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首页> 外文期刊>Agriculture, Ecosystems & Environment: An International Journal for Scientific Research on the Relationship of Agriculture and Food Production to the Biosphere >Effect of fish species on methane and nitrous oxide emission in relation to soil C, N pools and enzymatic activities in rainfed shallow lowland rice-fish farming system.
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Effect of fish species on methane and nitrous oxide emission in relation to soil C, N pools and enzymatic activities in rainfed shallow lowland rice-fish farming system.

机译：雨养浅水稻田养鱼系统中鱼类物种对甲烷和一氧化二氮排放的影响与土壤碳，氮库和酶活性的关系。

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摘要

Four fish species namely, Cirrhinus mrigala H. (mrigal), Labeo rohita H. (rohu), Cyprinus carpio L. (common carp) and Catla catla H. (catla) were introduced along with rice (Oryza sativa L.) cv. Varshadhan, in a rainfed shallow (0-25 cm water depth) Inceptisol to evaluate the effect of fish species on methane (CH4) and nitrous oxide (N2O) emission in a rice-fish farming system. On seasonal basis, the emission of CH4 was significantly higher by 26% under rice-fish co-culture compared to rice alone. The maximum emission of CH4 (36% higher) was found under rice+common carp farming. On contrary, the emission of N2O was significantly lower by 9% under rice-fish compared to rice alone. Although the global warming potential (GWP) was highest (29.5% more) in rice+common carp, the CH4 and N2O emission from this treatment per unit of total yield (rice+fish) were at par and significantly lower, respectively, compared to rice alone. Further, it provided significantly higher yield (rice+fish) and economic benefit over rice and other rice+fish species combinations. The integration of common carp with rice in rainfed shallow lowland ecology is thus, one of the viable options for livelihood of the small and marginal farmers besides, higher carbon (C) credit compliance. However, Indian major carps, mrigal rohu and catla in order, are potentially less harmful in terms of GHGs emission in shallow rice fields besides, higher profitability and carbon credit compliance compared to rice farming alone.
机译：与水稻（Oryza sativa L.）cv一起引入了四种鱼类，分别为：Cirrhinus mrigala H.（mrigal），Labeo rohita H.（rohu），Cyprinus carpio L.（普通鲤鱼）和Catla catla H.（catla）。 Varshadhan，在雨育浅水区（0-25厘米水深）的Inceptisol中，评估鱼类对甲烷（CH 4 ）和一氧化二氮（N 2 O）的影响稻鱼养殖系统中的排放。按季节计算，与单独的水稻相比，稻-鱼共培养下CH 4 的排放量明显增加了26％。在稻田+鲤鱼养殖中，CH 4 的最大排放量增加了36％。相反，与单独的稻米相比，稻鱼下的N 2 O排放量显着降低了9％。尽管稻米+鲤鱼的全球变暖潜能值最高（增加29.5％），但这种处理方法每单位总排放量排放的CH 4 和N 2 O与单独的稻米相比，稻米的产量（稻米+鱼）分别处于同等水平和明显更低。此外，与水稻和其他水稻+鱼类物种组合相比，它提供了更高的产量（大米+鱼类）和经济利益。因此，在雨育的浅地低地生态系统中，鲤鱼和水稻的融合是除中碳和碳信用额较高的条件之外，也是中小农民和边远农民谋生的可行选择之一。但是，就印度而言，主要的鲤鱼，桑rig（Mrigal rohu）和卡特拉（catla）在浅稻田中的温室气体排放方面危害可能较小，此外，与单独种植稻米相比，其较高的盈利能力和碳信用合规性。

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