Tillage does not impact soil greenhouse gas emissions in a Central Texas rainfed maize–cotton system
耕起はテキサス中部の天水トウモロコシ–綿花体系における土壌温室効果ガス排出に影響しない (AI 翻訳)
Dorothy Menefee, Hal Collins, Doug Smith
🤖 gxceed AI 要約
日本語
テキサス中部の天水トウモロコシ–綿花輪作で、慣行耕起、ストリップ耕起、不耕起の3処理を比較し、土壌GHGフラックス（CO2、CH4、N2O）を3シーズン測定。耕起方法はGHG排出に有意な影響を与えず、N2Oは土壌水分・温度・硝酸態窒素に主に影響された。保全農法の環境影響評価に示唆を与える。
English
In a rainfed maize–cotton rotation in Central Texas, static chamber measurements over three growing seasons showed that tillage practices (conventional, strip, no-till) had no significant effect on soil GHG fluxes (CO2, CH4, N2O). N2O emissions were primarily driven by soil moisture, temperature, and nitrate availability. Findings support the sustainability of no-till without increasing GHG emissions.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本の農業分野では、耕起低減や不耕起導入がGHG排出削減策として注目されるが、本結果は土壌条件や気候により効果が異なることを示す。日本の水田や畑作への適用には現地検証が必要で、国内の農業由来N2O排出インベントリや緩和策の検討に参考となる。
In the global GX context
This study contributes to global agricultural GHG literature by showing that tillage may not be a key driver of soil GHG emissions in semi-arid rainfed systems. It supports the climate neutrality of conservation tillage, relevant for climate-smart agriculture and carbon farming initiatives under voluntary carbon markets and national GHG inventories.
👥 読者別の含意
🔬研究者:Provides empirical evidence on tillage effects on GHG fluxes, useful for refining agricultural emission factors and modeling.
🏢実務担当者:Informs farmers and agronomists that no-till can be adopted without increasing soil GHG emissions in similar rainfed systems.
🏛政策担当者:Suggests that tillage-based mitigation policies may need to consider local soil and climate conditions; not a one-size-fits-all solution.
📄 Abstract（原文）
Abstract Agricultural soils are a significant source of greenhouse gas (GHG) emissions, primarily as N 2 O. Monitoring how management practices impact soil gas fluxes (CO 2 , CH 4 , and N 2 O) is useful for making sure conservation practices (e.g., no‐till) are sustainable with regards to all potential environmental impacts. Static chambers were used to collect soil gases from a rainfed maize–maize–cotton rotation ( Zea mays and Gossypium hirsutum ) with three tillage treatments (conventional till, strip‐till, and no‐till) in Temple, TX, at a USDA Long‐Term Agroecosystem Research network site. Soil available nitrogen (ammonia and nitrate), soil moisture, and soil temperature were also collected alongside gas measurements. Measurements were conducted over three growing seasons to capture the full rotation cycle in each plot. CH 4 fluxes were small and largely net uptake with some influence of soil temperature and crop selection. Soil CO 2 fluxes were primarily influenced by soil moisture ( p < 0.0001) and temperature ( p < 0.0001). Soil N 2 O emissions were primarily correlated with soil moisture ( p < 0.0001), temperature ( p < 0.0001), and nitrate availability ( p < 0.001). Tillage practices had no significant effect on soil GHG fluxes, including N 2 O, in this agricultural system.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1002/agg2.70386first seen 2026-07-02 07:49:33 · last seen 2026-07-15 06:05:42
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