Effects of Arbuscular Mycorrhizal Fungi on Leymus chinensis Growth and Soil Carbon
The grass with inoculation in field trial was conducted in Xilingele grassland in Inner Mongolia, which studied the effects of Glomus mosseae and Glomus claroidium on growth of Leymus chinensis ,a dominant species in Inner Mongolia steppe, with or without soil sterilization treatments. The results showed that there was no significant impact on the shoot biomass of L. chinensis with arbuscular mycorrhizal fungi. However, inoculation in non-sterilized soil significantly increased L. chinensis roots biomass. And G. mosseae inoculation significantly increased the plant aboveground N, P content and uptake, efficiently improved the plant N and P nutrition and forage quality. Two kinds of fungal inoculums had different effects on root nutrient absorption. G. mosseae significantly increased N,P of root uptake both in sterilized and natural soil. G. claroidium only increased N, P of root uptake in non-sterilized soil. There was no significant impact on hyphal length density with inoculation. However,there was an increasing trend for microbial biomass carbon in soil after inoculation. And it was difficult to observe the impact on soil organic carbon with inoculation in a short term. Therefore, arbuscular mycorrhizal fungi could improve the grass N,P uptake, promote growth and forage quality,and boost up microbial biomass carbon in soil.
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万方数据
维普
