Soil P availability in larch rhizosphere

Abstract

Abstract: Soil samples were collected from the rhizosphere, non rhizosphere of larch(Larix gmelini) stand by exfoliation method,, the variation of P concentration was analyzed. The results show that there was no significant difference between total P concentrations in the rhizosphere, the non-rhizosphere soil,while the concentration of available P in rizhosphere soil was significantly higher than that in the non-rhizosphere soil.The concentrations of available P in rhizosphere 12 years old, 40 years old larch rhizosphered by 12.6%, 23.4% respectively,indicating that larch roots had the effect of mobilizing soil phosphorus.The components of inorganic P in rhizospheric soil were different from those in non-rhizospheric soil.The concentration of O-P was lower,and the concentrations of Al-P,Fe-P,Ca-P,NH₄Cl-P were higher in the rhizosphere.The pH of rhizospheric soil was lower than that of non-rhizospheric soil,but no further acidification was observed.There was no close relationship between pH variation, available P concentration in larch rhizosphere.

CLC Number:

S714.8

ZHANG Yandong, BAI Shangbin, WANG Zhengquan, WANG Qingcheng . Soil P availability in larch rhizosphere[J]. Chinese Journal of Applied Ecology, 2001, (1): 31-34.

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