在与入侵植物竞争的本土豆类对固定的依赖性增加
Meixu Han1, Haiyang Zhang2, Mingchao Liu3
1College of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
Plant diversity
|September 16, 2024
概括
像Xanthium strumarium这样的侵入性植物可以通过耗尽土壤气,增加豆类,从而超越像Glycine max这样的本地豆类.
科学领域:
- 植物生态学植物生态学
- 侵入性物种 生物学 生物学
- 植物与微生物的相互作用
背景情况:
- 外来植物经常抑制本地植物根和共生微生物,以获得竞争优势.
- 了解入侵植物和本地植物在获取营养方面如何相互作用,对于入侵生态至关重要.
- 量-活动框架为研究这些复杂的相互作用提供了一个镜头.
研究的目的:
- 研究一种入侵植物 (Xanthium strumarium) 和一种本土豆类植物 (Glycine max) 之间的跨物种竞争对根和共生微生物特征的影响.
- 量化根和结节数量和活动的变化,以及在单一栽培和混合种植下在两种物种中的菌根殖民.
- 阐明入侵植物影响本地豆类营养获取的机制.
主要方法:
- 进行了一项盆栽实验,使用Xanthium strumarium和Glycine max的单种植和混合种植.
- 测量包括细根生物质,表面积,度,酸酶活性,结节生物质,结节固活性和菌根殖民.
- 分析了固定对叶子含量和树根球土壤的贡献.
主要成果:
- 在混合种植中,Glycine max表现出细根数量和活性下降,结节量减少,但结节活性显著增加 (106%).
- 在Glycine max中,菌根植入不受影响,而由于根系球土壤耗尽,其叶子的固贡献增加了.
- 与单一种植相比,Xanthium strumarium表现出根数量和活动的增加,并在混合种植中增强了菌根协会.
结论:
- 桑树 (Xanthium strumarium) 在竞争中取代了本土的甘 (Glycine max),不是通过直接吸收固定气,而是通过耗尽树根球土壤气.
- 这种耗尽刺激了Glycine max的固活动,增加了它对这种营养来源的依赖.
- 量活动框架是研究本地豆类对外来植物入侵的反应的一个有价值的工具.
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