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Regionally rare species of Allium L. in Western Podillya

Journal: Scientific Herald of Chernivtsi University. Biology (Biological Systems) (Vol.8, No. 2)

Publication Date:

Authors : ; ;

Page : 280-287

Keywords : family Allium L.; population; age structure; spatial structure; seed productivity;

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A study of populations rare species of Allium L. (A. flavescens Besser, A. senescens L. subsp. montanum (Fr.) Holub, A. podolicum (Asch. &Graebn.) Blocki ex Racib. ~ A. paniculatumsl, A. sphaerocephalon L.,) in Western Podolya. The study was conducted using classic techniques. By analyzing the spatial structure of populations A. flavescens, A.senescens subsp. montanum and A. podolicum we selected linear tape or population. A. sphaerocephalon typical for isolated local type spatial location. During the study found that the population of A. flavescens West Podolya tolerant tail, is the average density (14,3-16,1 persons. / m2), age range feature advantage vegetative individuals. The study of the age structure of populations A. podolicum conducted at five sites. Age spectra of the first three and the fifth populations have peaks at virhinilnyh generative and individuals. Fourth populations in their age range is significantly different from previous ones and has two peaks in juvenile and generative age conditions. Therefore, belongs to the advanced or invasive populations. The population of A. senescens subsp. montanum tolerant, is the average density. Population studies A. sphaerocephalon conducted at three sites. The second population of individuals preheneratyvnyh number higher than the first and third populations. The main reason is microrelief conditions governing termorezhym. Also in the second population were found grazing and erosion. A. podolicum potential for seed productivity depending on growth conditions is 240-460 pcs., The actual 137-345 pcs., In A. senescens subsp. montanum - 144-201sht. Seeds higher productivity in areas with high insolation. The difference in performance respectively correlated climate indicators in rainfall and days with high temperatures (25-32 ° C). Performance measures higher average, although the view is well propagated vegetatively. In A. sphaerocephalon lays 542-648 pieces. seed germs, and formed valuable seeds 249-408 pcs. Analyzing the seminal performance A. flavescens we found that plants that grow on the western slopes of more heated, form more seed. But performance in the medium range 45,0-51,9 pcs,. and lower than in other species. This is because the species reproduces vegetatively better. Thus, most of the rare species genus Allium L. in Western Podolya grow in favorable conditions of their populations satisfactory. We consider it necessary to specify that A. senescens subsp. montanum be included in the list of regionally rare species of Khmelnitsky region., and A. sphaerocephalon - the list of regionally rare species Ternopil region., as the number of identified populations in these areas does not exceed 10 and stored mainly in areas bequests Park "Podolski Tovtry" and NPP " Dnistovskyy Canyon".

Last modified: 2017-06-30 22:05:28