Soil Quality Analysis in Newly Increased Cultivated Land

3rd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Liu, Zhe^1^2^3^4 ; Wang, Huanyuan^1^2^3^4

Shaanxi Provincial Land Engineering Construction Group Co., Ltd, Xi'an

710075, China^1

Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an

710075, China^2

Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an

710075, China^3

Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi'an

710075, China^4

关键词: Available phosphorus;    Available potassiums;    Heavy metal contents;    Irrigation water quality;    Nutrient elements;    Organic fertilizers;    Physical chemical property;    Saturated hydraulic conductivity;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/300/2/022120/pdf
DOI  :  10.1088/1755-1315/300/2/022120

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In order to explore soil physical-chemical properties and water quality in Bailiang town, Heyang county of Shaanxi Province, the soil physical-chemical properties of newly increased cultivated land, the water heavy metal contents of chromium, copper, zinc, arsenic, selenium, cadmium, mercury and lead of Yellow River water and groundwater in the project area were measured. The results showed that the pH value, total salt content and heavy metal content of the Yellow River and groundwater were all in line with the farmland irrigation water quality Standard, which could guarantee irrigation use. The type of soil in the 0∼30 cm was sandy loam, the bulk density of 0∼30 cm soil layer was 1.52 g cm-3, and the saturated hydraulic conductivity was 229.41 cm d-1, which could meet the needs of planting soil quality requirements, but sandy loam soil with large saturated water conductivity was easy to leak water and fertilizer. Meanwhile, the content of exchangeable calcium of 0∼30 cm soil layer was in a very rich state(38.6∼90.1 cmol kg -1), and the content of available potassium (36∼128 mg kg-1)and effective boron(0.56∼0.89 mg kg-1)were moderate, the content of organic matter(1.06∼2.65 g kg-1), total nitrogen(0.18∼0.33 g kg-1), available phosphorus(3.2∼8.4 mg kg-1) and available silicon content(41.0∼68.6 mg kg-1)were in a state of lack. These results indicate that the organic fertilizer, green manure, straw and small amounts of fertilizer could be used to increase the content of organic matter, and other nutrient elements in the cultivated layer. It was recommended to design the loess tillage layer and plow pan layer, which played the role of water retention and fertilizer retention, and was suitable for the growth of aquatic crops.