Discrimination of soil productivity and fertilizer-nitrogen use efficiency in the paddy field of subtropical China after 27 years different fertilizations
文献类型： 外文期刊
作者： Wu, Meng 1 ; Li, Guilong 1 ; Wei, Shiping 1 ; Li, Pengfa 1 ; Liu, Ming 1 ; Liu, Jia 1 ; Li, Zhongpei 1 ;
作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Jiangsu, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
3.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Nanchang, Jiangxi, Peoples R China
关键词： Soil productivity; nitrogen use efficiency; soil organic carbon; 3-dimensional fluorescence
期刊名称：ARCHIVES OF AGRONOMY AND SOIL SCIENCE （ 影响因子：3.092； 五年影响因子：2.745 ）
ISSN： 0365-0340
年卷期：
页码：
收录情况： SCI
摘要： To select optimal fertilization management for soil productivity and fertilizer-nitrogen use efficiency (NUE) improvement in rice fields, we conducted a microplot experiment by growing rice in soils from different long-term fertilizations with the same inorganic fertilizers. The NUE was accurately evaluated using N-15 labeled urea. The variations of the chemical compositions of soil organic carbon (SOC) under different long-term fertilizations were investigated by three-dimensional fluorescence measurement. The results indicated that the treatments containing organic materials could maintain high soil productivities and displayed higher NUE than inorganic treatments. Total phosphorus (TP) was the most important soil factor for soil productivity and the SOC content ranked second, whereas SOC content was the primary soil factor affecting NUE and TP ranked second. Applying organic materials also significantly changed the chemical compositions of SOC as compared with inorganic treatments. Besides the SOC content, the chemical compositions of SOC also affect the soil productivity and NUE. In summary, long-term balanced application of inorganic fertilizers and organic materials increased the quantity and changed the chemical composition of SOC, and thus maintained high soil productivity and NUE.
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