种类和功能多样性调节了植物的营养分配到砍伐森林中的生物质积累
Zhaopeng Song1, Xuemei Wang2, Jiahui Zhang3
1State Key Laboratory of Environmental Criteria and Risk Assessment, MEE Key Laboratory of Regional Eco-process and Function Assessment, Chinese Research Academy of Environmental Sciences, 8 Dayangfang, Beijing, 100012, China.
Journal of environmental management
|June 5, 2025
概括
选择性伐木通过优化营养物质的分配,特别是 (N) 和 (P) 的分配来增强森林生物质的积累,这种分配随着时间的推移受到物种和功能多样性的影响. 森林管理应促进固定工厂,以增加碳库存.
科学领域:
- 林业和生态 林业和生态
- 营养素循环循环的过程
- 植物生理学 植物生理学
背景情况:
- 选择性伐木是一种常见的森林管理实践,但其对营养物质分配和生物质积累的影响尚不清楚.
- 了解营养分配策略对于可持续的森林管理和最大限度地在砍伐森林中捕获碳至关重要.
研究的目的:
- 研究如何在地面和地下生物量之间分配营养物质,以调节选择性伐木后社区生物量积累.
- 量化韩国松树林中营养分配,物种多样性,功能多样性和生物质积累之间的关系.
主要方法:
- 在中国东北地区,研究了低强度选择性伐木后恢复年数不同 (6-100年) 的森林区域.
- 在叶子,根和土壤中测量了营养含量 (N,P),以及234个物种的植物功能特征.
- 在地面和地下 (bSMA) 之间量化营养物质分配策略及其对生物质积累的贡献.
主要成果:
- 在树木,灌木和草本植物中, (N) 的利用在树叶中比根更稳定 (bSMA = 0.800.87).
- (N) bSMA随着森林恢复年增加,与社区生物质呈正相关性 (解释了45%的变化).
- 营养物质分配对生物质的贡献被功能 (0.40) 和物种多样性 (0.33) 间接调节.
结论:
- 树木中 (N) 的分配和 (P) 的分配在底层物种中是生物质积累的关键,与功能多样性有关.
- 森林管理策略应包括种植N固定植物,特别是底层植物,以加强物种间竞争,营养循环和砍伐森林中的碳储量.
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