丛枝菌根化滨梅苗的根际微生态环境

doi:10.11707/j.1001-7488.20140107

Abstract

Abstract:

A greenhouse pot experiment was conducted to investigate the impact of AM fungi inoculation on the soil micro-eco in the rhizosphere of beach plum (Prunus maritima) seedlings. We selected three species of AM fungi, Glomus mosseae, G. etunicatum, and G. diaphanum, to infect the seedlings, and determined the infection rate of AM fungi, plant biomass, number of microorganisms in the rhizosphere, soil pH, enzyme activity of soil, N and P nutrients in the rhizosphere. The results showed that the all three AM fungi formed mycorrhizal compound with the host plant. G. mosseae and G. etunicatum had higher infection rate than G. diaphanum, and their infection rates were 50.4% and 48.3%, respectively. The biomass of seedlings infected by the two AM fungi was 1.74 and 1.73 times of the control, respectively. AM mycorrhizae impacted microbial populations around the roots, and the number of bacteria, actinomycetes and nitrogen-fixing bacteria on the root surface increased significantly. AM fungi accelerated the activities of phosphatase, urease, and proteinase in soil rhizosphere, and the activities of these enzymes were positively correlated with the infection rate of AM fungi. AM fungi decreased the pH value of rhizosphere, and the pH value was correlated with the infection rate of AM fungi negatively. The available N and P were accumulated in the rhizosphere of the seedlings inoculated with AM fungi, and the accumulation was correlated with the infection rate of AM fungi remarkably. Among the three Glomus species, G. mosseae and G. etunicatum were more effective. In summary, AM formation improved the micro-ecological environment of beach plum seedlings and increased soil fertility in the rhizosphere, but the ecological effects varied dependent on the species of AM fungi.

Key words: AM fungi, beach plum, rhizospheric soil, microbe, enzyme activity of soil, pH, soil nutrient

CLC Number:

S714.2

Zai Xueming, Hao Zhenping, Zhao Hui, Qin Pei. Rhizospheric Niche of Beach Plum Seedlings Colonized by Arbuscular Mycorrhizal Fungi[J]. Scientia Silvae Sinicae, 2014, 50(1): 41-48.

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Rhizospheric Niche of Beach Plum Seedlings Colonized by Arbuscular Mycorrhizal Fungi

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