THE EFFECT OF DIFFERENT IRRIGATION REGIMES ON RICE PRODUCTIVITY IN THE KYZYLORDA REGION
Keywords:Рисовая оросительная система, засоление почв, минерализация воды, рисовая карта, эколого-мелиоративные условия, солевой режим почвы, режим орошения, оросительная норма, коэффициент фильтрации
On the basis of production, field and laboratory studies, indicators of the formation of the ecological-reclamation state of rice irrigation systems were studied and established. Optimal depths of flooding rice checks have been established, providing favorable salt and thermal regimes, under which the best conditions are created for the growth and development of rice plants. An improved irrigation regime for rice has been developed. Against the background of shortened rice flooding, it was recommended to reduce the discharge of water for discharges and flow through by replacing them with filtration into the soil. A mathematical model of the optimal rice irrigation regime has been developed. The influence of the design of the surface of rice checks on the irrigation rate and yield has been studied. A rice irrigation technology has been developed that ensures the rational use of water resources, favorable ecological and and-reclamation conditions of irrigated land, and high rice yield. Theoretical and practical value of the work. Recommended optimal irrigation mode of rice for rice irrigation systems of Kyzylorda region, providing effective weed control, preservation of soil fertility, reduction of irrigation water consumption
by 15-20% in conditions of a strong shortage of water resources in the lower reaches of the Syr Darya. The research results will be used in research and design and survey institutions, agricultural organizations in the preparation of projects for the
reconstruction of irrigation systems. The introduction of an optimal regime of rice irrigation in the farms of the Kyzylorda region will provide increased yields, improved soil amelioration, and rational use of water resources. Field studies were carried out in rice crop rotation of the experimental site “Karauyltobe” of the Kazakh Research Institute of Rice named after Ibrai Zhakhayev. A shortened method of flooding was used, the “Marzhan” rice variety.