Soil Organic Nitrogen and Its Contribution to Crop Production  

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

机构地区：[1]College of Natural Resources and Environment,Northwest A&F University [2]School of Agriculture,Henan University of Science and Technology [3]State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Northwest A&F University

出　　处：《Journal of Integrative Agriculture》2014年第10期2061-2080,共20页农业科学学报（英文版）

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

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.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.

关 键 词：organic nitrogen in soil chemical components soil N supplying capacity MINERALIZATION CONTRIBUTION 

分 类 号：S158.3[农业科学—土壤学]