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631.45:631.95(478) (2) |
Știința solului. Pedologie. Cercetări pedologice (714) |
SM ISO690:2012 LEAH, Nicolai, ANDRIEŞ, Serafim, GOJINEȚCHI, Ana. Dry matter accumulation and nutrient consumption by winter wheat depending on the harvest level. In: Eastern European Chernozems – 140 years after V. Dokuchaev, : International Scientific Conference, 2-3 octombrie 2019, Chişinău. Chişinău: Centrul Editorial-Poligrafic al USM, 2019, pp. 156-161. ISBN 978-9975-149-37-2. |
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Eastern European Chernozems – 140 years after V. Dokuchaev, 2019 | ||||||
Conferința "Eastern European Chernozems – 140 years after V. Dokuchaev, " Chişinău, Moldova, 2-3 octombrie 2019 | ||||||
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CZU: 631.45:631.95(478) | ||||||
Pag. 156-161 | ||||||
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The features of dry matter accumulation and nutrient consumption of winter wheat during various periods of vegetation are revealed.In the phase of spring tillering, winter wheat accumulates about 6–9% of dry matter and about 20% of nitrogen and phosphorus and 32% of potassium from their maximum quantity. By the booting phase, wheat accumulates about 20% of dry matter and uses about 75% potassium, 50% phosphorus and 40% nitrogen from the total need from the soil. The greatest amount of dry matter - about 80% of the total - winter wheat accumulates during the period from the booting phase to milk-wax maturity of grain. By the flowering phase, plants consume the maximum (100%) amount of potassium, 67% nitrogen and 73% phosphorus (from total). A close relationship has been established between productivity and the amount of organic mass accumulated in winter wheat in various phases of development. Fertilizer contributed to a more intensive (1.4-3.8 times more) use of nutrients from the soil. The most intense nitrogen consumption of winter wheat per unit time falls on the period from booting to milk-wax maturity of grain. During this period, wheat uses 1.7-2.6 kg/ha of nitrogen daily for the formation of 4.5-5.5 t/ha of grain. The optimization of the nitrogen nutrition of winter wheat during this period determines the level of yield and its quality. |
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Cuvinte-cheie chernozems, dry matter, harvest, Nutrient consumption, winter wheat |
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