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Updated: Aug 18, 2026

Combined Size and Density Fractionation of Soils for Investigations of Organo-Mineral Interactions
Published on: February 15, 2019
[Relationships between water-stable aggregates and nutrient status in black soil after reclamation]
Wantai Yu1, Shanmin Shen, Lu Zhang
1Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China. wtyu@iae.ac.cn
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, Na. A closer relationship of the aggregates was found with soil organic C and CEC than with other fertility properties, while no evident correlation 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.
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