应用HYDRUS-1D模型模拟农田土壤水渗漏及硝态氮淋失特征

Abstract

Abstract: Based on a stationary experiment,soil water leaching deep drainage and nitrate-N loss with leachate in a soil（yellow fluvo-aquic soil）representative of the Huang-Huai-Hai Plain were simulated with the HYDRUS-1D model.The results showed that under conventional water and nitrogen management,percolation of soil water and nitrate leaching were very serious in the soil,causing a loss of about 23.7% of the total amount of irrigation and precipitation,and about 15.9% of the total N applied during two successive rotations;the amount of nitrate leaching in the season of winter wheat was higher than in the season of summer maize;and the modified irrigation and fertilization management pattern reduces the nitrate-N loss by 74.7% as was compared with the conventional one,thus saving 211.5 mm of irrigation water and N 423.5 kg·hm^-2.

Key words: HYDRUS-1D model, soil water, percolation, nitrate-N, leaching

CLC Number:

S152.7

BI Jing-Wei, ZHANG Jia-Bao, CHEN Xiao-Min, ZHU An-Ning, FENG Jie. Simulation of soil water leaching and nitrate-N loss with leachate in the field using HYDRUS-1D model[J]. Journal of Ecology and Rural Environment, 2004, 20(2): 28-32.

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Simulation of soil water leaching and nitrate-N loss with leachate in the field using HYDRUS-1D model

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