Productivity of alfalfa of various slopes for seeds, depending on bio - and biotic factors
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Дата
2022
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Анотація
The scientific paper presents the results of studies of the influence of
mowing on the development and formation of alfalfa seed yield when growing it on
chernozems of the southern steppe of Ukraine on non-irrigated lands. Studies aimed at
identifying factors that can contribute to increasing alfalfa seed productivity and
improving soil fertility, reducing the pesticide load on them, are relevant. The aim of
the work was to determine the influence of abiotic and biotic environmental factors
(weather conditions and mowing on seeds, relationships between weeds and cultivated
plants, population of agrophytocenoses with pests) on alfalfa seed productivity. It is
determined that at the first mowing in the agrophytocenosis there are, on average, 12.5
specimens./ m2 of weeds that during the growing season of alfalfa seeds of the third
year of life remove 40.8 kg/ha of nitrogen, 3.5 – phosphorus, 41.3 – potassium and 9.9
kg/ha of nitrogen from the soil. calcium, and with an intermediate slope, the density
of weeds is much less (9 PCs./m2), which absorb almost 3 times less nutrients from the
soil. It was found that the cultivation of alfalfa with intermediate mowing (mowing the
first for green fodder at the beginning of budding) contributes to an increase in seed
yield by 20.9% compared to the first, the level of profitability increases from 182.9 to
313.7%, or by 130.8 percentage points (71.5 percent. So, growing alfalfa for seeds
with intermediate mowing is environmentally safer, due to a decrease in the number of
pests in the agrophytocenosis, and therefore the need for insecticides, compared to the
first mowing, which is proposed for introduction into production.
Опис
Kushnir R. Productivity of alfalfa of various slopes for seeds, depending on bio - and biotic factors / R. Kushnir, Z. Andersons ; advisor L. Antypova // Black Sea Science 2022 : proc. of the Intern. Competition of Student Scientific Works / Odesa National University of Technology ; eds. B. Yegorov, M. Mardar [et al.]. – Odessa : ONUT, 2022. – P. 675–688 : tabl. – Ref.: 27 tit.
Ключові слова
alfalfa for seeds, weather conditions, slopes, plant growth and development, pests, weeds, battery removal, technology efficiency