Uman NUH | today: 05/19/2019

Fotosintetik activity of sowing of hybrids of corn of different groups of ripeness in the conditions of irrigation

Author(s) Vozhegova R. A., doctor of agricultural sciences, , Institute of Irrigated Agriculture of NAAS
Vlashyk A. M., Candidate of Agricultural Sciences, , Institute of Irrigated Agriculture of NAAS
Shapar L. V., Candidate of Agricultural Sciences, , Institute of Irrigated Agriculture of NAAS
Дробіт О. С., , , Institute of Irrigated Agriculture of NAAS
Category The Agronomy
year 2018 issue Випуск №93. Частина 1
pages 70-80 index UDK 633.15:631.5 (477.72)
DOI 10.31395/2415-8240-2018-93-1-70-80 (Link)
Abstract To obtain high yields of the maize hybrids under investigation, it is necessary to form the optimal area of the leaf surface to provide an adequate amount of dry matter, which is the most important condition for obtaining stable corn grain yields of high quality. For growth and development, the plant organism requires extreme temperature, light and other conditions. Important growth manifestations of plants are their growth processes associated with quantitative changes. When growing corn plants, it is necessary to take into account their adaptive properties, i.e. sensitivity to growing conditions. The intensity of the growth processes of maize plants, as is known, depends on the group of ripeness of hybrids and varieties. These processes are also affected by weather conditions during the growing season and elements of agrotechnology. Therefore, the purpose of our studies was to study the influence of the timing of planting and the density of standing on the photosynthetic activity of crops of maize hybrids of various ripeness groups under conditions of irrigation of the Southern Steppe of Ukraine. It was established that the highest indices of pure photosynthesis productivity in all phases of development and the timing of crop hybrids sowing – 5.38–14.18 g/m2 per day were with the use of 70 thousand plant/ha densities. The maximum value of the indicator of the photosynthetic potential was fixed at sowing in the third decade of April, 12–13 flowering leaves in the interphase period – 1189–1686 thousand m2/ha. The ripeness group of the hybrid influenced the formation of the photosynthetic potential. The highest values of the indicator were established during all the sowing periods of the mid-season of the Kahovski Hoghbroide, which were in the period of 12–13 leaves–flowering of the rockers in the range of 1375–1686 thousand m2/ha.
Key words corn, hybrids, the timing of sowing, the density of standing, the net productivity of photosynthesis, photosynthetic potential.
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