ECOLOGO-BIOLOGICAL FEATURES OF THE SPECIES OF HEMEROCALLIS L. GENUS UNDER THEIR INTRODUCTION INTO BOTANICAL GARDEN OF KRYVYI RIG NAS OF UKRAINE
Journal Title: Naukovyi visnyk Chernivetskoho universytetu. Biolohiia (Biolohichni systemy) - Year 2014, Vol 6, Issue 2
Abstract
The ecological and biological characteristics and adaptive plasticity level of 9 species and 110 varieties of the genus Hemerocallis L. were studied. It is investigated in ecological conditions of Krivyі Rіg. The beginning of vegetative season daylily falls on first decade of April when the sum of effective temperatures above the 00С reaches 125,05 – 166,07. It is established that the terms of vegetative season beginning are most dependent on the sum of temperatures above 00С, although low correlation index indicates multifaceted dependence of this phenophase beginning. It was established that the beginning of flower budding quite clearly related with the sum of temperatures above 50C. This relationship is expressed by the correlation coefficients from 0,898 to 0,980. But if the introduced species and varieties very early flowering started flower budding at the sum of temperatures 778,7 - 899,10С, then for midseason this index was twice as much - 1570,60С. In the conditions of Krivyі Rіg first started flowering plants of species H. middendorffii (the end of May - early June) and H. dumortieri (I-II decade of June), while the latest blossomed H. citrina and H. thunbergii (third decade of July). The massive flowering of daylily introduced plants there were for July. Flowering of very early daylilies began, when sum of effective temperatures above the 00C was 967,20C, while for species and varieties midseason and late midseason these indicators reached 1685,2 and 1811,30C respectively. Analysis of the relationship phase of flowering and sum of effective temperatures showed that early flowering daylilies was most dependent on spring transition temperature over 00C (correlation coefficients 0.945 + - 0.981), while the daylilies midseason and late midseason terms of flowering beginning closely related to the sum of effective temperatures above 100C, as evidenced by high (r = +0,863 - +0,907) correlation coefficients meanings. In the conditions of Krivyі Rіg plants of early-midseason species reproduced rhythms inherent of their natural areas. While plants of very early species H. dumortieri and midseason terms of flowering H. citrina and H. thunberdii began to flowering for 12-15 days earlier. Duration of daylilies flowering in our conditions fluctuated within 15-55 days. Daylilies resistance to unfavorable factors in our conditions is provided by the transition to dormant state (ending growing season for 30-40 days earlier than in a natural areas) or by change of phenorhythm type, which is typical fer evergreen specie H. aurantiaca (change of phenorhythm type on semi evergreen). The vast majority of daylily species and varieties in Krivyі Rіg ecological conditions are had a high and medium adaptation level. Daylilies inherent ecological plasticity combined with the unpretentious to growing conditions and wide range of different decorative qualities allows to use them to optimize of industrial regions.
Authors and Affiliations
Т. Ф. ЧИПИЛЯК
Keywords
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