PHENOLOGICAL ASPECTS OF GROWTH AND DEVELOPMENT OF TETRAGONOLOBUS PURPUREUS (TETRAGONOLOBUS PURPUREUS MOENCH.) DEPENDING ON THE SOWING TIME
DOI:
https://doi.org/10.32782/2310-0478-2024-2-50-54Keywords:
tetragonolobus, sowing, germination, flowering, vegetation period, temperature and precipitationAbstract
Optimization of sowing dates is a key factor in increasing yields, as it requires an individual approach to managing each field, taking into account weather conditions and plant development stages. The aim of the study was to find out how different sowing dates of tetragonolobus affect the timing and speed of the main phases of plant development and how these processes depend on the genetic characteristics of plants and growing conditions in the Kyiv region. To study this task, a set of methods was used, including field research – elements of growing technology, visual observations – to describe in detail the features of plant growth and development, and statistical analysis – to quantify the impact of various factors on these processes. Depending on the variant of the experiment, tetragonolobus seedlings were observed from May 18 to June 16. The shortest sowing-emergence period (11 days) was observed when sowing in the late spring 2nd and summer terms. Under the control sowing period, the seedlings appeared on the 30th day. The beginning of flowering occurred from June 17 to July 6, and technical maturity – from June 26 to July 11, and biological maturity – from July 8 to July 25. The shortest vegetation period (39 days) was recorded for summer sowing, and the longest (51 days) for early spring sowing. The study showed that sowing dates significantly affect the duration of phenological phases. Early sowing compared to late sowing was characterized by a longer passage of interphase periods of plant development. It was found that for the full cycle of tetragonolobus development from sowing to bean maturation, it was necessary to ensure the sum of effective temperatures (over 10 °C) in the range of 561.3–580.5 °C and precipitation of 60.3–149.9 mm. The results of the study are a scientifically sound basis for developing recommendations for growing tetragonolobus in the Kyiv region, which will increase the yield and quality of products.
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