Biometry of barley plants when regulating food and water regimes of soil in the AMPR program

Problem and purpose. Due to the action of abiotic and biotic (including anthropogenic) factors on previously reclaimed lands, processes of soil degradation have developed, which are used in agricultural production. To increase their fertility, it is necessary to regulate the food regime, for example, with modern technologies using ameliorants. It is possible to improve the water regime of reclaimed lands by creating optimal conditions for cultivated crops by regulating the groundwater level (GWL). At the present stage, it is already possible to use digital technologies online. The purpose of our research was to study changes in biometric indicators of plant height when regulating food and water regimes using the agronomic mechanism of digital technologies. Methodology. To achieve this purpose, vegetation and lysimetric experiments were carried out with an ameliorant at a dose of 10, 15 and 20 t/ha. In the growing season, the moisture deficit was replenished by irrigation; in the lysimetric experiment, by simulating the groundwater level at 0.5 and 0.9 m. Biometric measurements were performed online automatically using the AMPR program developed by Professor Yu.P. Dobrachev. The results were processed using statistical methods. Results. The research results showed that increasing the dose of the ameliorant to 20 t/ha did not contribute to the maximum plant growth, which, in turn, affected the barley yield. In the vegetation experiment, the height of plants in option 3 was 33.2 cm and in the lysimetric experiment it was 35.10 cm in option 9 with simulated groundwater level at 0.9 m. The barley yield changed accordingly and was graphically represented by an S-shaped curve. Conclusion. The efficiency of applying the ameliorant at a dose of 15 t/ha to spring barley plants of Kati variety has been established when simulating the groundwater level at 0.9 m. The results obtained will be summarized and presented in the form of recommendations to managers of the Novoselki agricultural holding.>