产量、甲烷（CH4）和氧化亚氮（N2O）排放量对轮作水稻种植和不同管理方法的影响

IF 5.6 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2024-10-23 DOI:10.1016/j.fcr.2024.109622

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引用次数: 0

摘要

背景或问题从单季稻（SR）或双季稻（DR）到轮作水稻（RR）的转换在中国越来越受欢迎。然而，有关其对温室气体（GHG，包括甲烷（CH4）和氧化亚氮（N2O））排放和粮食产量的影响的定量综述尚未开展。目的或研究问题目的是评估从 SR 或 DR 转为 RR 对 CH4 和 N2O 排放、谷物产量、全球升温潜能值 (GWP) 和温室气体强度 (GHGI) 的影响，并调查 RR 田 (oRR) 中不同操作方法 [干湿交替灌溉、氮素管理、水稻品种选择及其多重处理（多重措施）] 的潜在响应。结果我们的研究结果表明，从SR到RR的转换显著增加了CH4排放量、谷物产量和全球升温潜能值，分别增加了35.4%、30.6%和43.3%。相比之下，从 DR 到 RR 的转换则使 CH4 排放量、谷物产量和全球升温潜能值分别减少了 23.2%、7.4% 和 30.0%。有趣的是，从 SR 或 DR 到 RR 的转换并不影响水稻田的 N2O 排放，但减少了 GHGI，这表明 RR 提供了一种经济上和生态上可持续的水稻种植模式。此外，平均而言，oRR 进一步减少了 RR 稻田的 CH4 和 N2O 排放以及 GHGI，但不影响谷物产量。在现有的管理措施中，多重措施的总体效果优于干湿交替灌溉、氮素管理和水稻品种选择。总之，轮作水稻既减少了甲烷排放，又保持了水稻产量，但今后还需要进一步实施综合栽培策略，以最大限度地提高粮食产量和减少温室气体排放。

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Responses of yield, CH4 and N2O emissions to ratoon rice cropping and different management practices

Context or problem

Conversion from single rice (SR) or double rice (DR) to ratoon rice (RR) is gaining growing popularity in China. Yet, a quantitative synthesis of their impact on greenhouse gas (GHG, including methane (CH₄) and nitrous oxide (N₂O)) emissions and grain yield has not been conducted.

Objective or research question

The objective was to evaluate the effects of conversion from SR or DR to RR on CH₄ and N₂O emissions, grain yield, global warming potential (GWP), and greenhouse gas intensity (GHGI) and to investigate the potential responses to different operating practices [alternate wetting-drying irrigation, nitrogen management, rice variety selection, and their multiple treatments (multiple measures)] in RR fields (oRR).

Methods

In this study, a comprehensive meta-analysis of 571-paired measurements from ratoon rice fields was conducted.

Results

Our results showed that the conversion from SR to RR significantly increased CH₄ emissions, grain yield, and GWP by 35.4 %, 30.6 %, and 43.3 %, respectively. In contrast, the conversion from DR to RR decreased CH₄ emissions, grain yield, and GWP by 23.2 %, 7.4 %, and 30.0 %, respectively. Interestingly, both conversions from SR or DR to RR did not affect N₂O emissions but reduced GHGI in paddy fields, suggesting that RR provided an economically and ecologically sustainable rice planting model. Furthermore, on average, oRR further decreased CH₄ and N₂O emissions and GHGI from RR fields but did not affect grain yield. Among the existing management practices, the overall effect of multiple measures was better than that of alternate wetting-drying irrigation, nitrogen management, and rice variety selection.

Conclusions

Overall, ratoon rice cropping decreased CH₄ emissions and maintained rice grain yield. However, it is also necessary to further implement comprehensive cultivation strategies in the future to maximize the benefits of grain yield and GHG emissions reduction.

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来源期刊

Field Crops Research 农林科学-农艺学

CiteScore

9.60

自引率

12.10%

发文量

307

审稿时长

46 days

期刊介绍： Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.