Qishloq xo‘jaligi va agrotexnologiyalar instituti huzuridagi ilmiy daraja beruvchi phD

The subject of the study is sowing norm and bush thickness, plant growth, development, root system, yield for grain in the main crop and for silage mass when planted in the field, quality of the product.
The scientific novelty of the research is as follows:
For the first time,In the conditions of irrigated meadow-swamp soils of Samarkand region, the norms of optimal sowing of mid-ripening and early-ripening hybrids of maize in the main crop for grain were determined, taking into account the purpose of sowing, the thickness of the bush;
the effect of the studied technological methods on plant growth dynamics, root structure, leaf surface, photosynthetic potential, net photosynthetic productivity, weed contamination, root mass and economic efficiency indicators of cultivation has been determined;
growth, development, silage mass yield, nutrient unit, digestible protein output of early and mid-ripening maize hybrids sown in the stubble field were determined;
economic performance indicators of maize hybrids sown in the main and stubble were analyzed depending on sowing norms and bush thickness.
Implementation of research results. Based on the results of a scientific study on the study of the norms of sowing maize as a main and repeated crop in the conditions of meadow-swamp soils of Samarkand region:
Based on the results of the scientific research, a recommendation was developed and approved on the topic "Cultivation of high grain and silage mass from the main and repeatedly planted maize hybrids in the conditions of Samarkand region" ( reference number 02/025-3732 of the Ministry of Agriculture dated September 16, 2021). This recommendation serves as a practical guide for farms today.
The results of the research on improving the technology of cultivation of maize hybrids for the main and repeated crops in the conditions of the irrigatedmeadow-swamp soils of the Samarkand region were implemented on a total of 104 hectares of livestock farms in the Bulungur, Jomboy and Tayloq districts of the Samarkand region. (Reference No.02/025-3732 of the Ministry of Agriculture dated September 16, 2021). As a result of the introduction of this technology, the average grain yield of the Uzbekistan 601 ESV hybrid was 80.1 c/ha and the Karasuv 350 AMV hybrid was 67.8 c/ha. 47.1 c/ha of Uzbekistan 601 ESV hybrid and 39.2 c/ha of Karasuv 350 AMV hybrid were obtained when sown in stubble. Pure income from 1 hectare is up to 7,500,000 so‘ms, and profitability has increased to 66%.