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Yield Gap Analysis of Super High-Yielding Rice (>15 t ha −1 ) in Two Ecological Regions

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  • Zhongwei Wei

    (College of Agronomy, Hunan Agricultural University, Changsha 410128, China
    State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China)

  • Yuzhu Zhang

    (College of Agronomy, Hunan Agricultural University, Changsha 410128, China
    State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China)

  • Wenyu Jin

    (College of Agronomy, Hunan Agricultural University, Changsha 410128, China
    State Key Laboratory of Hybrid Rice, Hunan Hybrid Rice Research Center, Changsha 410125, China)

Abstract

Super high-yielding rice (SHYR) (>15 t ha −1 ) plays a crucial role in global food production and security. We hypothesized that the external environment of different ecological regions could improve biomass accumulation in different periods and thus increase the rice yield. Two SHYR varieties, i.e., Xiangliangyou900 (XLY900) and Yliangyou900 (YLY900), were cultivated in the YONGSHENG and LONGHUI ecoregions, China. The results indicated that the average yield of the two SHYRs in the LONGHUI ecological region was 15.27–15.45 t ha −1 and 18.81–20.10 t ha −1 in YONGSHENG. The high grain yield in the YONGSHENG ecoregion was mainly due to the increased number of spikelets per panicle, crop growth rate, and total biomass during the transplanting–heading stage (TP-HS) and heading–maturity stage (HS-MS), and harvest index. The yield of SHYR was significantly correlated with external environment conditions, i.e., average minimum temperature, average daytime, and night-time temperature, and average daily temperature at the TP-HS, HS-MS, and transplanting–maturity (TP-MS) stages. The rice yield was significantly and positively correlated with the cumulative daily radiation. Therefore, it can be concluded that the final yield of super high-yield rice is closely related to the utilization of temperature and radiation resources during the growth process in the ecological environment.

Suggested Citation

  • Zhongwei Wei & Yuzhu Zhang & Wenyu Jin, 2024. "Yield Gap Analysis of Super High-Yielding Rice (>15 t ha −1 ) in Two Ecological Regions," Agriculture, MDPI, vol. 14(3), pages 1-12, March.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:3:p:491-:d:1358901
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    References listed on IDEAS

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    1. Min Huang, 2022. "The decreasing area of hybrid rice production in China: causes and potential effects on Chinese rice self-sufficiency," Food Security: The Science, Sociology and Economics of Food Production and Access to Food, Springer;The International Society for Plant Pathology, vol. 14(1), pages 267-272, February.
    2. Weifeng Zhang & Guoxin Cao & Xiaolin Li & Hongyan Zhang & Chong Wang & Quanqing Liu & Xinping Chen & Zhenling Cui & Jianbo Shen & Rongfeng Jiang & Guohua Mi & Yuxin Miao & Fusuo Zhang & Zhengxia Dou, 2016. "Closing yield gaps in China by empowering smallholder farmers," Nature, Nature, vol. 537(7622), pages 671-674, September.
    3. Nanyan Deng & Patricio Grassini & Haishun Yang & Jianliang Huang & Kenneth G. Cassman & Shaobing Peng, 2019. "Closing yield gaps for rice self-sufficiency in China," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
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