Optimum Management of Water and Fertilizer for Potato in Soft Rock and Sand Compound Soil Based on WHCNS Model: Model Calibration and Validation

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Wang, Huanyuan^1 ; Cheng, Jie^1 ; Zhao, Haiou^1 ; Wang, Zhao^1

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

710075, China^1

关键词: Carbon and nitrogen;    Coupling effect;    Fertilizer use;    Field experiment;    Model calibration and validation;    N use efficiency;    Water drainage;    Water use efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022170/pdf
DOI  :  10.1088/1755-1315/170/2/022170

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Soil Water Heat Carbon and Nitrogen Simulator (WHCNS) model was used to simulate the soil water and fertilizer coupling effect of potato in soft rock and sand compound soil, with a view to establishing a scheme to optimize soil water and fertilizer in local climate and soil properties. In this study, three ratios (soft rock: sand = 1: 1, 1: 2 and 1: 5) of soft rock and sand compound soil were conducted. The model was validated by field experiments. The results show that the model did good in simulating water and fertilizer dynamic. With decreasing soft rock content in compound soil, the evapotranspiration was no significant change, and water drainage was increased significantly. Water use efficiency, N use efficiency and fertilizer use efficiency could reach 4.38 kg m-3, 136.80 and 96.90 kg kg-1 N-1, respectively.