible to further increase the yield of legumes if they are actually used successfully. And scientists have put forward such a theory