Influence of Azolla incorporation and/or dual cropping on CH<sub>4</sub> and N<sub>2</sub>O emission from a paddy field
Influence of Azolla incorporation and/or dual cropping on CH<sub>4</sub> and N<sub>2</sub>O emission from a paddy field
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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
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发表时间：
2022
影响因子：
2
通讯作者：
Cheng Weiguo
中科院分区：
文献类型：
--
作者：
Kimani Samuel Munyaka;Bimantara Putu Oki;Kautsar Valensi;Torita Ren;Hattori Satoshi;Tawaraya Keitaro;Sudo Shigeto;Cheng Weiguo
我们以前的盆栽试验表明，使用红萍作为双和绿色肥料与水稻增加其产量或显着减少甲烷（CH 4）和一氧化二氮（N2 O）的排放量。为了在实际田地中证实这些发现，满江红在实验开始时与水稻一起作为双季作物（在本文中为Cover）种植或作为绿色加双季作物（在本文中为AGM + Cover）掺入。与对照（化肥;此处为NPK）相比，NPK +覆盖和AGM +覆盖处理不影响整个水稻生育期的CH 4累积排放量。但AGM +覆盖处理对水稻生育前期、中期和后期CH 4排放的影响显著，分别为NPK +覆盖处理的140.6%、24.6%和33.1%。这些排放归因于红萍作为绿色肥料掺入后，产甲烷菌容易获得的碳底物。与NPK相比，NPK +覆盖和AGM +覆盖使中稻生育期N2 O排放量分别增加645.9%和816.2%。在水稻生长前期和后期，三种处理的N2 O排放量差异均不显著。中稻生长期的N2 O排放量较高，归因于2019年夏季气温较高，死亡满江红的基质可用性较高。AGM +覆盖显著降低水稻产量，NPK和NPK +覆盖分别减产37.5%和35.3%，NPK和NPK +覆盖差异不显著。这种减少是由于氮固定从合并满江红在早期阶段。因此，为了确定红萍在稻田中的潜力，以解决环境安全，同时保持产量，强调不同的应用方法与各种管理措施的相互作用是必要的。
Our previous pot experiments showed that using Azolla either or both as dual and green manure with rice increases its yield or significantly reduces either or both methane (CH4) and nitrous oxide (N2O) emissions. To confirm these findings in an actual field, Azolla was either grown as a dual crop (herein 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; herein NPK), NPK + Cover and AGM + Cover treatments did not influence cumulative CH4emissions throughout the rice growth period. However, AGM + Cover treatment affected significant CH4emissions at early, middle, and later rice growth stages by 140.6%, 24.6%, and 33.1%, 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 645.9% and 816.2%, 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 in the 2019 season. AGM + Cover significantly decreased rice yield by 37.5% (NPK) and 35.3% (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.
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影响因子：
6.5
作者：
I. Watanabe;W. Ventura;G. Mascarina;D. Eskew
通讯作者：
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影响因子：
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DOI：
10.16943/ptinsa/2014/v80i2/55108
发表时间：
2014
期刊：
--
影响因子：
--
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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