Study on the water retention effect of compound soil of arsenic sandstone and sand under the condition of typical crop planting

3rd International Conference on Water Resource and Environment

地球科学;生态环境科学

Liu, S.Y.^1 ; Wang, N.^1 ; Xie, J.C.^1 ; Jiang, R.G.^1 ; Zhao, M.L.^1

State Key Laboratory Base of Eco-hydraulic Engineering in Arid Area, Xi'An University of Technology, Xi'an

710048, China^1

关键词: Coefficient of variation;    Development and utilizations;    Prevention and controls;    Soil water retention;    Spatial and temporal variation;    Variation coefficient;    Water distributions;    Water-retaining agents;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/82/1/012089/pdf
DOI  :  10.1088/1755-1315/82/1/012089

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Arsenic sandstone is the main reason of soil erosion in the Mu Us Sandy Land, simultaneously was proved to be a kind of good water retaining agent. In order to provide references for the utilization of water and soil resources and the prevention and control of desertification and soil erosion of the southern margin of Mu Us Sandy Land, on the basis of earlier studies the farmland experiments of compound soil with three ratios of 1:1, 1:2 and 1:5 between arsenic sandstone and sand under maize planting patterns were designed, whose experimental process was divided into six stages according to the crop growth status. The results showed that the soil moisture content was highest in the layer of 0∼40cm where the compound soil mainly concentrated in, which was related to the potent water retention of arsenic sandstone and strong water permeability of undisturbed sandy soil. The variation coefficients in the soil of 1:1 and 1:2 were more stable and evenly distributed. The compound soil can effectively improve the soil water retention capacity, and prolong the storage time of soil water. Among them, water loss rate in soil of 1:1 and 1:2 were lower. The coefficient of variation also confirms that the water distributions of the two types of soil were more uniform and stable. Besides illustrating the effects of the soil amelioration measures on spatial and temporal variation of soil moisture content and the improvement of soil water regime, the study provides some references for the development and utilization of agriculture in Mu Us Sandy Land.