Journal of Guangxi Normal University(Natural Science Edition) ›› 2026, Vol. 44 ›› Issue (5): 194-204.doi: 10.16088/j.issn.1001-6600.2025122303

• Agricultural Science • Previous Articles     Next Articles

Regulatory effect of water and fertilizer management on greenhouse gas emissions from rice paddy fields

Ge Yujiao1, Liang Jingxiao1, Liang Meiying2, Su Shihua2, Zhao Haixiong2, Hu Lening1*   

  1. 1. Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions/University Engineering Research Center of Green Remediation and Low Carbon Development for Lijiang River Basin (Guangxi Normal University), Guilin Guangxi 541006, China;
    2. Guilin Farmland Irrigation Experiment Station, Guilin Guangxi 541105, China
  • Received:2025-12-23 Revised:2026-03-04 Online:2026-09-05 Published:2026-07-24

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Abstract: The present study was conducted to investigate the effects of different water and fertiliser regimes on greenhouse gas emissions (CH4, N2O, CO2) from paddy fields. To this end, traditional water and fertiliser management was employed as the control. The experiment involved the cross-pollination of three irrigation patterns (rainfed, shallow, intermittent) with three fertilizer application rates (low, moderate, high) to create an array of interactive treatment combinations. An experiment was conducted over the course of the entire growth period of double-cropped rice as a full-season field experiment. The monitoring of greenhouse gas emission fluxes throughout the rice growth cycle is to be conducted using static chamber-gas chromatography, with the subsequent calculation and determination of their global warming potential and greenhouse gas emission intensity. The findings suggested that the cumulative N2O emissions under all treatments in this study were lower than those under conventional water and fertiliser management. The most effective strategy for minimising CO2 emissions through water and fertiliser management involves the implementation of shallow irrigation techniques and the moderation of fertilisation rates. The implementation of intermittent irrigation in conjunction with moderate fertilization resulted in a rice yield of 15.58 t·hm-2. This approach led to a substantial reduction in CH4 emissions, achieving the highest emission reduction rate among all treatments at 80.49%. The findings of this study demonstrate that a combination of intermittent irrigation and moderate fertilization has the potential to significantly reduce the global aggregate warming potential and greenhouse gas emission intensity. This approach is identified as the optimal treatment in this study for balancing rice yield with ecological emission reductions.

Key words: paddy rice, water and fertilizer management, greenhouse gas, methane, nitrous oxide, carbon dioxide

CLC Number:  S511
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