水土保持研究2012，Vol.19Issue(4)：284-288,5.
砂田砾石覆盖对土壤大孔隙特征及其土壤水文过程的影响研究进展
Research Progress on Influence of Mulching Gravel and Sand on Soil Macropore Characteristics and Soil Hydrological Process of Gravel-Sand Mulch Field
摘要
Abstract
Gravel-sand mulch field is a typical case of mulching gravel on land surface to retain water. Gravel- sand mulch field, as a kind of method to prevent drought, can reduce evaporation by artificially laying gravel to form a dry soil layer on soil surface. Soil macropore is the pore offering path for preferential flow. Mulching gravel has important influence on radii, quantity, connectivity and density of soil macropore. The study methods could be divided into two types, direct measurement and indirect description, and the suitability and limitation of the two methods were discussed. Because of the complexity of soil macropore and preferential flow formation cause, the experiments in laboratory should be combined with field trial, and observation techniques should be improved. The final aim of soil macropore research was to reduce groundwater contamination, control the loss of nutrient and water by regulating soil macropore. Mulching gravel can enhance soil macropore and thus facilitate precipitation infiltration and interflow and decrease runoff and evaporation. In that soil hydrological cycle process, its functions were changed respectively. In addition, some existent questions and research field of soil macropore were suggested for the future research关键词
砂田/砾石覆盖/大孔隙/土壤水文过程Key words
gravel-sand mulched field/mulching gravel/macropore/soil hydrological process分类
农业科技引用本文复制引用
余海龙,黄菊莹..砂田砾石覆盖对土壤大孔隙特征及其土壤水文过程的影响研究进展[J].水土保持研究,2012,19(4):284-288,5.基金项目
宁夏自然科学基金项目 （）
宁夏大学211重点学科建设项目“草业科学与生态工程子项目” （）
