The level of biochemical composition of sweet cherry fruits of different ripening periods was investigated. It has been established that the content of chemical elements in sweet cherry fruits depends on a number of factors. Fruits ripening period is listed frstaming the features of the pomological variety. Weather conditions during the formation and ripening of sweet cherry fruits have a signifcant effect on the content of chemicals. The variety Melitopolskaya krapchastaya was revealed to have a high content of dry soluble substances among all the studied varieties. In the group of late-ripening varieties, the smallest difference in the amount of acidifed acids in fruits between varieties is observed. The high content of organic acids was recorded for the Donetsk Ember variety, and the lowest one for the Turquoise variety. On average, for the varieties of different ripening periods, the highest content of organic acids was noted for early ripening varieties, and the lowest one for late ripening varieties. Having considered all the studied varieties as a whole, it can be asserted that the content of titratable acids was the highest in the fruits of the mid-ripening variety Alenushka, in relation to all other varieties; the lowest amount of organic acids was recorded for the late-ripening varieties Amazonka. The sugar content in the fruits of late-ripening sweet cherry varieties exceeded the average values of the groups of early-ripening and mid-ripening varieties. The mid-ripening variety Mirage was characterized by a high content of vitamin C, and the lowest value of this component of the chemical composition was obtained for the early-ripening variety Mlievskaya yellow. Taste qualities and biochemical composition of fruit and berry crops largely depend on the characteristics of the variety and climatic conditions of cultivation.The early ripening varieties Dar Mliyeva and Zoryana received the maximum tasting assessment. In the group of mid-ripening varieties, the Melitopolskaya krapchastaya variety was highly appreciated, and among the late-ripening varieties, the Turyuza variety. Key words: cherry varieties, dry soluble substances, sugars, organic acids, vitamin C, sugar-acid coefcient.
One of the main requirements of the new stone fruit varieties recommended for commercial cultivation is a compact crown shape that allows for greater plant density and easier crown maintenance. The aim of the research was to establish the growth processes of the above-ground parts of cherry trees in varieties of different ripening periods. The article presents the results of studies of the features of apical and lateral growth of sweet cherry trees. Biological and varietal features of tree growth strength, growth and total length of annual shoots are determined. The dependence of tree trunk growth on apical growth force is established. According to the results of research, sweet cherry varieties are grouped according to the strength of growth: the vigorous varieties are Amazonka, Dar Mliyeva, Zoryana, Mliyivska zhovta; the semi dwarf are Aboryhenka, Alyonushka, Drohana zhovta, Mirazh; the dwarfing are Biryuza, Donetskyy uholyok, Melitopolska krapchasta, Meotida. The smallest increase in trunk diameter was found for the dwarfing variety Biryuza, and the largest – for the variety Drohana zhovta. The highest yield load per unit cross-sectional area of the trunk was recorded for the variety Donetskyy uholyok, the lowest – for Drohana zhovta. The amount of growth in the trunk diameter was inversely dependent on a load of trees with the crop and the strength of apical growth of sweet cherry trees. The features of shoot-forming ability allow characterising the shape of the crown of cherry trees: round – Donetskyy uholyok, Amazonka; high-round – varieties of Aborigenka, Dar Mliyeva, Zoryana; wide-pyramidal – Alyonushka, Drohana zhovta, Melitopolska krap-chasta; pyramidal – Mliyivska zhovta, Mirazh; low – Meotida, Biryuza. Dar Mliyeva, Zoryana, Mirazh, Melitopolska krapchasta and Drohana zhovta varieties have high shootability; the Mliyivska zhovta, Aboryhenka, Meotida, Amazonka varieties have medium shootability; Alyonushka, Biryuza, Donetskyy uholyok varieties have low shootability
The article presents the research results on the efficiency of switchgrass seeds sorting by a set of characteristics – specifc gravity and aerodynamic properties in order to reduce the biological state of seeds dormancy and germination increase signifcantly. It is experimentally proved that sequential seeds sorting in two stages by a set of features – specifc weight on the pneumatic table and aerodynamic properties on the aspiration column provided a signifcant increase in its germination energy, germination and 1000 seeds weight. Sorting of Morozko variety seeds on the pneumatic table ensured obtaining seeds with germination energy and similarity in positions 1 and 2, respectively – 16–19 % and 20–22 %, while in positions 3–5 these indicators were, respectively – 5–13 % and 9–17 %. Re-sorting of these seeds by aerodynamic properties provided an increase in germination energy and seed similarity from the position of the pneumatic table "3", respectively – by 12 and 13 %, the intermediate fraction – by 14–16 %, and waste – by 19–21 % compared to these indicators to sorting, due to the selection of the lung and with lower seed similarity. Sorting seeds by a set of characteristics provided not only an increase in its quality, but also an increase in the yield of more similar seeds. The most effective way to prepare switchgrass seeds for sowing is to sort them by a set of features – specifc weight and aerodynamic properties, which reduces the biological dormancy of seeds, signifcantly increases its germination energy, similarity, 1000 seeds weight and quality seeds. But this measure does not provide a complete solution to reduce the biological state of dormancy of seeds. Key words: seeds yield, aerodynamic properties, specifc gravity, germination energy, similarity, 1000 seeds weight.
Purpose. To indentify the best shallot cultivars and local forms by growing period length, bulb yield, leaf productivity, and bulb weight and number per clump in the Right-Bank Forest-Steppe of Ukraine. Methods. Statistical processing, field assessments, computational and analytical methods. Results. Collection shallot accessions were evaluated for growing period lengthand, bulb weight, number and performance. Earlyripening accession ‘Sh-8’ with a vegetation period of 74 days was selected. Local form ‘Sh-1’ from the Kyivska Oblast region turned out to be the best in terms of the mean bulb weight per clump (26.7 g). Accessions from Kyivska (‘Sh-1’, ‘Sh-2’), Dnipropetrovska (‘Sh-6’, ‘Sh-9’), and Chernihivska (‘Sh-10’) Oblasts yielded the most (30.5, 25.4, 18.9, 18.1, and 19.4 t/ha, respectively). The check cultivar, ‘Lira’, yielded 15.5 t/ha. The smallest yields were harvested from the following accessions: ‘Sh-4’ (12.2 t/ha), ‘Sh-7’ (12.0 t/ha), ‘Sh-11’ (11.9 t/ha), ‘Sh-12’ (13.8 t/ha ha), ‘Sh-13 (13.2 t/ha), and ‘Sh-14’ (13.0 t/ha). Two accessions, which came from the Kyivska (‘Sh-3)’ and Dnipropetrovska (‘Sh-6’) Oblasts were found to be best adapted to the environmental conditions of the Right-Bank Forest-Steppe of Ukraine. Their Lewis’s phenotypic stability factors were close to 1. A local form from the Dnipropetrovska Oblast, ‘Sh 9’ was the worst adapted accessions, as its Lewis’s phenotypic stability factor was as high as 1.2. The maximum leaf length was recorded for accessions from the Kyivska (‘Sh-1’, ‘Sh-2’; 38.0 and 35.8 cm, respectively) and Chernihivska (‘Sh-10’; 36.2 cm) Oblasts. Conclusions. Due to this study, shallot accessions with short growing periods, great weights and numbers of bulbs and yield were selected for the conditions in the Right-Bank Forest-Steppe of Ukraine. ‘Sh-1’ sample originating from the Kyivska Oblast showed the best results in terms of the bulb weight (26.7 g) and yield (30.5 t/ha). However, it turned out to be late-ripening (86 days), and only formed on average 4 bulbs per clump. The maximum leaf length was 38 cm was. ‘Sh-8’, a local form from the Dnipropetrovska Oblast, was the most early-ripening (74 days).
The article presents the results of a study of the assimilation surface of sweet cherry trees of different pomological cultivars. The aim of the research was to study the morphological and varietal characteristics of the deciduous cover of sweet cherry trees, depending on the timing of fruit ripening. As a result of observations and analysis, the morphological features of the leaf apparatus of trees, leaf area and total leaf surface were determined as one of the main indicators of the photosynthetic potential of fruit trees. It was established that a characteristic feature of the varieties Turquoise, Drogana yellow and Donetsk coal was an increase in the area of the leaf blade with the age of the trees. Sweet cherry cultivars of late ripening were characterized by a smaller area of the leaf blade compared to cultivars of early and medium maturity. The size of the leaf blade did not depend on the strength of the growth of the fruit tree. A vigorous cultivar Mliyevska yellow and medium-sized Mirage had the maximum area of the leaf blade. The smallest size was found in the undersized variety Turquoise and medium-sized Alionushka.The area of the leaf blade significantly depended on the pomological cultivar of sweet cherry trees, scab damage and freezing of the trees. It was established that with age, the volume of fruit tree crowns of the cultivars of different ripening terms slightly increased. This was most clearly expressed for the Amazon cultivar, where the increase in crown volume was 11.96 m 3 , and the smallest increase was for the Donetsk coal cultivar -1.0 m 3 . A high degree of land area development was inherent in trees with more spreading crowns. The varieties Amazonka, Dar Mliyeva and Aborihenka have mastered the feeding area allocated by the planting scheme more effectively. The activity of the passage of photosynthesis processes and the productivity of plantations at the age of 6-8 years were negatively affected by the low area of deciduous cover of sweet cherry plantations -14-35% of the optimal one.
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