添加气影响了Cunninghamia lanceolata-Phoebe chekiangensis混合种植园中的根竞争
Shuya Yang1, Lita Yi1, Jingru Wang1
1State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Hangzhou, China.
Physiologia plantarum
|March 26, 2024
概括
添加会加剧混合种植园中的根竞争,将策略从宽容转变为积极竞争. 这影响了生物量和根生长,特别是在Cunninghamia lanceolata.
科学领域:
- 生态生态学 生态生态学
- 植物生物学 植物生物学
- 环境科学 环境科学
背景情况:
- 在混合物种种植园中,地下竞争的研究不足.
- 增加 (N) 沉积是一个重要的环境变化.
研究的目的:
- 研究N添加对针叶树 (Cunninghamia lanceolata) 和宽叶树 (Phoebe chekiangensis) 种类之间的根竞争的影响.
- 了解沉积如何改变混合种植园中的植物相互作用和竞争策略.
主要方法:
- 在混合种植园中,对C.lanceolata和P.chekiangensis进行了盆栽实验.
- 治疗包括N添加 (45公斤N ha-1 yr-1) 或没有N添加.
- 生物质分配,根形态,根生长和竞争能力在五个月后被评估.
主要成果:
- 在混合条件下,N添加减少了两种物种的生物质积累.
- 此外,由于竞争加剧,N还对C.lanceolata根的生长产生了负面影响.
- 此外,P. chekiangensis转向了根捕食竞争,而C. lanceolata则转向了对等性病的优势.
结论:
- 添加气显著影响混合种植园的根竞争动态.
- 沉积改变了竞争策略,有利于积极的竞争而不是容忍.
- 这些发现对了解大气中N沉积量增加的植物相互作用有意义.
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