Analysis of Setaria glauca (L.) P. Beauv. Population’s Vital Parameters in Grain Agrophytocenoses
Keywords:population, vitality, production process, absolute growth rate, reproductive effort, index of renewal, index of generative
The paper presents the results of research on key vital parameters of a one-year late spring segetal species Setaria glauca (L.) P. Beauv. in crops of grain and legumes in the conditions of the north-rast forest-steppe Ukraine. It has been observed that in S. glauca there is a statistically significant change in the complex population characteristics, in particular, indicators of development of the vegetative sphere and reproductive organs against the background of changes in the field conditions. It turns out that the values of the main morphometric parameters and their dynamics in weed plants statistically significantly change by gradient of different crops, which are dominant agrocenoses and significantly affect the development of segetal wild species. It is proved that each cultivated plant is an edificator of agrocenosis and has a significant phytocoenotic effect on the state of S. glauca populations. The study found that favorable conditions for the development of weed emerged in fields of peas and winter wheat, while the crops of winter rye and buckwheat significantly inhibited the development of S. glauca populations. Knowledge of the dynamics of vital parameters of S. glauca populations under various field conditions allows the effective application of the system of anti-weed crop rotation, which allows controlling the clogging of fields using environmentally safe methods without application of herbicides.
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