Yield and Resource Utilization Efficiency Gap in Early Maturing Japonica Rice Cultivars under Different Management Strategies—A Different Location Investigation

Yandong Lv, Yue Hu, Fujing Sun, Wanyue Huo, Hongyu Li, Lihua Liu, Dawei Yin, Guiping Zheng and Xiaohong Guo
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Yandong Lv: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Yue Hu: Heilongjiang Agricultural Economy Vocational College, Mudanjiang 157041, China
Fujing Sun: Qingdao Pony Test Co., Ltd., Qingdao 266104, China
Wanyue Huo: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Hongyu Li: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Lihua Liu: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Dawei Yin: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Guiping Zheng: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China
Xiaohong Guo: College of Agriculture, Heilongjiang Bayi Agricultural University, Daqing 163319, China

Agriculture, 2022, vol. 12, issue 7, 1-15

Abstract: High input costs and poor management options have resulted in a large rice yield gap. Thus, there is a need to reduce production costs and improve resource-use efficiency by using new cultivation techniques at different locations. The objective of this study was to determine yield and utilization efficiency gaps in early maturing japonica rice under four treatments; no nitrogen application (N0), local farmer practice (FP), high-yield, high-efficiency practice (HYP), and super-high-yield practice (SHY). The average yields under N0, FP, HYP, and SHY were 5012, 7356, 8448, and 9629 kg ha − 1 , respectively. Differences among treatments were as: N0 to FP (gap 1); FP to HYP (gap 2); and HYP to SHY (gap 3). Yield gaps 1, 2, and 3 were 2337, 1092, and 1181 kg ha − 1 , respectively. Yield gap was positively associated with panicles per square meter. Yield under HYP and SHY was 14.8% and 30.9% higher than that under FP, respectively. This increase in yield was mainly associated with a higher number of panicles. For resources, gaps 1, 2, and 3 were as follows: water-use efficiency, 0.1706, 0.1513, and 0.1089 kg m − 3 ; radiation-use efficiency, 0.3285%, 0.1780%, and 0.0941%; and heat-use efficiency, 1.8685, 1.0339, and 0.8798 kg °C − 1 d − 1 ha − 1 , respectively. The yield was positively correlated with water, radiation, and heat-use efficiencies. The differences in yield and resource-use efficiency were significant between sites. A reduction in yield and efficiency gaps can ensure sufficient panicle per square meter, stabilize grain number per panicle, and increase harvest index and biomass. Overall, HYP is a promising option to increase the yield of early maturing japonica rice yield in cold regions.

Keywords: rice; yield gap; water-use efficiency; radiation-use efficiency; heat-use efficiency (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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