Carbon mass balance in growing-finishing pigs
成長期・肥育期の豚における炭素収支 (AI 翻訳)
Brian J. Kerr, Steven Trabue, Dalton C. Humphrey, Gerald C. Shurson
🤖 gxceed AI 要約
日本語
豚の飼料中炭素の収支を分析し、糞・尿・体蓄積・呼気への分配を定量化。炭素利用効率は約25%と低く、飼料戦略改善の必要性を示す。炭素排出削減と養豚の持続可能性向上に寄与する。
English
This study quantifies carbon mass balance in growing-finishing pigs, showing that only about 25% of dietary carbon is retained in the body, while 50-55% is exhaled as CO2 and CH4. It highlights the potential to improve carbon use efficiency through feeding strategies, contributing to reduced carbon footprint of pork supply chains.
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
日本の畜産分野では、GHG排出削減と持続可能な畜産が課題。本研究成果は、飼料設計による炭素利用効率向上の可能性を示し、畜産経営の環境負荷低減とコスト削減に寄与し得る。
In the global GX context
Globally, livestock supply chains are under pressure to reduce GHG emissions. This study provides empirical data on carbon flows in pig production, which can inform life-cycle assessments and carbon footprint calculations for pork, aligning with sustainability reporting frameworks like CDP and TCFD.
👥 読者別の含意
🔬研究者:Provides empirical carbon mass balance data for swine, useful for refining LCA models and carbon footprint estimates.
🏢実務担当者:Offers insights into feed formulation strategies that could improve carbon use efficiency and reduce environmental impact.
🏛政策担当者:Informs agricultural GHG mitigation policies by quantifying carbon losses in pig production systems.
📄 Abstract（原文）
Carbon (C) is widely distributed in nature and forms more compounds than all other elements combined. However, when more C is released into the atmosphere as CO 2 and CH 4 than can be reabsorbed by plants the global ecosystem becomes imbalanced. Although pigs emit less CO 2 and CH 4 than ruminants, accurate accounting of the C mass balance and emissions in swine production systems is needed for developing feeding strategies to improve C use efficiency (CUE) and to accurately estimate the carbon footprint of pork supply chains. Improvement in CUE minimizes C losses into the environment, optimizes natural resource use, enhances food security, and improves the economic and environmental sustainability of pork production. Thermal combustion analysis is the most common method for determining total C concentrations in a wide variety of matrices. Analytical results of the C concentration in 80 feed ingredients were highly variable (0.02 to 77% C) within and among feedstuff classifications. There was a strong positive association between fecal C and gross energy (GE) excretion (r = 0.998; P < 0.001) and between urinary C and GE excretion (r = 0.934; P < 0.001), with C excretion corresponding to a daily loss of 10.55 kcal GE/g of C excreted in feces and a loss of 11.91 kcal GE/g of C excreted in urine. On a mass-balance basis, about 14% of dietary C intake is excreted in feces, 2% is excreted in urine, and 25% retained in the whole body as protein and fat. Depending on the method and assumptions used, exhaled C (i.e., CO 2 and CH 4 ) represents the greatest loss of C, representing 50% to 55% of dietary C intake. These results indicate that dietary CUE in growing-finishing pigs is relatively poor (about 25% of C intake) and may be further reduced in pigs subjected to heat stress, immune challenges, and other metabolic disruptions that occur under commercial production conditions.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3389/fanim.2026.1845357first seen 2026-08-07 05:05:46
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