盐池地区三种典型树种蒸腾速率的研究

The transpiration rates of three typical trees in Yanchi district

以宁夏回族自治区盐池地区三种典型树种为研究对象,采用快速离体称重法对新疆杨、樟子松和花棒的蒸腾速率进行了比较研究。结果表明:新疆杨蒸腾速率较大;花棒蒸腾速率较小,各树种不同部位和方位的蒸腾速率差别较大,月蒸腾速率均呈现抛物线变化趋势。在环境因子的综合作用下,樟子松蒸腾速率与太阳总辐射和光合有效辐射相关性较高;新疆杨和花棒蒸腾速率受太阳总辐射和土壤性质的影响较大,植株生长量越小对气象因子敏感度越高。

The transpiration rates of typical trees （Populus bolleana, Pinus sylvestris var. mongolica and Hedysar- um scoparium） in Yanchi county were studied by using the method of rapid weighting. Results showed that the transpiration rate of Populus bolleana was the largest. The transpiration rate of Hedysarum scoparium was the least, transpiration rates were varied between different positions and directions and the monthly transpiration rates of other trees showed a parabo and transpiration rate of Pinus photosynthetic active radiation. affected by solar radiation and lic trend. The transpiration rate was seriously affected by environmental factors, sylvestris var. mongolica showed the positive correlations with solar radiation and Transpiration rate of Populuz bolleana and Hedysarum scoparium were strongly soil factors. Less growth tree was more sensitive to environmental factors.