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土壤特异性酶活性为土壤微生物死体积累在沙丘固定期间提供了新的洞察力

Qing Qu^1,2, Xuying Hai³

¹Sichuan Philosophy and Social Key Laboratory of Monitoring and Assessing for Rural Land Utilization, School of History, Geography and Tourism, Chengdu Normal University, Chengdu, China.

Frontiers in microbiology

|October 13, 2025

概括

沙丘固定增强了土壤特定的酶活动,如土壤有机碳酶活性 (SOCE) 和微生物生物质碳酶活性 (MBCE). 这些活动是评估微生物死体碳和沙地土壤有机碳积累的关键指标.

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:

土壤酶对于植物生长和土壤碳循环至关重要.
传统的每块土壤单位的酶活性测量可能不足.
每个土壤有机碳 (SOCE) 或微生物生物质碳 (MBCE) 的土壤特异性酶活性越来越多地用于评估土壤碳积累.

研究的目的:

系统地检查沿沙丘固定梯度的SOCE和MBCE的变化.
探索土壤特异性酶活性与土壤微生物死体碳 (NC) 和土壤有机碳 (SOC) 积累之间的关系.
评估SOCE和MBCE作为退化沙生态系统指标的实用性.

主要方法:

在沙丘固定的四个阶段评估SOCE和MBCE:移动,半移动,半固定和固定.
测量了包括β-1,4-葡萄糖酶,β-D-细胞生物酶,β-1,4-N-乙葡萄糖胺酶和L-氨酸氨基酶在内的特定酶活性.
分析了土壤酶活性系数 (SEAC) 和酶活性几何平均值 (GMEA).

主要成果:

SOCE和MBCE,SEAC和GMEA在半移动,半固定和固定沙丘中明显高于移动沙丘.
土壤特异性酶活动 (SOCE,MBCE,SEAC,GMEA) 与微生物NC和SOC有显著的积极关系.
土壤特异性酶活性解释了微生物NC变异的32.2%和SOC变异的24.1%.

结论:

沙丘固定显著增加了SOCE和MBCE.
建议SOCE和MBCE的变化作为评估微生物NC和SOC积累的可靠指标.
这种方法对退化的沙地生态系统特别有价值.

关键词:

退化退化退化草原是一片草地.微生物是一种微生物.收回回收回收的恢复土壤酶活性土壤酶活性土壤营养物质土壤营养物质

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