Reasonable Nitrogen Fertilizer Management Improves Rice Yield and Quality under a Rapeseed/Wheat–Rice Rotation System

Peng Ma, Yan Lan, Xu Lv, Ping Fan, Zhiyuan Yang, Yongjian Sun, Rongping Zhang and Jun Ma
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Peng Ma: School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 610000, China
Yan Lan: College of Agronomy, Sichuan Agricultural University, Wenjiang, Chengdu 611130, China
Xu Lv: Rice Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, China
Ping Fan: Rice Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, China
Zhiyuan Yang: Rice Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, China
Yongjian Sun: Rice Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, China
Rongping Zhang: School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 610000, China
Jun Ma: Rice Research Institute, Sichuan Agricultural University, Wenjiang, Chengdu 611130, China

Agriculture, 2021, vol. 11, issue 6, 1-14

Abstract: To determine the influence of N fertilizer management on rice yield and rice quality under diversified rotations and establish a high-yield, high-quality, and environmentally friendly diversified planting technology, a rapeseed/wheat–rice rotation system for 2 successive years was implemented. In those rotation systems, a conventional N rate (Nc; 180 kg/hm 2 N in rape season, 150 kg/hm 2 N in wheat season) and a reduced N rate (Nr; 150 kg/hm 2 N in rape season, 120 kg/hm 2 N in wheat season) were applied. Based on an application rate of 150 kg/hm 2 N in the rice season, three N management models were applied, in which the application ratio of base:tiller:panicle fertilizer was 20%:20%:60% in treatment M1, 30%:30%:40% in treatment M2, and 40%:40%:20% in treatment M3. Zero N was used as the control (M0). The results showed that, under Nc and Nr in the rape season, M3 management produced an increase in rice yield. The average rice yields in 2018 and 2019 were 9.41 t/hm 2 and 9.54 t/hm 2 , respectively. An increase in rice peak viscosity, hot viscosity, break disintegration, and chalkiness was achieved. Under Nc and Nr in the wheat season, the panicle fertilizer of 40%:40%:20% in rice season produced a higher rice yield. The average yield was 9.45 t/hm 2 and 9.19 t/hm 2 , respectively, and an increase in rice peak viscosity, hot viscosity, and break disintegration was produced. Reduced N for rapeseed and the panicle fertilizer of 40%:40%:20% in rice season under a rapeseed–rice rotation system can be recommended to stabilize yield and ensure high-quality rice production and environmentally friendly rapeseed–rice rotation systems in southern China.

Keywords: rapeseed/wheat–rice rotation system; nitrogen management; rice yield; rice quality (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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