脆弱な東ヒマラヤ生態系における炭素隔離のための自然基盤型解決策としての果樹ベース農林業：地球変動の文脈における植物–土壌微生物フィードバック
Fruit tree-based agroforestry as a nature-based solution for carbon sequestration in the vulnerable Eastern Himalayan ecosystem: plant–soil microbe feedbacks in the context of global change (原題)
Ashish Singh, Uttam Kumar Sahoo
🤖 gxceed AI 要約
日本語
インド北東部の東ヒマラヤにおいて、20年生の果樹ベース農林業システム（FBS）6種と隣接農地を比較し、土壌炭素・微生物バイオマス炭素・窒素を0〜1mの6層で評価した。FBS土壌は全炭素・有機炭素・微生物バイオマス炭素・全窒素が有意に高く、特にモモとカシマンダリンで炭素蓄積が最大となった。植物–土壌–微生物の正のフィードバックが示唆され、気候スマートな土地利用戦略としての有効性を実証している。
English
A field study in the Eastern Himalayas compared six 20-year-old fruit tree-based agroforestry systems (FBS) with adjacent cropland across six soil depths (0–1.0 m). FBS soils showed significantly higher total carbon (+5–28%), organic carbon (+2–29%), microbial biomass carbon (+13.5–35%), and total nitrogen (+16–38%), with peach and Khasi mandarin storing the most carbon. Results support FBS as a climate-smart land-use strategy via positive plant–soil–microbe feedbacks.
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
日本企業のScope 3や森林クレジット、J-クレジット制度における農林業由来の炭素吸収源評価に関連する。ただし対象地はインド北東部であり、日本のGX政策・開示制度への直接的な示唆は限定的。
In the global GX context
This study contributes empirical evidence on nature-based carbon sequestration in mountain agroecosystems, relevant to global discussions on land-sector carbon accounting and nature-based solutions under frameworks like SBTi FLAG and CSRD. However, its geographic specificity to the Eastern Himalayas limits direct transferability to mainstream global disclosure practice.
👥 読者別の含意
🔬研究者:農林業システムにおける植物–土壌–微生物フィードバックと炭素隔離の実証データを提供する。
🏢実務担当者:農林業由来の炭素クレジットやScope 3土地利用排出の評価に関心のある企業に参考となる。
🏛政策担当者:気候スマート農業政策や自然基盤型解決策の設計において、地域固有の炭素蓄積ポテンシャルの証拠を提供する。
📄 Abstract（原文）
Fruit tree–based agroforestry systems (FBS) represent a promising nature-based solution for enhancing carbon storage and sequestration, restoring soil health, and supporting livelihood security in the fragile Eastern Himalayan ecosystems. We evaluated six fully grown, uniform, 20-year-old FBS: guava, peach, Assam lemon, pear, plum and Khasi mandarin against adjacent cropland at the ICAR Research Complex for the North Eastern Hill Region, India. A total of 126 composite soil samples were collected across six depth intervals (0–1.0 m) to assess total carbon (TC), total organic carbon (TOC), total inorganic carbon (TIC), soil microbial biomass carbon (SMBC), total nitrogen (TN), carbon fractions (C VL , C L , C LL , C NL ) and carbon stocks, while above- and belowground biomass, seasonal litter fall and leaf carbon inputs were quantified using allometric and field-based measurements. Aboveground biomass ranged from 22.68 to 31.98 Mg ha −1 and belowground biomass from 5.9 to 8.31 Mg ha −1 . Compared with cropland, FBS soils exhibited significantly ( p < 0.05) greater TC (+5–28%), TOC (+2–29%), SMBC (+13.5–35%), and TN (+16–38%). Peach-based systems recorded the highest SMBC (551.1 μg g −1 ), indicating enhanced microbial biomass and activity. The very labile carbon (C VL ) fraction was 8.5–33.7% higher under FBS than cropland, reflecting increased substrate availability for microbial metabolism and patterns consistent with positive plant–soil–microbe feedbacks. Perennial fruit trees sustained microbial activity at greater soil depths, a pattern consistent with deeper rhizosphere influence from fine-root networks. Total carbon stocks were highest under Khasi mandarin (279.0 Mg ha −1 ) and peach (274.3 Mg ha −1 ) at 0–1.0 m depth. The study provides integrated empirical evidence that FBS enhances both labile and stable soil carbon storage through patterns consistent with positive plant–soil–microbe interactions and litter-derived carbon inputs, functioning as an effective climate-smart land-use strategy for carbon storage in mountain ecosystems of Eastern Himalaya.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3389/ffgc.2026.1921800first seen 2026-09-16 04:39:57
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