Abstract
The article presents the results of studies of the biomorphological features of cannas in arid conditions. It was found that the varieties differ in the height of shoots and their number, the number of leaves and flowers on the shoots, the number of renewal buds formed by the end of the growing season. On one shoot of the Crozi cannas varieties, 2-4 renewal buds are laid, of which 1-2 shoots develop. All varieties are characterized by: the effect of the size of the 1st assimilating leaf on the total number of leaves is observed only on the first order shoots; an increase in the height of shoots with an increase in their order; a decrease in the number of leaves with an increase in the order of shoots; in the conditions of the Karshi oasis at an elevated air temperature (average ten-day values from +26.7 to + 33.4°С) in June-August - there is an increased growth and development of the aboveground part, with a decrease in temperature (to 19.5°С) from the end of September - underground.
Highlights
Karshi oasis is included in the desert zone and is considered one of the driest regions of Uzbekistan
There may be days with very severe air droughts, in which the relative humidity of the air during the day drops to 20%
17-19 leaves are formed on the canna shoot
Summary
Short, with light and unstable snow cover. The average number of days with air drought (with relative humidity below 50%) per year is 40 days. The unfavorable aspects of the summer growing season include an increased degree of dryness: the number of years with strong dry winds in July reaches 40-70%, with very strong dry winds - almost 10%. Autumn begins in September: rains begin to fall, the air temperature drops, frosts are possible from the end of October [1,2]. In such conditions, there is a constant need to expand the range of promising floral and ornamental plants for landscaping
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