Study on the Activation of Trace Nutrient Elements in Soil by Freeze-thaw Action

4th Annual International Workshop on Materials Science and Engineering

Shi, Lei^1,2,3,4 ; Liu, Jinbao^1,2,3,4 ; Kong, Hui^1,2,3,4

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

710075, China^1

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

710075, China^2

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

710075, China^3

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

710075, China^4

关键词: Freeze thaw actions;    Freezing and thawing cycle;    Freezing temperatures;    Freezing thawing cycles;    Mechanism of action;    Peroxidase activities;    Phosphorus contents;    Total nitrogen content;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012035/pdf
DOI  :  10.1088/1757-899X/381/1/012035

来源: IOP

【 摘 要 】

In order to explore the mechanism of action that the freezing-thawing cycle times and freezing temperature to the nutrient forms and enzyme activity of zonal soil (Lou soil, feldspathic sandstone), using indoor freezer to simulate different freezing temperature (20 °C intense frozen and - 10 °C weak frozen), with different freezing and thawing cycles (onece and twice). The results shows that the total nitrogen content of the two samples of the freeze-thaw cycle increases, and the increment trend of feldspathic sandstone is more pronounced than Lou soil's; The increase of potassium content in Lou soil and feldspathic sandstone is 4.7% and 5.3% respectively compared with that before frozen. The effective phosphorus content of 2 kinds of soil in freezing-thawing cycle decreases, and the reducing trend of Lou soil is more pornounced than feldspathic sandstone's. The peroxidase activity was enhanced by freezing-thawing cycle; however, the activity of urease was decreased. The effect of freezing temperature on the active nutrient and enzyme activity of tillage soil is not significant.