查询词典 transpiration current

With aggravation of drought stress, ZXY04P-75 and ZXY04P-201 increased in proline content while that of ZXY03P-173 and ZXY04P-239 increased initially, reaching the peak at the 8th day, then declined. And the rate of net photosynthetic declined notably with the intensity of drought stress, The minimum of decline rate of net photosynthetic is ZXY04P-201. 4. The results of photosynthetic mechanism for 4 Dactylis glomerata L. show: the net photosynthetic rate, transpiration rate,stomatal conductance and chlorophyll decreased dramatically, Compared with weak drought resistance ZXY04P-239,the net photosynthetic rate, transpiration rate, stomatal conductance and chlorophyll in the leaves strong drought-resistance ZXY04P-201 decreased slowly.

连续水分胁迫及复水条件下4份鸭茅抗旱机理的研究表明，叶片水分饱和亏缺随着干旱胁迫强度的增加而增加，其中变化幅度最大的是ZXY04P-239，最小的是ZXY04P-201；ZXY03P-173和ZXY04-201质膜相对透性和可溶性糖含量随着干旱胁迫强度的增加而增加，而ZXY04P-75和ZXY04P-239出现单峰变化，在胁迫第8d后达到最大，然后下降；ZXY03P-173和ZXY04P-239脯氨酸含量在干旱胁迫第8d达到最大，而ZXY04P-75和ZXY04P-201的脯氨酸含量随着干旱胁迫程度的加深而逐渐达到最大；4份材料叶片的净光合速率随着干旱胁迫强度的增加而减小，其中ZXY04P-201的净光合速率下降率胁迫至12d时为最小。

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。

On the basis of analysis of the transpiration rate and environment factor, we can know that transpiration rate and the stomata conductance and the intensity of illumination are significant correlation.

通过蒸腾速率与环境因子的相关性分析，可以得出：太阳辐射和气孔导度是树木蒸腾耗水的重要影响因子。

It has been shown that transpiration through the stomata amounts to 90% of the transpiration that occurs from a water surface of the same area as a the leaf.

据显示在叶片气孔处发生的蒸腾作用约占同叶片面积相等的水面能够发生的蒸腾作用的90%。

The comparative research results showed that:(1)Thediurnal variation of the net photosynthetic rates in the aquatic leaves was a "double-peak", with an various "midday-decline", the time of the peak value appeared at about 10:00 A.M. and 13:00 P.M., while that in the xeric leaves was showed with invarious peak value and "midday-decline"; The diurnalvariation of transpiration ratesof both aquatic and xeric leaves appeared as a single-peak, the appearance time of peak value of the latter was earlier than the former and gradually decreased in the afternoon; The stomatal conductances appearance time of both of them were close to that of photosynthesisrate ,reached to the maximum in the morning and then gradually decreased: Diurnal variation of intercellular CO2 concentrationshows that: both aquatic and xeric leaves increased at first, and then exhibit a tendency of ascending within narrow range.(2) The net photosynthetic rates, photosyntheticallyactive radiation, stomatal conductances and transpiration ratesof both two kinds of leaves showed positive correlation, The correlation degree among them was prominent, there was significant negative correlation between The net photosynthetic rates and intercellular CO2 concentration.

研究结果表明：(1)水生叶片净光合速率的日变化曲线呈双峰型，出现明显的&午休&现象，峰值出现在10：00左右和13：00左右，但旱生叶片表现出的峰型和&午休&现象不明显；两种叶片的蒸腾速率日变化曲线表现为明显的单峰型，旱生叶峰值出现时间早于水生叶，中午过后逐渐下降；两种叶片气孔导度峰值出现时间和光合速率相近，均表现为上午升高至最高，随后逐渐下降的趋势；两种叶片胞间二氧化碳浓度日变化表现为：整体上先下降，然后有一上升趋势：(2)两种叶片的光合速率与光合有效辐射、气孔导度、蒸腾速率呈正相关，全部达到显著水平；光合速率与胞间CO2浓度显著负相关。

According to the correlation analysis, the photosynthesizes rate had the highly significant correlation with transpiration rate and stomata conductivity and had significant correlation with intercellular CO2 concentration. The transpiration rate had highly significant correlation with stomata conductivity and photosynthesizes rate.

相关分析发现，光合速率与气孔导度、蒸腾速率呈极显著相关，与胞间CO2 浓度呈一定的相关性；蒸腾速率与气孔导度、光合速率呈极显著相关。

The results showed: 1 Alfalfas grown for different lengths of time had considerable influence on photosynthetic characteristics of which the most important was stomatal conductance followed by transpiration rate and the chlorophyll relative content. 2 Diurnal variation in Pn and Tr had two peaks, and an obvious midday depression. 3 The net photosynthetic rate was significantly positively correlated with photosynthetic radiation, stomatal conductance, the relative chlorophyll content, and transpiration rate. The net photosynthetic rate was significantly negatively correlated with intercellular CO2 concentration.

结果表明，1生长年限对苜蓿光合特性有较大的影响，对气孔导度的影响最大，其次是蒸腾速率和叶绿素相对含量。2苜蓿叶片净光合速率、蒸腾速率日变化均呈现&双峰&曲线，有明显的光合&午休&现象。3净光合速率与光合有效辐射、气孔导度、叶绿素相对含量呈极显著正相关，与蒸腾速率呈显著正相关，与田间CO2浓度呈极显著负相关。

N Anti-transpiration chemicals appear promising for film-forming and water-retention around the foliages, decrease transpiration and evaporation effect.

n 在叶片外形成一层透气保水膜，阻止树体和叶片的水分散失，可有效减少树体的蒸腾和蒸发作用。

The thermal transpiration of three capacitance diaphragm gauges was experimentally studied for gases of N2, He and Ar in the pressure range of 10^(-2)Pa to 102 Pa. The correction equation for each gas species was derived by fitting the pressures measured with a CDG in the pressure range in which strong thermal transpiration can be observed.

利用N2、He、Ar三种气体对三只电容薄膜规在10^(-2)Pa~10^2Pa的热流逸效应进行了研究，对实验数据进行拟合，得到每种气体在热流逸效应产生区间CDG示值压强的拟合公式，并用实验验证了公式的准确性。

Whether there is salt stress or not, the transpiration velocity of warm winter wheat cultivars NR9405 and Xiaoyan6 are smaller than that cold winter wheat cultivars of Shaan229 and RB6. These results indicate the lower canopy temperature of cold-type winter wheat is caused by the higher transpiration.

无论盐胁迫与否，NR9405和小偃6号的蒸腾耗水量和蒸腾速率均小于陕229和RB6；蒸腾耗水量大，带走的热量多，是冷型小麦冠层温度低于暖型小麦的主要原因。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。