Co-Culture of Rice–Chinese Soft-Shell Turtle Increased the Food Yields and Economic Benefit with Less Greenhouse Gas Emissions

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides empirical data on GHG emissions and economic outcomes of rice-turtle co-culture, useful for agricultural climate research.

🏢実務担当者:Farmers and agricultural businesses can consider co-culture systems to enhance income and reduce emissions.

🏛政策担当者:Informs agricultural and climate policies that promote sustainable farming practices with economic and environmental co-benefits.

従来の稲作単作を魚との共作に転換することは、農家の収入を増やす一般的な戦略である。中国スッポンは水田共作に適した典型的な高価値種であるが、共作システム（RT）が温室効果ガス排出（GHG）に及ぼす影響は十分に理解されていない。本研究は、RTが経済的利益と温室効果ガス排出に及ぼす影響を評価した。我々の結果は、RT共作がイネ収量を有意に増加させないものの、スッポンの販売による追加収入を提供し、純利益を増加させることを示した。GHG排出のRTへの応答は、2つの農場間で異なった。農場1では、RTはイネ栽培面積からのCH4排出を増加させたが、スッポン養殖面積からのそれを減少させ、総CH4排出には正味の影響を与えなかった。スッポン養殖面積におけるCH4排出の減少は、より低いDOC含有量とメタン生成遺伝子mcrAの存在量の減少と関連していた。農場2では、RTは両方の面積からのCH4排出を減少させ、総CH4排出を36.5%低下させたが、これはより少ない湛水とより高いメタン酸化遺伝子（pmoA）の存在量に関連していた。総N2O排出は、どちらの農場でもRTによって有意な影響を受けなかった。RTは間接的なGHG排出を増加させたが、これらは総排出のわずか7.2–16.9%を占めた。全体として、RTは農場2で総GHG排出を27.7%減少させ、農場1では有意な変化はなかった。これらの知見は、RTが総GHG排出を軽減しながら経済的利益を高めることができることを示唆している。

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Converting conventional rice monoculture to co-culture with fish is a common strategy to increase farmers’ incomes. The Chinese soft-shell turtle is a typical high-value species for paddy co-culture, but the effects of the co-culture system (RT) on greenhouse gas emissions (GHG) are poorly understood. This study evaluated the impacts of RT on economic benefits and greenhouse gas emissions. Our results showed that RT co-culture did not significantly increase rice yield, but it provided additional income from turtle sales, increasing net profits. GHG emission responses to RT differed between the two farms. In farm 1, RT increased CH4 emissions from the rice-cultivated area but decreased them from the turtle culture area, resulting in no net effect on total CH4 emissions. The reduction of CH4 emissions in the turtle culture area was associated with lower DOC content and reduced methanogenic gene mcrA abundance. In farm 2, RT reduced CH4 emissions from both areas, lowering total CH4 emissions by 36.5%, which was linked to less water flooding and higher methanotrophic gene (pmoA) abundance. Total N2O emissions were not significantly affected by RT at either farm. RT increased indirect GHG emissions, but these accounted for only 7.2–16.9% of total emissions. Overall, RT reduced total GHG emissions by 27.7% at farm 2, with no significant change at farm 1. These findings suggest that RT can enhance economic benefit while lessening total GHG emissions.

• crossref https://doi.org/10.3390/agronomy16151451first seen 2026-08-01 07:30:53 · last seen 2026-08-11 05:33:10