水稻土的水理性质与土壤耕作的关系
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THE PHYSICAL BEHAVIORS OF SOIL-WATER SYSTEM OF PADDY SOIL IN RELATION TO TILLAGE
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    摘要:

    最近的研究工作证明[10,13,18]生长与土壤物理环境有密切关系.一般水稻土有水、旱两作过程,土壤随着淹水、排水和落干的变化相应地发生膨胀、分散、凝聚和收缩.水稻土的物理环境不是固定不变的.

    Abstract:

    The present paper deals with the morphological characteristics of soil structure and their relations to shringkage and swelling. Four paddy soils used in the study were collected from Taihu lake region. The content of clay in the soils ranged from 20-40%. Plough layer and plowpan of clayey paddy soil are characterized by puddling and compactness. Weathering may advance the formation of structural pores of the soil. There are internal relations between behaviors of soil shrinkage and swelling and regime of soil structure. There are three shrinkage stages of a clyey soil clod in the drying process, i. e., structural shrin-kage, normal shringkage and residual shrinkage. The ratios of tre change of soil volume to volume of water lost from soil in the three stages are <1,1 and <1 respectively. When structure of clod is destroyed, the structural shrinkage disappears and normal shrinkage develops. Therefore the characteristics of soil shrinkage can reflect the regime of soil structure.

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赵诚斋,赵渭生.水稻土的水理性质与土壤耕作的关系[J].土壤学报,1983,20(2):140-153. Zhao Chengzhai, Zhao Weisheng. THE PHYSICAL BEHAVIORS OF SOIL-WATER SYSTEM OF PADDY SOIL IN RELATION TO TILLAGE[J]. Acta Pedologica Sinica,1983,20(2):140-153.

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  • 在线发布日期: 2013-02-25
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