Relationships between water-stable aggregates and nutrient status in black soil after reclamation

Abstract

Abstract: The study on the dynamics of water-stable aggregates in black soil after reclamation and its relation to soil nutrient status showed that the contents of soil water-stable aggregates decreased significantly at initial reclamation stage,but the declining became small with time. >0.25 mm water-stable aggregates had a significant correlation with soil organic C,total N,total P and CEC,the correlation coefficients being 0.7625,0.6794,0.6084 and 0.8134,respectively,and also had a significant correlation with soil exchangeable Ca,Mg,K and Na.A closer relationship of the aggregates was found with soil organic C and CEC than with other fertility properties,while no evident correlation was existed between the aggregates and soil total K,available P,available K and slow-release K.In order to maintain a good aggregate structure of black soil,it is of most importance to concern a proper balance of soil organic C.

Key words: Black soil, Water-stable aggregate, Nutrient status

CLC Number:

S181

YU Wantai, SHEN Shanmin, ZHANG Lu, MA Qiang, ZHAO Shaohua. Relationships between water-stable aggregates and nutrient status in black soil after reclamation[J]. Chinese Journal of Applied Ecology, 2004, (12): 2287-2291.

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