The possibility of phosphorus concentration reduction of the soil by the arbuscular mycorrhizal fungi and substitution as a phosphorus fertilizer

施用磷肥后，田间土壤有效磷和全磷浓度升高。但是，当距施用磷肥超过1m时，磷的浓度没有变化。接种丛枝菌根真菌，即使不施用磷肥，也可避免作物缺磷，并可明确其促进生长的作用。以大豆为例，苔藓球囊菌对供试真菌的促生作用较大。澄清了以甘油三酯（Glomus mosseac）作为芸豆样品，在接种5000孢子时施用磷肥促进等量芸豆生长的情况。丛枝菌根真菌孢子的繁殖比例因土壤环境的不同而有显著差异。

Availability phosphorus and total phosphorus concentration of the field soil heightened, when the phosphorus fertilizer was used. But, the phosphoric concentration did not change, when over 1m is left from the application placement phosphorus fertilizer. The phosphorus lack of the crop could be avoided, even if the phosphorus fertilizer is not used, when the arbuscular mycorrhizal fungus is inoculated, and that to promote the growth was possible clarified. In case of the bean, the growth-promoting effect of Glomus mosseae was big in offered fungus. That the case in which the phosphorus fertilizer was used, when 5000 spores were inoculated, and growth of the equivalent kidney bean were promoted clarified, when Glomus mosseac was offered to the kidney bean as sample. That the breeding ratio of the arbuscular mycorrhizal fungi spore remarkably differed by the difference between soil environment cleared.