Journal of Ecology and Rural Environment ›› 2018, Vol. 34 ›› Issue (9): 769-775.doi: 10.11934/j.issn.1673-4831.2018.09.001

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The Assessment Method of Nitrate Nitrogen Leaching and Ammonia Volatilization of Winter Wheat-Summer Maize Rotation in North China Plain Based on RZWQM Model

SHEN Shi-zhou1,2, ZHANG Ke-qiang1,2, WANG Feng1,2, LAI Rui-te1, YAN Qing1, YANG Han-bo1   

  1. 1. Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China;
    2. Scientific Observing and Experimental Station of Dali, Ministry of Agriculture, Dali 671000, China
  • Received:2017-09-25 Online:2018-09-25 Published:2018-10-25


Nitrogen loss through NO3--N leaching and NH3 volatilization are the two major ways in North China Plain. Direct monitoring of the mentioned nitrogen loss in farmland conditions is complicated due to laborious and expensive research work. To overcome these difficulties, it is imperative to develop a practical model for the appropriate estimation of nitrogen loss through leaching and volatilization. The model should estimate the nitrogen losses through each channel rapidly and be convenient for the management department. The model's basic mechanism should ascertain scientific and accurate relationship between quantity of actual nitrogen losses and soil properties. For these purposes, the model RZWQM was investigated. The mentioned model was found to be validated for wheat-corn crop rotation long-term field experiment in North China Plain. Through regression analysis, the model established a function between quantity of nitrogen loss and the amount of residual NO3--N in 0-1 m soil profile layer. Research literature data regarding North China Plain validated the function relation accuracy of the model under investigated, which was observed 70.9% and 71.2%. So, it is suggested that the RZWQM model can be used practically by management department to estimate and control non-point source pollution in North China Plain.

Key words: North China Plain, RZWQM model, leaching, ammonia volatilization, nitrate nitrogen residue

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