Influence of sowing time and rates on the productivity of spring barley varieties under the conditions of South-East of Kazakhstan

Uzundzhalieva K. Myrzabaeva G. Masheva V. Idrisova A. Mahamedova B. Zhapparova A.
2025 Agricultural Academy, Bulgaria

Bulgarian Journal of Agricultural Science
2025 #31 Issue 6 1166 - 1170 pp.

The study presents the results of growing barley of the Zhuldyz variety under the conditions of the Almaty region at seeding rates of 4, 5, 6, and 7 million viable seeds per hectare. Early sowing extends the barley vegetation period and reduces the dependence of grain yield on atmospheric moisture. At the optimal sowing time (the second ten days of May) in the fields of LLC “AGRO-FIRM OTES-A” located in the Balkhash district of the Almaty region, grain yield is primarily determined by moisture reserves in the meter-deep soil layer and the temperature and moisture conditions during the first half of the growing season. Hydrothermal conditions during the growing season have a greater impact on grain yield than sowing dates and seeding rates. Under low-humidity conditions, barley should be sown as early as possible, and the seeding rate for a fallow predecessor should be reduced by 30–35% of the standard. Lowering the seeding rate minimizes competition between plants, allowing for the full development of the varietal potential of two-row barley. Due to the increased productive tillering of the Zhuldyz barley variety, an average over four years shows the formation of a dense, productive stem, ensuring a grain yield of 4,7 t/ha with early sowing and 5,0 t/ha with the optimal sowing time for the region. Our study indicates that modern barley varieties, when grown under favorable agricultural conditions, should be sown at a reduced rate.

seeding rate , sowing dates , vegetation period , yield fluctuations

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Agricultural Academy, Institute of Plant Genetic Resources – Sadovo, Sadovo, 4122, Bulgaria
Kazakh National Agrarian Research University, Almaty, Kazakhstan

Agricultural Academy
Kazakh National Agrarian Research University

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