Substitution of fiber hemp for corn did not affect soil greenhouse gas emissions from a Kentucky cropping system
ケンタッキー州の作付体系において、ファイバーヘンプのトウモロコシへの代替は土壌温室効果ガス排出に影響しなかった (AI 翻訳)
Kent Pham, Rebecca K. McGrail, Luke A. Moe, Robert Pearce, Rebecca L. McCulley
🤖 gxceed AI 要約
日本語
ケンタッキー州で2022年と2023年に実施した圃場試験により、繊維用麻とトウモロコシの温室効果ガス（GHG）排出量を比較。両作物の二酸化炭素換算での累積排出量は同等だったが、トウモロコシは麻より最大3.5倍多い根バイオマスを蓄積した。麻栽培の短期的な環境持続可能性への貢献に疑問を投げかける。
English
Field experiments in Kentucky over 2022-2023 compared greenhouse gas emissions from fiber hemp and corn. Cumulative CO2-equivalent emissions were similar for both crops, but corn stored up to 3.5 times more root biomass. This challenges the claim that hemp cultivation improves short-term environmental sustainability.
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
日本の農業分野でも、バイオマス作物の炭素収支評価が重要になっている。本論文は、代替作物のGHG排出比較に関する実証データを提供し、日本での類似研究やLCAの参考となる。
In the global GX context
This paper provides empirical GHG flux data for two major crops, relevant to agricultural carbon accounting and lifecycle assessments globally. It challenges carbon neutrality claims for hemp, which is important for policymakers and carbon markets.
👥 読者別の含意
🔬研究者:Provides field-level GHG and root biomass data for hemp vs corn, useful for agricultural carbon cycle modeling.
🏢実務担当者:Farmers and agribusinesses can use these results to evaluate the carbon footprint of hemp cultivation compared to corn.
🏛政策担当者:Informs agricultural climate policy by questioning hemp's short-term carbon benefits in temperate cropping systems.
📄 Abstract（原文）
Abstract Industrial hemp's return to American agriculture has been accompanied by claims of the crop's carbon neutrality, primarily due to its commercial applications. While carbon can be sequestered within products made with hemp fiber, there is little empirical evidence quantifying greenhouse gas contributions from the crop's production. Here we quantified fiber hemp's soil‐to‐atmosphere greenhouse gas fluxes and root production throughout the 2022 and 2023 growing seasons in central Kentucky and compared them to those of corn cultivated under similar conditions. Daily gas fluxes were measured from the plots throughout the growing season, accompanied by monthly soil sampling (0–10 cm) and root sampling (0–30 cm) at crop harvest. For both years, hemp and corn plots emitted similar cumulative amounts of carbon dioxide warming equivalents (2.1 ± 0.2 Mg ha −1 ). Nitrous oxide emissions and methane uptake were significantly greater in corn in 2022 but were similar in 2023. Soil permanganate oxidizable carbon for each crop was similar at all time points measured, though there was a seasonal trend, suggesting comparable labile soil organic matter contributions to gas emissions. End of season in‐row root measurements in 2022 and 2023 revealed that corn plots contained up to 3.5 times more root biomass than hemp at both the 0‐ to 10‐ and 10‐ to 30‐cm depth profiles. Under these cultivation conditions, fiber hemp released similar amounts of greenhouse gas equivalents while storing significantly less carbon belowground in roots than corn, calling into question the idea that hemp cultivation is likely to improve the short‐term environmental sustainability of the cropping system.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1002/agg2.70407first seen 2026-07-27 06:10:07
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