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在许多情况下,当豆科植物具有侵染性和有效性的根瘤菌时,就可少用或不用氮素化肥。然而,提供豆科植物以具有侵染性和有效性的根瘤菌常常不是容易的事。近100年来的接种经验可以概括为以下两句话:①当豆科植物播种在没有适当的根瘤菌存在的土壤中时,接种通常会促进豆科植物的生长。②当豆科植物播种的土壤本身己具有能结瘤的土著根瘤菌时,人工接种能否促进植物生长,这主要取决于影响人工接种菌系和土著菌系相互竞争的多种因素。
In many cases, nitrogenous fertilizers can be used less or not when leguminous plants are infested and effective rhizobia. However, it is often not easy to provide rhizobia of inflorescences and availability to leguminous plants. Vaccination experience over the past 100 years can be summarized in the following two sentences: ① When leguminous plants are sown in soils that do not have the proper rhizobial presence, inoculation usually promotes the growth of leguminous plants. (2) Whether the artificial inoculation can promote the growth of plants when soil planted by leguminous plants themselves have nodulated indigenous rhizobia depends on many factors that affect the competition between artificial inoculation and indigenous strains.