Impact of Land Use and Soil Fertility on Distributions of Soil Aggregate Fractions and Some Nutrients

文献类型: 外文期刊

第一作者: Liu Xiao-Li

作者: Liu Xiao-Li;He Yuan-Qiu;Li Cheng-Liang;Zhou Jing;Zhang, H. L.;Schroder, J. K.;Zhang Zhi-Yong

作者机构:

关键词: fertility levels;land use types;red soil;water-stable aggregates

期刊名称:PEDOSPHERE ( 影响因子:3.911; 五年影响因子:4.814 )

ISSN: 1002-0160

年卷期: 2010 年 20 卷 5 期

页码:

收录情况: SCI

摘要: The size distribution of water-stable aggregates and the variability of organic C, N and P contents over aggregate size fractions were studied for orchard, upland, paddy, and grassland soils with high, medium, and low fertility levels. The results showed that > 5 mm aggregates in the cultivated upland and paddy soils were 44.0% and 32.0%, respectively, less than those in the un-tilled orchard soil. Organic C and soil N in different size aggregate fractions in orchard soil with high fertility were significantly higher than those of other land uses. However, the contents of soil P in different size aggregates were significantly greater in the paddy soil as compared to the other land uses. Soil organic C, N and P contents were higher in larger aggregates than those in smaller ones. The amount of water-stable aggregates was positively correlated to their contribution to soil organic C, N and P. For orchard and grassland soils, the > 5 mm aggregates made the greatest contribution to soil nutrients, while for upland soil, the 0.25-0.053 mm aggregates contributed the most to soil nutrients. Therefore, the land use with minimum disturbance was beneficial for the formation of a better soil structure. The dominant soil aggregates in different land use types determined the distribution of soil nutrients. Utilization efficiency of soil P could be improved by converting other land uses to the paddy soil.

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