接种菌根对根际微生物群落和磷营养的影响

EFFECT OF INOCULATED AM FUNGI ON MICROORGANISM AND PHOSPHORUS CONCENTRATION IN RHIZOSPHERE SOIL

以白三叶草和紫花苜蓿为供试植物,采用三室装置对不同接种处理的根际土壤微生物数量以及磷营养状况进行了研究。研究结果表明,接种混合菌根真菌的侵染率显著高于其他两种接种单一菌根真菌的处理。接种菌根对植物生长以及根际土壤微生物群落数量的促进作用均较为明显,三种接种处理植物之间的生物量差异不大,接种AM菌根促进了细菌和放线菌数量的增加,对真菌数量略有促进。接种菌根对根际土壤磷吸收有显著的促进作用,有利于植被的生长,为进一步的生态恢复与生物多样性研究奠定理论基础。

The effects of inoculated different AM fungi on microorganism population and phosphorus concentration in the rhizosphere soil. A three - compartment was used to study white clover and alfafa growth. The infection rate of mixture two mycorrihzal fungus were more than that of single - inoculated treatment obviously. The result indicated that the biomass of plants and the microorganism population were significantly increased by inoculated with AM fungio The different of plant bimass among inoculated AM were not clearo Bacteria and actinomycete populations were increased inoculated AM fungi, the fungal populations were changed only a littleo The phosphorus concentration in mycor - rhizosphere soil were lower than those of non - mycorrhizas evidently.