Plant diagnostics to optimize mineral nutrition in crop rotation with sugar beets and grains

The article presents the results of a long-term field experiment. The experiment was conducted on two rotations in a five-course rotation. The experiment was performed in quintuplicate. Sugar beet yield was closely correlated with the content of total nitrogen and phosphorus in leaves and roots during in periods. However, the positive correlation with the content of potassium accumulated in the leaves was detected only in the first two weeks of growth, and in the roots - during the whole vegetation period. The content of nitrogen in the leaves of sugar beets (harvest fluctuation of 10-50 t/ha) was 3.0-4.7% during the formation of 2-3 pairs of real leaves, 2.8-4.4% during closing of crops, 2.33.8% during closing of row spacing. The content of phosphorus decreased more evident, the content of total potassium negatively correlated with the yield during closing of crop and row spacing. The other crops in the rotation showed a positive correlation of nitrogen and phosphorus with the yield during all periods. The lowest correlation coefficient was detected between potassium and cereals, in particular, winter wheat. Due to the data obtained over many years of the research, it is possible to calculate the content of total nitrogen, phosphorus and potassium at different yield levels. Using the results obtained, it is necessary to calculate doses of mineral nutrition.

растительная диагностика, валовый азот, валовый фосфор, валовый калий, листья, корнеплоды, уборка, коэффициент корреляции, плановый урожай, plant diagnostics, total nitrogen, total phosphorus, total potassium, leaves, roots, harvesting, correlation coefficient, conventional yield

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