Effect of Reducing Nitrogen and Applying Organic Fertilizer on Nitrogen Use Efficiency and Rice Yield in Red Soil Regions of the Southern China
Journal of Energy, Environmental & Chemical Engineering
Volume 6, Issue 1, March 2021, Pages: 10-15
Received: Nov. 26, 2020;
Accepted: Dec. 22, 2020;
Published: Jan. 12, 2021
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Qihong Tu, Key Laboratory of Digital Land and Resources, East China University of Technology, Nanchang, China
Zhenjiang Zhang, Key Laboratory of Digital Land and Resources, East China University of Technology, Nanchang, China
Min Liu, Agricultural Technology Extension Station of Fengcheng City, Yichun, China
To explore the amount of reducing N fertilizer, a 2-year field experiment was conducted to investigate the effects of reducing N fertilizer and applying organic fertilizer on nitrogen use efficiency (NUE) and rice yield in red soil regions of the Southern China. On the basis of applying 4500 kg/ha organic fertilizer and local custom fertilization with 204 kg/ha urea application, five treatments including no nitrogen fertilization (CK), local customary nitrogen application (N100), and nitrogen reduction of 10% (N90), 20% (N80), and 30% (N70) were conducted. The results showed that nitrogen agronomic efficiency (NAE), nitrogen recovery efficiency (NRE), nitrogen physiological efficiency (NPE) and nitrogen partial factor productivity (NPFP) of N90 treatment were significantly higher than those of other treatments, and the yield was as high as 9.33 t/ha, which showed a significant differences compared with CK and N100. The output value, benefit, and benefit-cost ratio of N90 were significantly higher than those of N100, which increased by 6.38%, 6.42%, 8.35%, and 8.20%, respectively. In addition, while applying the same amount of organic fertilizer, the rate of nitrogen reduction has little effect on the soil organic matter content, meaning that N90 can achieve high NUE and high yield in rice. It is good to provide the theory basis for fertilizer decision-making in practice.
Effect of Reducing Nitrogen and Applying Organic Fertilizer on Nitrogen Use Efficiency and Rice Yield in Red Soil Regions of the Southern China, Journal of Energy, Environmental & Chemical Engineering.
Vol. 6, No. 1,
2021, pp. 10-15.
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