Abstract

Toward an attempt to limit the global warming to 2 °C, there has been an increasing emphasis on devising suitable policies and practices for entrapment and storage of atmospheric CO₂ to mitigate the detrimental effects of climatic change. Agriculture being a predominant global land use, C sequestration under different agro-ecosystems through appropriate management practices is an important option to combat the anthropogenic climate change. Conservation tillage along with residue management, stubble retention, mulching, organic farming and integrated nutrient management not only facilitates soil C storage but also improves soil health. Change in land-uses and cropping system also impart notable effects on soil C turnover. Biochar application is found effective in augmenting soil C stock and improving soil aggregation. Bioenergy plantations are also effective in sequestering C. Simulation models and remote sensing are innovative tools for predicting and mapping soil C status and identifying site-specific strategic policies to minimize the risk of land degradation and to maintain environmental sustainability. Therefore, the aim of this review is to disseminate ideas regarding current C status, identify researchable priorities and to deliberate pros and cons of agricultural management practices for better implementation of soil C sequestration strategies for mitigating the consequences of climate change.

摘要

为了将全球变暖限制在 2 °C，人们越来越重视为大气 CO _{2 的}截留和封存制定合适的政策和实践以减轻气候变化的不利影响。农业是全球主要的土地利用方式，通过适当的管理实践在不同农业生态系统下封存碳是应对人为气候变化的重要选择。保护性耕作连同残留物管理、留茬、覆盖、有机耕作和综合养分管理不仅有利于土壤碳储存，而且还改善了土壤健康。土地利用和耕作制度的变化也对土壤碳周转产生显着影响。发现生物炭的应用在增加土壤碳储量和改善土壤团聚方面是有效的。生物能源种植园也可有效隔离 C. 模拟模型和遥感是预测和绘制土壤碳状况以及确定特定地点的战略政策以最大限度地减少土地退化风险和保持环境可持续性的创新工具。因此，本次审查的目的是传播关于当前碳状况的想法，确定可研究的优先事项，并审议农业管理实践的利弊，以更好地实施土壤碳封存策略以减轻气候变化的后果。