气孔

Black-ink-filled, the size of the havocin blowhole and changed the inspectable.

充墨时，破坏了气孔的大小，改变了气孔尺寸。

The results showed that the photosynthesis of Melinis minutiflora varied in a double-peak pattern with a remarkable noon inhibition and being controlled by stoma. The first peak appeared around 10:00 am while the Pn reached 18.8 molCO2/(m^2s) and the second peak appeared around 14:00 pm while the Pn reached 14.4 molCO2/(m^2s), and changed positively with the variation of transpiration rate and stomatal conductance.

结果表明，糖蜜草的光合日变化呈双峰型，有明显的&午休&现象且受气孔调节。10：00出现第1个峰值，Pn为18.8μmol/，14：00左右出现第2个峰值，Pn为14.4μmol/，变化趋势与蒸腾速率、气孔导度等因子相同。

In this study, based on the Rnl, extinction coefficient k, transition coefficient of canopy layer stomatic resistance K', aerodynamics resistance ra and rc calculated with the data of Rn, LAI, rsi, the daily transpiration variation of Picea purpurea, Larix principisrupprechtii, Hippophae rhamnoides ,Betula platyphylla and Populus cathayana were studied in Datong County, Qinghai Province. Comparing with the practical transpiration variation measured by Li1600 Steady Porometer, the relative error of this model was less than ±15%, and the results were stabilized and tested by precision analysis.

本研究通过对Rn、LAI、rsi的实地观测，确定了林冠截流净辐射、消光系数、冠层阻力转换系数、空气动力学阻力和冠层整体气孔阻力，对青海大通地区紫果云杉、华北落叶松、沙棘、白桦和青杨的日蒸腾过程进行了模拟，与用快速称重法订正的Li1600稳态气孔仪实测蒸腾结果对比，模拟的相对误差在±15%以内；模型敏感性分析发现，温度、LAI以及rsi是决定模拟结果的主要参数，模型对各参数变化反应不敏感。

The porosity and pore size distribution of HVFA pastes and concretes were determined by autoscan porosimeter. The results show that excessive fly ash content and comparatively high water-cementitious materials ratio will cause a big increase in porosity and harmful pore in HVFA pastes.

首次把X射线小角散射技术用于测定高掺量粉煤灰水泥浆体气孔—固体界面的分形维数，并就粉煤灰掺量、水胶比对气孔—固体界面分形维数的影响进行了分析，发现过高的粉煤灰掺量和较大的水胶比均会使分形维数大幅度增加。

This paper also analyses the effect of water deficit on water use, yield, fruit quality, crop coefficient, water use efficiency and economical benefit, and achieved the followings:⑴The research of the water deficit treatment and rewater domino effect significantly test that proper water deficit can regulate and control stomal open degree efficiently, reduce the overtranspiration of leaves, stimulate the compensating effects.

更多水效应研究，进一步证实了适度水分亏缺可以有效调控梨枣树叶片气孔开度，降低叶片过多的蒸腾耗水，并刺激树体诱发补偿效应，初步揭示了调亏灌溉提高果树叶片水平水分利用效率的机理与水分亏缺引起的&干湿交替过程&对气孔的调控机理，从果树生理角度进一步证实了调亏灌溉的节水机理。

As well as between stomata density and stomata area.

气孔密度与气孔面积之间也表现出负相关。

Most plants exhibit a stomatal rhythm whereby the stomata open in light and close in darkness.

大多数植物显示出一种节奏性变化，在有光照时气孔张开，黑暗中气孔关闭。

In order to simulate evapotranspiration rate continuously, a proper stomatal model is needed.

要连续地模拟冠层的蒸散量，必须有一个合适的气孔模型，而目前的气孔模型还不能令人满意。

On the whole, the model can be used as a theoretical framework for the analysis of the characteristics of stomatal behaviours.

由此指出叶片表面的风速是影响气孔导度的重要环境因子之一，一个完整的气孔经验模型必须包括它的影响。

It shows that the environmental factors such as water and altitude et al., effects stomatal density more, and stomatal index less.

这表明气孔密度易受水份和高度等环境因素的影响；而这些因素对气孔指数的影响则相对要小。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。