Форма агрегатів дерново-літогенних ґрунтів на сіро-зелених глинах
Journal Title: Питання біоіндикації та екології - Year 2016, Vol 21, Issue 1
Abstract
The forms of soil peds have been investigated in the article together with the law of their allocation on a profile of soil which is a recultivation process. Sampling is made on sod-litogenic soil on grey-green clays on a recultivation field of the Nikopol mangan-mining basin. Soil peds were photographed by means of the digital chamber bridged to the stereomicroscope. By means of cluster analysis tools structural elements have been divided into seven basic bunches (clusters) on such parametres of the form as the ped area, integrity, the maximum Feret diameter, the minimum Feret diameter in long perimetre, circilarity, similarity to a circle. Mutualities of parametres of the dimension and the form of units are established. Allocation of values of the area of projections of peds is described by the normal law. The interrelation of indicators of the area of peds, circularity of both Feret multidimensions also specify the maximum and minimum diameter forms in absence of accurately expressed correlation between these parametres. Correlation between maximum and minimum indexes of Feret is accurately expressed and positive. Also high and positive correlation is observed between the area of a projection of the ped and its perimetre. The cloud of values of this communication has deviation in the form that testifies the presence smaller in number, but sufficiently considerable part of values of this sign which are distinct from the basic set. Allocation of values of perimetre and circularity peds has link sided asymmetry. The circularity parametre has positive correlation with an indicator of similarity to a circle, but with the maximum Feret diameter the correlation of this parametre is the negative. By construction of a template of factorial frame and location of clusters of peds in discriminant space conformity the phyla of the form of peds in layers of sod-litogenic bedrocks on grey-green clays is established. It is revealed that the extended and least continuous form is inherent in peds of the top layer of earth. Small and circular peds are peculiar for the soil layer around 10–20 sm from a surface. For layers of earth from 20–30 sm, 70–100 sm in depth are specific structural separateness of the different dimension with a prevalence of the peds which form is approaching to a circle. The transitional form from a circle to elipsoid is characteristic to soil peds which are 30–40 and 60– 70 sm below a surface. The cluster of peds having the greatest dimension and the greatest variation circularity is isolated from other in discriminant space. Their form is rather solid, but is characterized by elongation. The majority of such peds is in a layer of earth around 40– 50 sm from a surface. Исследована форма почвенных агрегатов и закономерности их распределения по профилю дерново-литогенной почвы на серо-зеленых глинах участка рекультивации Никопольского марганцево-рудного бассейна. Установлено, что агрегатам верхнего слоя почвы присуща удлиненная и наименее сплошная форма. Почвенному слою 10–20 см от поверхности свойственны маленькие и кругообразные агрегаты. Для слоев почвы 20–30 см, 70–100 см в глубину характерны структурные отдельности разного размера с превалированием агрегатов, форма которых наиболее приближена к кругу. Переходная форма от круга к эллипсоиду характерна агрегатам слоев почвы, которые находятся на 30–40 и 60–70 см ниже поверхности. Обособленным от других в дискриминантном пространстве является кластер агрегатов, расположеных в слое почвы 40–50 см от поверхности и имеющих наибольший размер и наибольшую вариацию циркулярности.
Authors and Affiliations
Г. О. Задорожна G. O. Zadoroghna
Keywords
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