摘要
在实验和对比分析的基础上 ,讨论了黄土善土结皮的一些主要物理化学性质特征。结果认为 ,结皮的形成是以细砂和粗粉砂为骨架 ,以小于 0 .0 1mm的细小颗粒填塞土壤空隙的一个物理过程 ,其腐殖质含量几乎与土壤相同 ,而碳酸钙含量则略低。结皮的坚实度与前期含水率呈负相关 ,与容重和厚度呈正相关 。
Based on experiments and comparing analysis, the physicochemical characteristics of crust above the loess soil is discussed mainly, and some results were obtained. Crust formation is a physical process that the framework formed by fine sand and coarse silt is filled by small grain(<0.01 mm). The content of humus is nearly same as that of soil while the content of CaCO 3 is slightly lower. Crust hardness has negative relation with the water content of earlier stage, and has positive relation with bulk density and thickness. The relation of bulk density and thickness is more complicated.
出处
《水土保持通报》
CSCD
北大核心
2001年第4期22-24,共3页
Bulletin of Soil and Water Conservation
基金
国家科技攻关项目"高原台塬过渡区高产型粮果林发展研究 (96- 0 4- 0 5- 0 7)
关键词
土壤结皮
物理化学性质
坡耕地
soil crust
physicochemical property
slope farmland
