Regulating Effect of Mixed Cropping of Green Manure Varieties on Greenhouse Gas Emissions in a Green Manure–Wheat Rotation System Under Reduced Nitrogen Conditions
減窒素条件下での緑肥-小麦輪作体系における緑肥品種の混作が温室効果ガス排出に与える制御効果 (AI 翻訳)
Xingjian Jin, Ke Xu, Zhengpeng Li, Xiaojun Wang, Qingbiao Yan, Kaibin Qi, Falong Hu, Tianlong Chen, Mei Han
🤖 gxceed AI 要約
日本語
青海高原の春小麦生産において、30%の窒素削減と緑肥混作（特に共通ビッチと菜種の混作）により、地球温暖化係数（GWP）と温室効果ガス強度（GHGI）を低減しつつ収量を維持できることを実証。土壌中のアンモニウム態窒素と硝酸態窒素がGHGIの主要な駆動因子であることを特定。
English
A two-year field experiment on the Qinghai Plateau demonstrates that a 30% nitrogen reduction combined with mixed cropping of common vetch and rapeseed reduces global warming potential (GWP) by 7.45% and greenhouse gas intensity (GHGI) by 2.92% while maintaining wheat yield. Soil ammonium and nitrate nitrogen are key drivers of GHGI.
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
日本の農業分野におけるGHG削減策として、緑肥利用と窒素施肥削減の組み合わせは参考になる。特に、北海道などの寒冷地での春小麦生産への応用が考えられる。
In the global GX context
This study provides empirical evidence for low-carbon spring wheat production in ecologically fragile regions, relevant to global efforts in agricultural GHG mitigation and sustainable intensification.
👥 読者別の含意
🔬研究者:Provides field-level data on GHG trade-offs under nitrogen reduction and intercropping strategies.
🏢実務担当者:Suggests specific green manure mixtures (e.g., common vetch + rapeseed) for farmers to reduce emissions without yield loss.
🏛政策担当者:Supports policies promoting nitrogen fertilizer reduction and green manure adoption in temperate wheat systems.
📄 Abstract（原文）
To explore low-carbon spring wheat production strategies for the ecologically fragile Qinghai Plateau, a two-year field experiment was conducted using a split-plot design. The main plots were set with three nitrogen (N) application levels: N0 (0 kg·ha−1, no N input), N1 (157.5 kg·ha−1, 30% N reduction relative to conventional rate), and N2 (225 kg·ha−1, the conventional rate). The subplots comprised four green manure mixed cropping patterns: sole cropped common vetch (CK), common vetch mixed with hull-less barley (HB), common vetch mixed with hairy vetch (HV), and common vetch mixed with rapeseed (RS). Averaged across green manure treatments, N1 reduced global warming potential (GWP) by 14.56% and greenhouse gas intensity (GHGI) by 16.89% compared with N2. Under the N1 treatment, compared with CK, RS reduced cumulative CO2 emissions by 7.77% and GWP by 7.45%, maintained wheat grain yield comparable to those under N2, and obtained the minimum GHGI which was 2.92% lower than CK. Regarding soil properties, all green manure patterns significantly increased soil available phosphorus (AP) and available potassium (AK) compared with CK. Specifically, HB increased AP by 12.81% and AK by 16.38%, and RS also increased AP by 4.37% and AK by 2.36%. In addition, HB enhanced soil organic matter (SOM) by 5.85%, ammonium nitrogen (NH4–N) by 8.13%, and nitrate nitrogen (NO3–N) by 4.34%. Soil NH4–N and NO3–N were identified as key drivers of GHGI across treatments. On the Qinghai–Tibet Plateau, a 30% N reduction combined with target-oriented green manure mixtures—RS for emission mitigation and HB for high yield and fertility—offers a viable low-carbon strategy for spring wheat production.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.3390/plants15142194first seen 2026-07-20 05:57:29
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