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生物炭影响有机碳的组成和稳定性在高度酸性的茶叶种植园土壤

Qiang Li¹, Junchuan Zhang², Jing Ye³

¹College of Resources and the Environment, Fujian Agriculture & Forestry UniversityFuzhou, 350002, China; Resources, Environment, and Soil Fertilizers Institute, Fujian Academy of Agricultural Sciences /Fujian Key Laboratory of Agricultural Ecological Process of Red Soil Mountain, Fuzhou, 350013, China.

Journal of environmental management

|October 8, 2024

概括

生物炭的应用改善了土壤有机碳 (SOC) 和酸性茶土的聚合物稳定性. 较高的生物炭率增加了土壤pH,SOC和宏积分,提高了碳弹性.

科学领域:

土壤科学土壤科学
环境化学环境化学
农业学是一种农业学.

背景情况:

生物炭修正案增强了土壤有机碳 (SOC) 和聚合物的稳定性.
生物炭对高度酸性土壤和SOC稳定性的影响存在有限的研究.
酸性茶田土壤对土壤健康管理提出了独特的挑战.

研究的目的:

在八年内调查生物炭对聚合物分布和SOC稳定性在酸性茶土中的影响.
分析SOC分量的变化,包括微粒有机碳 (POC) 和矿物相关有机碳 (MAOC).
确定影响SOC稳定性的生物炭应用率和土壤特性之间的关系.

主要方法:

实地实验使用不同的生物炭应用速率 (0到40t ha-1).
对土壤pH,SOC,POC,MAOC,与铁结合的有机碳 (OC-Fe) 和溶解的有机碳 (DOC) 的分析.
评估聚合分布 (宏聚合含量,平均重量直径-MWD) 和SOC功能组.
统计分析包括主要组件分析和结构方程建模.

主要成果:

生物炭的应用显著增加了土壤的pH,SOC,POC和MAOC含量.
较高的生物炭率导致宏积分含量和MWD增加,改善了土壤结构.
溶解有机碳 (DOC) 和OC-Fe含量下降,而芳香C含量随着生物炭的应用而增加.
土壤pH,TN,SOC,POC,MAOC,R>0.25和MWD被确定为SOC稳定的关键因素.

结论:

生物炭有效地提高了土壤聚合物的稳定性和高酸性茶土中的SOC含量.
增加的芳香碳含量和改善的土壤物理特性有助于提高有机碳的弹性.
在具有挑战性的酸性环境中,生物炭的应用为改善土壤质量和碳封存提供了可行的策略.

关键词:

生物炭是一种生物炭.高酸性土壤高度酸性土壤土壤有机碳土壤有机碳土壤有机碳稳定性土壤有机碳稳定性茶园茶园是一个茶园.

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