完整的树木生物质,根碳库存和营养使用效率跨年在树中站在苗木和树系统下
Gardenia Gonçalves de Oliveira1,2, Túlio Barroso Queiroz1,3, Bronson P Bullock3
1Department of Forest, Soil and Environmental Sciences, College of Agricultural Sciences, São Paulo State University-UNESP, Botucatu 18610-034, SP, Brazil.
Plants (Basel, Switzerland)
|May 14, 2025
概括
采摘的树树种群比种植的树种产生更高的生物质和碳封存. 不同的管理系统需要量身定制的施肥,以实现最佳的营养使用和森林可持续性.
科学领域:
- 林业科学 林业科学
- 生态系统生态学生态学
- 生物地质化学生物地质化学
背景情况:
- 可持续的森林管理取决于了解生物质和营养物质在收获后的动态.
- 树种植园对于木材生产至关重要,需要有效的管理策略.
- 砍伐和种植是影响森林生产力和碳循环的关键林业系统.
研究的目的:
- 为了评估Eucalyptus urophylla在种植和coppicing系统下的生物质和营养积累.
- 为了比较两个管理系统之间的碳捕获潜力.
- 为了提高生产力和可持续性,为不同的受精策略提供信息.
主要方法:
- 在八种治疗方法 (四个年龄,两个系统) 中评估了1152棵树.
- 估计的地面生物量 (10棵树/处理) 和根生物量 (8棵树在3岁和5岁).
- 确定营养度和计算的生物质扩张系数 (BEF) 和根与芽的比率 (R).
主要成果:
- 种植系统实现了较高的总生物质 (153 Mg ha-1),而不是种植 (119 Mg ha-1).
- 采摘的树木表现出更大的根积累和碳捕集 (≈17.2 t C ha-1).
- 生物利用系数 (BUC) 根据营养素和系统而异;N/P在种植中更高,Mg在结合中更高.
结论:
- 摘花增强了欧树中的生物质积累和碳捕获.
- 不同的营养动态需要特定系统的受精策略.
- 优化受精支持提高生产率,营养效率和提高碳库存.
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