杉木人工林不同发育阶段根际与非根际土壤微生物变化趋势

Abstract

Abstract:

The isolations of soil microorganism in different developing stages of the Chinese fir plantation were investigated. It was found that the amounts of rhizosphere bacteria and the bacteria in juvenile and mature stands were higher than those of non-rhizosphere and the bacteria in medium stands.The amounts of actinomycetes have no significant change among rhizosphere and non-rhizosphere soils.The isolations were more abundant in juvenile and maturestands than that in medium stands in which only Albosporus, Flavus, Griseofuscus were found. The amounts of fungi significantly declined from juvenile to medium stands and increased to mature stands. The percentage of Penicillium in medium rhizosphere soil is higher than those in the juvenile and mature stands. The results suggested that the comparison of the rhizosphere and non-rhizosphere soils is useful to show the relationship between the change of soil characters and the Chinese fir growth, controlling soil degradation and improving production of the plantation.

Key words: Chinese fir plantation, Developing stage, Microorganism of rhizosphere, Soil microorganism

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THE CHANGES OF THE SOIL MICROORGANISM IN RHIZOSPHERE AND OUTSIDE IN DIFFERENT DEVELOPING STAGES OF THE CHINESE FIR PLANTATION

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