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首页> 外文期刊>South-East European Forestry >The Impact of Drought, Normal Watering and Substrate Saturation on the Morphological and Physiological Condition of Container Seedlings of Narrow-Leaved Ash (Fraxinus angustifolia Vahl)
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The Impact of Drought, Normal Watering and Substrate Saturation on the Morphological and Physiological Condition of Container Seedlings of Narrow-Leaved Ash (Fraxinus angustifolia Vahl)

机译：干旱，正常浇水和底物饱和度对窄叶灰（Fraxinus angustifolia Vahl）容器幼苗形态和生理状况的影响

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Background and Purpose: Narrow-leaved ash (Fraxinus angustifolia Vahl) is one of the most important tree species of lowland floodplain forests in the Republic of Croatia. Recent significant climate changes, reflected in extreme temperatures and long dry periods, have had a direct impact on the dynamics and levels of groundwater, as well as on the dynamics of precipitation and floodwater, which are of decisive importance for the success of narrow-leaved ash. Our study aims to determine the morphological and physiological characteristics of seedlings of narrow-leaved ash after 72 days of drought, normal watering and substrate saturation. Materials and Methods: The experiment was established in three treatments (drought, normal watering and saturation), and each treatment included two containers or 24 seedlings. A total of 72 seedlings were replanted. After 72 days, height growth and increment, water potential, photosynthetic efficiency and the total chlorophyll content in the leaf mesophyll were measured. Results: Seedlings from the drought treatment wilted immediately. Seedlings saturated with water up to the root collar manifested better height and diameter growth, high water potential and a lesser physiological stress response as compared to the seedlings that were watered normally. Conclusions: Seedlings of narrow-leaved ash, which is a hygrophytic tree species, do not tolerate dry conditions and no watering. Seedlings saturated with water for 72 days showed a better morphological-physiological status than the seedlings that received normal quantities of water.
机译：背景与目的：窄叶灰（Fraxinus angustifolia Vahl）是克罗地亚共和国低地洪泛区森林最重要的树种之一。反映在极端温度和长期干旱期间的近期重大气候变化直接影响了地下水的动态和水位，以及降水和洪水的动态，这对于窄叶的成功至关重要。灰。我们的研究旨在确定经过72天的干旱，正常浇水和基质饱和后的窄叶灰树苗的形态和生理特征。材料和方法：实验建立了三种处理方法（干旱，正常浇水和饱和处理），每种处理方法包括两个容器或24个幼苗。总计重新栽种了72株幼苗。 72天后，测量了叶片的叶身高度，高度和增高，水势，光合作用效率和总叶绿素含量。结果：干旱处理的幼苗立即枯萎。与正常浇水的幼苗相比，饱水直至根颈的幼苗表现出更好的高度和直径生长，较高的水势和较小的生理胁迫响应。结论：窄叶灰树苗为吸湿性树种，不能耐受干燥条件，也不能浇水。饱水72天的幼苗比接受正常水量的幼苗表现出更好的形态生理状态。

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