Research on Soil Properties of Grass Land in the Loess Plateau

Jia Henyi; Peng Xianglin; Mu Xinming; Yong Shaoping; Cheng Jiming

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Research on Soil Properties of Grass Land in the Loess Plateau

- Research on Soil Properties of Grass Land in the Loess Plateau
- Bulletin of Soiland Water Conservation Vol. 12, Issue 4, Pages: 20-25(1993)
- 作者机构：
  
  中国科学院、水利部西北水土保持研究所陕西杨陵.,712100
- 作者简介：
- 基金信息：
- DOI：
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- Published：1993
- 稿件说明：
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Jia Henyi, Peng Xianglin, Mu Xinming, et al. Research on Soil Properties of Grass Land in the Loess Plateau[J]. Bulletin of Soiland Water Conservation, 1993, 12(4): 20-25.
DOI：

Jia Henyi, Peng Xianglin, Mu Xinming, et al. Research on Soil Properties of Grass Land in the Loess Plateau[J]. Bulletin of Soiland Water Conservation, 1993, 12(4): 20-25. DOI：

摘要

黄土高原草地土壤的颗粒组成受草地盖度、产量的影响较小

主要受土壤地带性分布的影响。草地土壤的容重、总孔隙度受草地植物的盖度、产量的影响。盖度、产量低时

土壤容重≥1.20g/cm~3

总孔隙度在55.0%左右;盖度、产量高时

土壤容重≤1.20g/cm~3

总孔隙度≥60.0%。草地土壤的三相比:植物盖度、产量低时为1∶0.10～0.19∶0.60～0.90

反之则为1∶0.33～0.75∶1.15～1.76。土壤物理性质与草地枯枝落叶层

土壤有机质含量有密切关系。草地土壤的物理性质和植物根系密度是改善土壤水力学特征、强化土壤抗冲性、土壤入渗性能和斜坡稳定性增值的关键所在。

Abstract

The soil particle composition of grassland is affected slightly by the cover-degree and yield of grass in the loess Plateau.It is mainly affected by the distribution of soil zonality of soil zonality.The volume weighet and total porosity of grassland are affected by the cover-degree and yield of grass.When the cover-degree and yield are low

the soil volume weight is greater than or equal to 1.20g/cm2and the soil tatal porosity is around 55%;with the increase in them

the soil volume weight will become less than or equal to 1.20g/cm2 and soil total porosity become greater than or equal to 50%.When the cover-degree and yield are low

there phase ratio of solid

liquid and gas for grassland is 1∶0.10～0.19∶0.60～0.90;conversely

that raito become 1∶0.33～0.75∶1.15～1.76.The soil physical properties of grassland are correlated with litter layer and content of soil organic matter.The soil physical properties and the density of root system are keys to improve characteristics of soil hydraulics

to strength soil anti-scaurability and infiltraion

and to increase slope stability.

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