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Abstract


Agro Ecological Framework For The Optimization Of Methods Of Application Of Mineral Fertilizers Depending On Varietal Characteristics Of Therice

The optimum doses of nitrogen-phosphate fertilizer (N160-180P120 kg/ha) in relation to the varietal characteristics of the rice. The average height macrophylla (Marzhan, Aral 202, Togiscen 1) and low-growing broadleaf (Lyman) varieties the highest grain yield obtained on high-yielding crops when making 60-70% annual rate of nitrogen fertilizer before planting and 30-40% in the form of dressing in the phase of 6-7 leaves (in the early phase of the 3rd stage of organogenesis) at sowing 7.5 million germinating seeds. The average height with narrow vertical leaves (Kuban 3, Krasnodar 424, Aru, Dubovsky 129) the maximum grain yield is formed on high-yielding crops when making 25-33% annual rate of nitrogen fertilizer before planting and 67-75% in the form of dressing in phases 6-7 and 8-9 leaves when planting 7.5 million germinating seeds. Increasing doses of nitrogen-phosphorus fertilizers to N240P180 kg/ha does not contribute to the increase in grain yield. The introduction of high doses of mineral fertilizers is not profitable in the economic and environmental dimension, adversely affect natural plant communities located near rice rotations, contaminate soil and water bodies.



Keywords
rice varieties,



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