的限制有助于土壤碳储存在长期化肥暴露在北极森林中的土壤碳储存
Etienne Richy1, Tania Fort1, Inaki Odriozola1
1Laboratory of Environmental Microbiology, Institute of Microbiology of the Czech Academy of Sciences, Prague 4, Czech Republic.
Global change biology
|September 23, 2024
概括
将气添加到北极森林中可以促进树木生长和碳储存. 然而,土壤的碳增加取决于营养平衡,因为添加可以刺激降解有机物质的微生物.
科学领域:
- 森林生态 森林生态
- 生物地质化学生物地质化学
- 土壤科学 土壤科学
背景情况:
- 玻里亚森林是重要的碳汇,但营养的可用性限制了树木的生长和土壤的碳捕获.
- 了解营养物质的影响是预测森林碳循环和气候变化缓解的关键.
研究的目的:
- 研究,和添加对北极森林中的树木生产力和土壤碳储存的长期影响.
- 为了确定增强树木生长是否会导致碳捕获增加,或者微生物分解是否会抵消这些收益.
主要方法:
- 一个长达60年的实地实验,涉及长期营养物质 (N,P,Ca) 施肥 *Pinus sylvestris *北极森林.
- 测量树木生物质的生产和土壤碳库存在不同的施肥处理.
- 分析微生物群落组成,真菌生物质和有机物质降解.
主要成果:
- 肥,单独或与P和/或Ca,增加了50%的树木生物质和65%的土壤碳.
- 同时应用N和P酸化土壤,增加真菌生物质,增强有机物降解,表明碳库存的微生物调节.
- 没有的添加增加了土壤碳,可能是由于限制了微生物活动.
结论:
- 长期添加气可以提高北极森林的生产力和碳捕获,有助于减缓气候变化.
- 对土壤碳的净影响取决于环境,受其他营养素 (如) 和微生物社区反应的相互作用的影响.
- 仔细考虑营养固态度对于最大限度地提高北极森林的碳捕集潜力至关重要.
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