eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-12-22 13 4 2045 2053 10.13005/bbra/2363 17142 article Axaule Ondasynovna Olzhabayeva 1 Alexey Grigoryevich Rau 1 Erbol Sarkynovich Sarkynov 1 Zhanuzak Nurdildaevich Baimanov 2 Asylkhan Ashimovich Shomantaev 3 Kazakh National Agrarian University, The Republic of Kazakhstan, 050010 Almaty, Abai 8. Kazakh Research Institute of Rice named after I. Zhakhaev, The Republic of Kazakhstan, Kyzylorda, 120008, Abay Avenue, 25 b. Kyzylorda State University Korkyt Ata, The Republic of Kazakhstan, Kyzylorda, ul. Ayteke Bi, 29 A. The rice root nutrition is easy to regulate, and, therefore, it is the basis of high yields. It still remains unknown how the absorbed salt is used at different vegetation phases, so it is not always possible to explain the real causes of low yields. Most often it is associated with poor climatic conditions in the year. However, weather conditions cannot explain the lack of crop growth with an annual increase in the amount of fertilizers applied. The field experiments have been conducted to determine the standards and timing of fertilizers application for rice on degraded lands (Nauryzbai section), which provides a high rice yield and the efficiency of irrigation water use. The trial establishment on the standards and terms of mineral fertilizers application at a rate has been performed to determine the optimal fertilizer rate (N₁₂₀P₉₀K₆₀; N₁₅₀P₉₀K₆₀; N₁₈₀P₉₀K₆₀.) According to the results, the optimal fertilizer rate after melilot is N₁₅₀P₉₀K_60. https://www.biotech-asia.org/vol13no4/effect-of-irrigation-and-fertilizers-on-rice-yield-in-conditions-of-kyzylorda-irrigation-array/ irrigation regime; rice irrigation system; mineral fertilizers; salinization; land improvement activities; drainage