Utilization of Azolla in rice cultivation for environmental conservation and adaptation to climate change
利用满江红进行水稻种植以保护环境和适应气候变化
基本信息
- 批准号:21J14630
- 负责人:
- 金额:$ 1.25万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for JSPS Fellows
- 财政年份:2021
- 资助国家:日本
- 起止时间:2021-04-28 至 2023-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Azolla was either grown as a dual crop (Cover) or incorporated as green manure plus dual cropping (herein AGM + Cover) at the beginning of the experiment along with rice. Compared with the control (chemical fertilizer; NPK), NPK + Cover and AGM + Cover treatments did not influence cumulative CH4 emissions throughout the rice growth period. However, AGM + Cover treatment affected significant CH4 emissions at early, middle, and later rice growth stages by 141%, 25%, and 33%, respectively, compared with NPK + Cover treatment. These emissions were attributed to the readily available carbon substrate for methanogens following the incorporation of Azolla as green manure. Compared with NPK, NPK + Cover and AGM + Cover significantly increased N2O emissions by 646% and 816%, respectively, during the middle rice growth stage. No significant N2O emission differences were observed in the three treatments in the early or later rice growth stages. The higher N2O emissions from the middle rice growth stage were ascribed to high substrate availability from the dead Azolla by higher summer air temperature. AGM + Cover significantly decreased rice yield by 38% (NPK) and 35% (NPK + Cover), with no significant differences between NPK and NPK + Cover. This reduction was attributed to nitrogen immobilization from the incorporated Azolla during the early stage. Therefore, to ascertain the potential of Azolla in paddy fields to address environmental safety while sustaining yield, emphasis on the interaction of different application methods with various management practices is necessary.
Azolla在实验开始时与大米一起生长为双作物(盖)(盖)(覆盖物),或作为绿肥料加上双肥料(此处为AGM +盖)。与对照(化肥; NPK)相比,NPK +覆盖率和AGM +覆盖处理不会影响整个水稻生长期的累积CH4排放。然而,与NPK +覆盖疗法相比,AGM +覆盖治疗对早期,中期和后期水稻生长阶段的显着CH4排放量分别为141%,25%和33%。这些排放归因于掺入Azolla作为绿肥后,富含甲烷的碳底物。与NPK相比,在水稻中部生长阶段,NPK +覆盖率和AGM +覆盖率分别显着增加了N2O排放量646%和816%。在水稻生长阶段,在三种处理中未观察到N2O排放差异。较高的夏季空气温度归因于较高的水稻生长阶段的较高的N2O排放量归因于死亡Azolla的较高底物。 AGM +覆盖大米的产量显着降低了38%(NPK)和35%(NPK +覆盖率),NPK和NPK +覆盖率之间没有显着差异。这种降低归因于早期掺入的Azolla的氮固定化。因此,为了确定稻田中阿佐拉在维持环境安全方面的潜力,同时保持产量,重点是对不同的应用方法与各种管理实践的相互作用的相互作用。
项目成果
期刊论文数量(4)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Influence of Azolla incorporation and/or dual cropping on CH<sub>4</sub> and N<sub>2</sub>O emission from a paddy field
红萍掺入和/或双作对稻田CH<sub>4</sub>和N<sub>2</sub>O排放的影响
- DOI:10.1080/00380768.2022.2047580
- 发表时间:2022
- 期刊:
- 影响因子:2
- 作者:Kimani Samuel Munyaka;Bimantara Putu Oki;Kautsar Valensi;Torita Ren;Hattori Satoshi;Tawaraya Keitaro;Sudo Shigeto;Cheng Weiguo
- 通讯作者:Cheng Weiguo
Poultry litter biochar application in combination with chemical fertilizer and Azolla green manure improves rice grain yield and nitrogen use efficiency in paddy soil
- DOI:10.1007/s42773-021-00116-z
- 发表时间:2021-08-10
- 期刊:
- 影响因子:12.7
- 作者:Kimani, Samuel Munyaka;Bimantara, Putu Oki;Cheng, Weiguo
- 通讯作者:Cheng, Weiguo
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KIMANI Samuel Munyaka其他文献
KIMANI Samuel Munyaka的其他文献
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