稀释强度提高了土壤的多功能性和微生物残留对中国树种植园中有机碳封存的贡献
Ting He1, Junjie Lei2, Yuanying Peng3
1College of Forestry, Central South University of Forestry and Technology, Changsha 410004, China.
Plants (Basel, Switzerland)
|February 26, 2025
概括
中等强度的稀释 (30%) 最好促进中国树种植园的土壤微生物生物质和碳循环. 这种森林管理策略通过优化微生物残留碳积累来增强土壤碳捕获.
科学领域:
- 林业科学 林业科学
- 土壤科学 土壤科学
- 生态生态学 生态生态学
背景情况:
- 土壤的多功能性对于碳捕获至关重要.
- 森林稀疏的做法可以改变土壤微生物活动和碳循环.
- 稀释强度对微生物残留碳 (MRC) 的影响尚不清楚.
研究的目的:
- 评估不同稀释强度对中国树种植园土壤多功能性的影响.
- 确定最佳的稀释策略,以增强土壤碳捕获.
主要方法:
- 应用了四种稀释处理:控制 (CK,0%),轻 (LIT,20%),中 (MIT,30%) 和高 (HIT,45%).
- 土壤营养供应,微生物生物质 (包括PLFA,MBC,MBN),酶活性和微生物残留碳 (MRC) 在稀释后五年被评估.
- 分析了MRC和土壤特性 (SOC,TN,AN,EOC) 之间的相关性.
主要成果:
- 稀释强度显著影响了土壤营养素和微生物生物量; MIT 和 HIT 显示营养水平较高.
- 酶活性在LIT中达到峰值,而微生物生物质在CK和MIT中最高,在HIT中显著下降.
- 中等强度稀释 (MIT) 和控制 (CK) 显示了土壤表层中微生物残留碳 (MRC) 含量最高.
结论:
- 中等强度的稀释 (30%) 有效地促进了微生物生物质,并增强了中国树林土壤中的碳循环.
- 这种稀释强度对于旨在增加土壤碳捕获的森林管理策略来说是最佳的.
- 森林稀薄的强度是影响土壤微生物动态和碳储存的关键因素.
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