Effect of Rice-Based Cropping System on Organic Matter Status in SoilsEnglish Full Text

XIAO YONGLAN; ZHANG YANGZHU; HU RUIZHI; HUANG YUNXIANG; ZHOUQING; YUAN ZHENGPING( Department of Natural Resources, Hunan Agricultural University, Changsha 410128 (China)) YANG DONGPING( Soil and Fertilizer Center of Northern District of Yueyang Municipali

Abstract: A long-term simulation experiment was carried out to study the effect of rice-based cropping system,green manure and ground-water level on soil organic matter. Soil organic matter content increased when upland soil was puddled and cropped under submerged conditions. Among all treatments, soil organic matter contents in the treatments of rice-rice-flooded fallow in winter （WF） were the highest, those in the treatments of rice-rice-astragalus （WG） came the second, and those in the treatments of rice-rice-rape （WR）were the lowest. At the same rate of green manure application, the degrees of organo-mineral complexing in soils of treatments WG and WR were higher than those of treatment WF. After 9-year rice cultivation, the state of combination of humus in heavy fraction varied with treatments. The relative content of loosely bonded humus decreased in the order of WR ＞ WG ＞ WF, and it correlated significantly with Se availability.

Keywords：

degree of organo-mineral complexing; organic matter; rice-based cropping system; Se availability;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S154

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Effect of Rice-Based Cropping System on Organic Matter Status in SoilsEnglish Full Text

XIAO YONGLAN; ZHANG YANGZHU; HU RUIZHI; HUANG YUNXIANG; ZHOUQING; YUAN ZHENGPING( Department of Natural Resources, Hunan Agricultural University, Changsha 410128 (China)) YANG DONGPING( Soil and Fertilizer Center of Northern District of Yueyang Municipali

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