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在中国洛斯高原植被恢复期间,土壤聚合碳成分和对植物输入的反应的变化,中国洛斯高原植被恢复期间

Yaoyue Liang^1,2, Jingbo Fang^1,2, Wenjing Jia^1,2

¹College of Agronomy, Northwest A&F University, Xianyang 712100, China.

Plants (Basel, Switzerland)

|September 14, 2024

概括

植被恢复对土壤碳有影响. 表面聚合物获得碳,而深层聚合物从根部积累惰性碳,改变有机碳成分.

科学领域:

土壤科学土壤科学
生态生态学生态生态学
生物地质化学生物地质化学

背景情况:

植被恢复是缓解气候变化和土壤碳捕获的关键.
恢复改变了土壤聚合物的碳循环和特性,对表面和地下土壤产生不同的影响.
了解植物碳输入对聚合碳成分的影响至关重要.

研究的目的:

在洛斯高原*Robinia pseudoacacia*森林恢复期间分析土壤聚合物的有机碳功能组变化.
为了将植被恢复效应与农田进行比较.
澄清有机碳化学结构与聚合碳含量之间的关系,揭示分布机制.

主要方法:

福利埃变换近红外光谱法 (FTIR) 用于分析有机碳的功能组.
从0-20厘米,20-40厘米和40-60厘米深度收集了土壤样本.
聚合物分量 (>0.25毫米和<0.25毫米) 分析了碳成分特征.

主要成果:

表面土壤聚合物显示有机碳含量增加 (1.973.78 g·kg−1) 和恢复后的稳定性.
较大的聚合物 (>0.25毫米) 减少了多糖和增加了芳香/异质功能群;较小的聚合物 (<0.25毫米) 显示了相反的趋势.
根源输入有助于深层土壤中持久的惰性碳积累,垃圾的影响随着深度的增加而减少.

结论:

植被恢复显著改变土壤聚合物有机碳的组成和分布.
聚合物大小影响碳功能组对植被恢复的反应.
根源来源的碳在深层土壤中长期封存碳中起着至关重要的作用.

关键词:

洛斯高原 (Loess Plateau) 是一个高原.有机碳成分有机碳成分有机功能组是有机的功能组.土壤聚合物土壤聚合物植被恢复植被恢复

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