Acta Botanica Croatica, Vol. 42 No. 1, 1983.
Izvorni znanstveni članak
Phytocoenological and ecological investigations of oat grass meadows in Podravina (Northern Croatia)
Ljudevit Ilijanić
; Hrvatska
Nedeljka Šegulja
; Hrvatska
Sažetak
The paper presents results of continued phytocoenological and ecological investigations of oat grass meadows in Podravina (Fig. 1). A new association is described, namely Ononido-Arrhenatheretum elatioris (H-ic) ass. nov. (alliance Arrhenatherion elatioris), which differs from the Central European oat grass meadows particularly by the characteristic species Ononis arvensis L. (= Ononis hircina Jacq.) and by differential species Trifolium patens, Moenchia mantica and Cirsium canum (Table 1). The centre of distribution of the association lies in the vegetational zone of the alliance Carpinion betuli illyricum, which supports the phytogeo- graphical justification for the separation of the new association.
In Podravina the association is found at the northern border of the area, and can be broken down into an eastern and a western variant (Table 2). This classification, based on differences in the floristic composition also reflects ecological and climatic differences between the eastern and the western parts of Podravina (Fig. 2).
From ecological standpoint, there is a significant regularity in respect of the reaction (pH) of the surface layer of the soil (0—10cm). Average pH-values decrease (i.e. the soil is more acid) in the East-West direction (Table 3), which shows that in the western parts of Podravina, owing to higher humidity, the processes of soil eluviation are stronger. This is clearly reflected in the composition of oat grass meadows, especially in the occurence of acidophylous species in some stands of the western variant of the oat grass meadows in Podravina.
Ključne riječi
Hrčak ID:
158803
URI
Datum izdavanja:
31.12.1983.
Posjeta: 1.056 *