The contribution of land uses in sequestering soil carbon (C) is a key question of research in tropical regions, where C emissions due to land use changes, extreme rainfall events and high temperatures can aggravate the global issue of climate change. In the present study, different pools of soil organic C were assessed, from shifting cultivation lands (jhum), rubber, tea garden and coffee plantations of Tura district in Meghalaya, which is located in Northeastern region (NER) of India. To achieve this goal, different parameters such as bulk density (BD), total organic carbon (TOC) and C pools, viz., very labile (CVL), labile (CL), less labile (CLL) and non-labile (CNL) were analyzed. The results indicated significant correlations among TOC and C pools in most land uses, except for CNL pool. Tea gardens showed the highest value of TOC stock (62.75 ± 1.47 t C ha-1) while the lowest was found in the jhum lands (33.34 ± 5.04 t C ha-1). Similarly, both the active (12.03 mg g-1) and passive (4.60 mg g-1) C pools were highest under tea gardens. CVL was found to be positively correlated with TOC and active carbon pool (ACP), while CLL was also positively correlated with passive carbon pool (PCP). This study indicates the potential of tea gardens as a promising C sequestering land use, which can be promoted in jhum lands to mitigate the negative impacts of climate change.

中文翻译：

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研究了梅加拉亚邦（Meghalaya）盖罗山（Garo hills）不同土地管理系统下的总有机碳与土壤碳库之间的关系。

在热带地区，土地使用对固碳的贡献是一个关键的研究问题，热带地区的土地使用变化，极端降雨事件和高温造成的碳排放会加剧全球气候变化问题。在本研究中，评估了位于印度东北地区（NER）的梅加拉亚邦Tura区的耕地（jhum），橡胶，茶园和咖啡种植园的不同土壤有机碳库。为了实现此目标，需要使用不同的参数，例如堆密度（BD），总有机碳（TOC）和碳库，即非常不稳定（CVL），不稳定（CL），较不稳定（CLL）和非不稳定（CNL） ）进行了分析。结果表明，除CNL池外，大多数土地利用中TOC和C池之间存在显着相关性。茶园的TOC存量最高（62。75±1.47 t C ha-1），而最低的是在杂草丛中（33.34±5.04 t C ha-1）。同样，在茶园中，主动（12.03 mg g-1）和被动（4.60 mg g-1）C池都最高。发现CVL与TOC和活性碳库（ACP）正相关，而CLL也与被动碳库（PCP）正相关。这项研究表明，茶园作为隔离碳的土地利用的潜力，可以在垃圾土地上推广，以减轻气候变化的负面影响。而CLL与被动碳库（PCP）也呈正相关。这项研究表明，茶园作为隔离碳的土地利用的潜力，可以在垃圾土地上推广，以减轻气候变化的负面影响。而CLL与被动碳库（PCP）也呈正相关。这项研究表明，茶园作为隔离碳的土地利用的潜力，可以在垃圾土地上推广，以减轻气候变化的负面影响。