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首页> 外文期刊>Ekologia Bratislava >THE DEGREE OF SOIL WATER SATURATION IN THE NARROW-LEAVED ASH (Fraxinus angustifolia Vahl.) FLOODPLAIN FOREST
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THE DEGREE OF SOIL WATER SATURATION IN THE NARROW-LEAVED ASH (Fraxinus angustifolia Vahl.) FLOODPLAIN FOREST

机译：窄叶灰（Fraxinus angustifolia Vahl。）洪泛森林的土壤水分饱和度

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Research is aimed at analysing the dynamics of the soil water saturation degree (FDR method) during three characteristic developmental phases of ash stands. The studied stands are located in the lowland forest in Upper Posavina (a part of the Sava river valley) in Croatia. The experiment was established in natural stands of a community of narrow-leaved ash with autumn snowflake (Leucoio-Fraxinetum angustifoliae G 1 a v. 1959), which is distributed in the area dominated by the community of pedunculate oak and great greenweed (Genista elatae-Qucrcelwn roboris R a u 5 1969). Three locations in a micro-depression of a flooded plain were chosen: 1) the lowest micro-relief position - the bottom of a bogged site - initial development phase; 2) the central micro-relief position - optimal development phase; 3) the marginal bogged area towards a fresh micro-depression - terminal development phase. The degree of water content in the soil is regarded a very practical indicator of ash stand conditions, in which the soil in the lower part of the rhizosphere (in the initial phase it is within a depth of 1 m) is completely saturated with water over most of the year or the whole year. Anaerobiosis, or reduction conditions in the soil correspond to the soil saturation degree. In terms of the degree of soil water saturation, the terminal phase of ash forest is the most distinct, while in terms of total water quantity in the profile and its dynamics, the initial phase takes up the first place. Based on research we can concluse that developmental phases differ from one another in the dynamics of soil water saturation at almost all depths. At the beginning of a drier vegetation period there was no difference between the initial and the optimal phase in the bare regeneration area, and between the terminal and the optimal phase in the old stand. Similarity between these pairs was evident throughout the vegetation period. In the year with a more humid vegetation period, this differentiation regularity was hardly evident in terms of saturation degree dynamics. In conditions of a drier vegetation period (2000), the most favourable distribution of water in the soil occurred in the terminal phase.
机译：研究旨在分析灰分林三个特征发育阶段土壤水分饱和度的动态变化（FDR方法）。被研究的林分位于克罗地亚上波萨维纳（上萨瓦河谷的一部分）的低地森林中。该实验是在带有秋天雪花的窄叶灰分群落的自然林分中建立的（Leucoio-Fraxinetum angustifoliae G 1 a v。1959），该群落分布在有花梗的橡木和大绿藻（Genista elatae）占主导的区域-Qucrcelwn roboris R au 5 1969）。在淹没平原的微洼地中选择了三个位置：1）最低微起伏位置-沼泽地的底部-初始发育阶段; 2）中央小救济位置-最佳发展阶段; 3）边缘沼泽地带向新的微萧条-终端发展阶段发展。土壤中的水分含量被认为是灰分状态的一个非常实用的指标，在​​该条件下，根际下部的土壤（在初始阶段深度为1 m以内）被水完全饱和。一年中的大部分时间或全年。土壤中的厌氧菌或还原条件对应于土壤饱和度。就土壤水分饱和度而言，灰林的末期最为明显，而在剖面中的总水量及其动力学方面，初始阶段占据了第一位。根据研究，我们可以得出结论，发育阶段在几乎所有深度的土壤水饱和度动力学方面都互不相同。在较干燥的植被期开始时，裸露的再生区的初始阶段和最佳阶段之间以及旧林分的终端阶段和最佳阶段之间没有差异。在整个植被时期，这些对之间的相似性显而易见。在植被较为潮湿的年份，这种分化规律在饱和度动态方面几乎不明显。在干旱的植被时期（2000年），土壤中最有利的水分分布发生在末期。

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