Soil Organic Nitrogen and Its Contribution to Crop Production
LI Sheng-xiu, WANG Zhao-hui, MIAO Yan-fang , LI Shi-qing
1、College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, P.R.China
2、School of Agriculture, Henan University of Science and Technology, Luoyang 471003, P.R.China
3、State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, P.R.China
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.
Abstract 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.
LI Sheng-xiu, WANG Zhao-hui, MIAO Yan-fang , LI Shi-qing.
2014.
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CAO Su-mei, LI Ting-ting, SHAO Yu-xin, ZHAO Yu-zhen, ZHANG Li-yang, LU Lin, ZHANG Ri-jun, HOU Shui-sheng, LIAO Xiu-dong, LUO Xu-gang, WANG Run-lian.
