Land quality evaluation based on sustainable development for gully erosion control and land consolidation project of Yan' an, China

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Wang, Jing^1,2 ; Han, Jichang^1 ; Zhang, Yang^1 ; Du, Yichun^1 ; Bai, Qingjun^2

Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Land and Resources, Xi'an

710075, China^1

Institute of Water Resources and Hydro-Electric Engineering, Xi'An University of Technology, Xi'an

710048, China^2

关键词: Available nutrients;    Comprehensive evaluation;    Correlation coefficient method;    Evaluation objects;    Land consolidations;    Performance evaluations;    Soil physical and chemical properties;    Soil quality evaluation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032026/pdf
DOI  :  10.1088/1755-1315/108/3/032026

来源: IOP

【 摘 要 】

Based on the three land consolidation projects in Yan'an region, the differentiation of the soil capacity, texture, available nutrients, pH etc before and after land consolidation were analyzed, and a comprehensive evaluation of soil quality before and after consolidation was done in this study. The results show that: (1) After the gully-land consolidation, the soil capacity, nitrogen, available P, available K and conductivity are increased, while the organic matter and pH are decreased. With one-year's cultivation, the soil capacity decreased and the organic matter increased. After the slope-land consolidation, the soil physical and chemical properties have similar trends with the gullies, but the change is more significant. (2)No matter for gully or slope, the soil quality declines where the land just get consolidated, and the slope has more significant declining. With one-year's cultivation, the soil quality of the gully has more rapid recovery with one grade uplift. (3) The correlation coefficient method was used to give a comprehensive evaluation of the soil quality, to considerate of the changes of the coefficients of the factors and the evaluation object. The evaluation can well reflect the actual situation of the soil quality, give reference to the soil quality evaluation for consolidated land, and the results may provide basis for the performance evaluation of the Yan'an land consolidation projects.