overstory ['əuvə'stɔ:ri]

overstory的基本解释

n.

[农]上层林冠, 上层林

与overstory相关的网络例句 [注：此内容来源于网络，仅供参考]

Reproduce naturally in the open rather than under an overstory.

宁在空旷地而不是树冠下自然繁殖。

The results showed that there are almost the same species composition in the overstory as in the understory at current stage, and the species composition would not be change on large scale in short-term time without a big disturbance.

结果显示，现阶段林分上层与下层群落几乎有共同的物种组成，若无大型干扰下，短期内物种组成不致产生明显改变。

These tropical trees of life provide housing and recreational facilities while mimicking the five layers found within a tropical rainforest: the overstory, the canopy, the understory, the shrub layer, and the forest floor.

这些拥有生命的"热带雨林"按照一个真正热带雨林系统中的五层生物圈：树冠上层，树冠层，树冠下层，灌木层，地表层布置提供居住和娱乐设施。

The results showed that the diurnal changes of photosynthesis of S. chinensis in tile overstory took on "double-peak" curve with remarkable midday depression. The midday depression was mainly due to non-stomata1 limitations. On the contrary, the diurnal changes of photosynthesis of S. chinensis in the understory took on "one-peak" curve with low Pn. The maximal Pn was only half of that of S. chinensis in the overstory. The correlation analysis showed that the limiting factor for this low Pn might be light intensity (p=0.001). Compared with its accompanying plants, S. chinensis was in a disadvantaged status in the community with low photosynthetic capacity, water use efficiency, and the ratio of photosynthetic rate to respiration rate.

结果表明：夏蜡梅冠层的光合速率日进程呈"双峰"曲线，有明显的"午休"现象，经分析其"午休"的原因主要是由非气孔因素引起的；林下夏蜡梅则表现为"单峰"曲线，净光合速率较低，最大净光合速率不及冠层的1/2，相关分析结果表明其最重要的影响因子是光合有效辐射(p=0.001)；与其它伴生植物相比，夏蜡梅的日均光合速率、最大光合速率、水分利用效率和光合速率／呼吸速率都明显偏低，在群落竞争中处于不利地位。

The photosynthetic parameters of Sinocalycanthus chinensis in both overstory and understory, including the diurnal changes of net photosynthetic rate, intercellular CO2 concentration, dark respiration rate and stomatal resistance, were measured using a LCA4 Portable Photosynthesis System. The photosynthetic parameters of the accompanying plants such as Boehmeria platanifolia, Rhus chinensis and Weigela japonica var.

用LCA4型便携式全自动光合测定仪，在自然条件下，于7月下旬的晴朗天气测定了群落冠层和林下两种不同光环境下夏蜡梅的净光合速率、胞间CO2浓度、呼吸速率、气孔阻力的日进程，并与其伴生植物悬铃叶苎麻、盐肤木、水马桑Weigela japonica var。

与overstory相关的网络解释 [注：此内容来源于网络，仅供参考]

overstory：簇叶冠盖

overshot wheel 上射水轮 | overstory 簇叶冠盖 | overtemperature 超温

overstory：上層

overspread tree 過張樹 | overstory 上層 | overtopped tree 被壓木

tree of overstory：上層木

tree line 樹限 | tree of overstory 上層木 | tree of understory 下層木