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

施入磷肥后，土壤有效磷和全磷浓度增加。但是，当施肥量超过1m时，磷浓度没有变化。接种丛枝菌根真菌，即使不施磷肥，也可以避免作物缺磷，为促进作物生长提供了可能。以菜豆为例，供试真菌对苔藓球菌的促生长作用较大。以油菜豆为供试材料，阐明了接种5000个孢子后使用磷肥对当量菜豆的生长有促进作用。土壤环境不同，丛枝菌根真菌孢子繁殖率差异显著。

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.