Soil Organic Nitrogen and Its Contribution to Crop Production

作     者：LI Sheng-xiu WANG Zhao-hui MIAO Yan-fang LI Shi-qing 

作者机构：College of Natural Resources and EnvironmentNorthwest A&F University School of AgricultureHenan University of Science and Technology State Key Laboratory of Soil Erosion and Dryland Farming on the Loess PlateauNorthwest A&F University 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2014年第13卷第10期

页      面：2061-2080页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：supported by the National Natural Science Foundation of China(30971866 and 30230230) 

主　　题：organic nitrogen in soil chemical components soil N supplying capacity mineralization contribution 

摘      要：Plant growth and crop production depend to a large extent on soil N supplying capacity （SNSC）： The higher the SNSC, the higher the dependence of crops on soil and the lower the N fertilizer recovery. Of the SNSC, soil organic N （ON） played a key role in supplying N nutrient to crop production and still does in many subsistence and low-input farming systems. In this paper, soil ON contents, types, chemical components and its contribution to plant production are reviewed up to date in details, the characteristics of ON in dryland soils discussed together with its chemical components, and the mineralization and availability to plants of some important chemical components are emphasized at the last part for practical considerations.