管理良好的草是碳储存和稳定人类化的亚马逊土壤的关键策略
S Tenelli1, A F Nascimento2, F P Gabetto1
1Brazilian Biorenewables National Laboratory, National Center for Research in Energy and Materials (LNBR/CNPEM), Rua Giuseppe Máximo Scolfaro 10000, Polo II de Alta Tecnologia, Campinas, SP, 13083-100, Brazil; "Luiz de Queiroz" College of Agriculture, University of São Paulo (ESALQ/USP), Av. Pádua Dias 11, Piracicaba, SP, 13418-900, Brazil.
Journal of environmental management
|December 19, 2024
概括
恢复亚马逊退化土壤,以综合作物和牲畜或管理良好的牧场,可以显著增加土壤碳库存. 这些系统通过提高聚合物稳定性和矿物联体来增强碳稳定性,有助于在人类化土壤中储存碳.
科学领域:
- 土壤科学 土壤科学
- 农业学是一种农业学.
- 环境科学 环境科学
背景情况:
- 亚马逊地区人类使用的土壤历来面临碳 (C) 库存的枯竭.
- 最近对牧场恢复和综合农业系统的转变显示了土壤C积累的潜力.
研究的目的:
- 在巴西南部的不同土地利用系统中,量化土壤C变化超过11年.
- 在人类化的亚马逊土壤中识别C稳定机制.
- 为了比较四个土地利用系统:作物继承 (CS),综合作物-牲畜 (ICL),综合作物-牲畜-森林 (ICLF) 和管理良好的牧场 (MP).
主要方法:
- 在11年的实地实验中,评估了四种不同的土地利用系统.
- 测量土壤C储量和积累率.
- 使用X射线光电子光谱学分析聚合物稳定性,矿物相关有机碳 (MAOC) 和反抗性C组.
主要成果:
- 采用管理良好的草地 (MP,ICL) 的土地利用系统显著增加了土壤C库存,特别是在前10厘米.
- 与基线相比,ICL和MP系统显示C积累率为0.68-0.95 Mg C ha-1 yr-1 .
- MP和ICL显示了增强的总稳定性和更高的MAOC;MP比其他系统具有更强硬的C组.
结论:
- 长期使用经过良好管理的牧场或综合作物畜牧系统有效地提高了亚马逊土壤中的碳储存.
- 碳化合物稳定的机制包括聚合物内阻塞,矿物吸附和增加的化学回.
- 这些综合系统为增加人类影响的亚马逊土壤中碳封存提供了可行的策略.
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