抄録
Weather and climatic conditions of the Republic of Karakalpakstan are distinguished by unfavorable conditions in winter-spring period, soil salinity within the area, leading to reduction of wheat yield. The aim of the research was to develop and implement agro-technical activities to overcome the impact of unfavorable factors during winter wheat cultivation. There is evidence in the literature that diverse winter wheat cultivars have different resistance to stressful conditions and are able to tolerate drought and soil salinity. Various winter wheat cultivars with high productivity, good grain quality and ability to withstand adverse growing conditions were investigated. Field experiments were conducted in “Seyit" dehkan- farm” in Nukus district on the area of 3.5 ha, where leguminous crops were planted at 0.5 ha, and winter wheat was placed at the area of 2.0 ha. Soil type is meadow alluvial, medium-loamy in mechanical composition; humus content in soils varies from 0.7 to 0.9 mg/100 g. Generally accepted field and laboratory investigation techniques were used in the experiments. It was observed high correlation between the leaves area and crop yield - r = 0.88, and within the supply of solid and crop yield it formed r = 0.96. The highest productiveness formed the cultivar Krasnodarskaya 99 - 38.6 c/ha, which is above the standard rate for 6.7 c/ha. It represents the conformation to the high temperature, aridness and soil conditions of the region.
