在不同高度的九棵树的阴影下接收的分散PAR辐射和夏天阴天之间的光谱比较
Gonzalo Gurrea-Ysasi1, Vicente Blanca-Gimenez1
1Instituto COMAV, Edif. 8E, Acceso J, Ciudad Politécnica de la Innovación, Universitat, Politècnica de València, Valencia, Spain.
Photochemistry and photobiology
|January 27, 2025
概括
在不同树的阴影下,植物的光线暴露有很大差异. 树的阴影提供了高的光合作用光子流量密度 (PPFD),而橄树的阴影获得的最小,影响植物的性能.
科学领域:
- 植物生理学 植物生理学
- 环境科学 环境科学
- 森林生态 森林生态
背景情况:
- 了解光的可用性对于植物生长和光合作用效率至关重要.
- 树冠显著改变光谱质量和数量到达底层.
- 空间定位,天花板密度和高度影响光线的透.
研究的目的:
- 在各种树的阴影和高度下分析光谱太阳光合成光子流量密度 (PPFD).
- 为了比较阳光明的一天不同树冠的光线条件与阴云的开放空间.
- 确定不同树种如何影响到植物光合作用地面的光.
主要方法:
- 测量PPFD (380-780nm) 在西班牙瓦伦西亚的九种不同树种 (树,绿杉,珀树,松树,橄树,树,树,树,树,红杉) 下进行.
- 在2022年7月至8月期间在阳光明的一天收集的数据,并与在开放区域的阴天进行比较.
- 分析不同高度和不同时间 (10h和13h) 的光强度.
主要成果:
- 在树的阴影下,在阴天和阳光明的开放条件下记录了更高的PPFD水平.
- 橄树的阴影提供了最低的PPFD,在蓝光区域的光谱最大值.
- 在10h时,PPFD与测量高度成比例,但在13h时反比例.
结论:
- 树极大地影响了植物的光线可用性,物种之间存在很大的差异.
- 橄树和树在光强度方面创造出不同的微气候.
- 光强度和高度之间的关系是动态的,受到白天时间和太阳角度的影响.
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