Soil carbon storage in Brazilian drylands: A review

IF 5.7 1区农林科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Catena Pub Date : 2025-05-20 DOI:10.1016/j.catena.2025.109144

Lucas T. Greschuk , João M. Villela , Stoécio Malta Ferreira Maia , Carlos Roberto Pinheiro Junior , Rafael G. Tonucci , Diana Signor , Leidivan A. Frazão , Antonio Yan Viana Lima , Lucas P. Canisares , Hermano Melo Queiroz , Carlos E.P. Cerri , Maurício R. Cherubin

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引用次数: 0

Abstract

Agricultural systems that promote soil organic carbon (SOC) sequestration need to be implemented to mitigate climate change. The scientific literature indicates that integrated agricultural systems (IASs) can increase SOC stocks across various regions globally. However, information on the influence of IASs on SOC stock in Brazilian drylands is still scarce. Therefore, this study aims to investigate the effect of land use and climate classes on SOC stock and total nitrogen (TN) stock in the Brazilian drylands. Forty-eight studies were selected to extract data on SOC and TN stocks in croplands, pasturelands, IASs, and native vegetation. A linear mixed model was used to assess the effect of land use and climate classes on SOC stock and TN stock. SOC stocks (0–50 cm) were higher (p < 0.05) in native vegetation (86.6 Mg C ha⁻¹), IASs (87.6 Mg C ha⁻¹), and pasturelands (78.2 Mg C ha⁻¹) than in croplands (60.3 Mg C ha⁻¹). The IASs had the lowest TN stocks, possibly due to the high input of residues with a high C/N ratio from forestry components. Less literature data is available for IASs regarding SOC stock and TN stock than for other land uses. In conclusion, the adoption of IASs shows potential to mitigate SOC losses, but caution is advised when extrapolating our numerical findings due to the limited data availability in the Brazilian drylands. This review highlights the importance of combining land use and climate class analyses to design targeted strategies for enhancing SOC accrual and promoting resilience in Brazilian drylands.

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巴西旱地土壤碳储量研究进展

为了减缓气候变化，需要实施促进土壤有机碳（SOC）封存的农业系统。科学文献表明，综合农业系统（ias）可以增加全球不同地区的有机碳储量。然而，关于ias对巴西旱地SOC储量影响的信息仍然很少。因此，本研究旨在探讨不同土地利用方式和气候类型对巴西旱地土壤有机碳储量和总氮储量的影响。选取48个研究项目，提取农田、草地、人工湿地和原生植被的有机碳和全氮储量数据。采用线性混合模型评价了土地利用方式和气候类型对土壤有机碳储量和全氮储量的影响。SOC储量（0 ~ 50 cm）较高(p <；0.05)，原生植被（86.6 Mg C ha−1）、国际生态系统（87.6 Mg C ha−1）和牧场（78.2 Mg C ha−1）的含量高于农田（60.3 Mg C ha−1）。国际区全氮储量最低，可能是由于林业组分碳氮比高的残体输入量大。与其他土地利用方式相比，土壤有机碳储量和全氮储量的文献资料较少。综上所述，采用ias显示出减轻SOC损失的潜力，但由于巴西旱地有限的数据可用性，建议在推断我们的数值结果时谨慎。这篇综述强调了结合土地利用和气候类别分析来设计有针对性的策略的重要性，以提高巴西旱地土壤有机碳积累和促进恢复力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catena 环境科学-地球科学综合

CiteScore

10.50

自引率

9.70%

发文量

816

审稿时长

54 days

期刊介绍： Catena publishes papers describing original field and laboratory investigations and reviews on geoecology and landscape evolution with emphasis on interdisciplinary aspects of soil science, hydrology and geomorphology. It aims to disseminate new knowledge and foster better understanding of the physical environment, of evolutionary sequences that have resulted in past and current landscapes, and of the natural processes that are likely to determine the fate of our terrestrial environment. Papers within any one of the above topics are welcome provided they are of sufficiently wide interest and relevance.