The average salinity of Jizzakh region in the vicinity of groundwater (1.5 m) under the influence of a newly built closed bed ditch, winter wheat is irrigated 3 times during the season, the current irrigation rate is 823-933 m3 / ha. The norm of seasonal irrigation was 2586 m3 / ha, and the grain yield of winter wheat was obtained depending on the experimental areas, ie the area of the new construction (experimental variant) and the old type of irrigated area (control). At the same time, the average grain yield in the experimental field was 43.2 t / ha, and in the control field - 40.1 t / ha.
To cultivate field crops and increasing their salinity resistance under saline soil condition has become the prior issue. It is important to study the technology of care for each field crop based on the specific soil and climatic conditions. It is very essential to study the advanced technologies to increase the salinity of corn in these soils. In the condition of less saline soils, the green mass of the produced corn was 669.9 c/ha and dry mass constituted 169.6 c/ha while was in average saline soil this indicates were 312.7 c/ha and 95.00 c/ha relatively. Under strong saline soil condition initially 3-4 pieces of corn sprouted per sq. m. and subsequently died of salt exposure.
KEYWORDS: corn, less saline, medium saline, salt resistance, sowing time, dense of seedling, green mass, irrigation dynamics.
In the effective use of saline soils, it is advisable to plant sunflower, corn, beetroot and other crops resistant to soil salinity. At the same time, it is necessary to plant domestic and imported crops such as millet, amaranth, and African sorghum as secondary crops in these soils. These crops, even in saline soils, can contribute to the development of livestock in Uzbekistan by producing 400-500 q/ha, and even higher yields. Most importantly thousands of hectares of land that have fallen out of agricultural use will be re-introduced into the farming system. This is one of the current issues of today. In solving this problem, the resistance to salinity, yield and product quality of agricultural crops (alfalfa, sunflower, white sorghum, sorghum, beet) grown on weak, moderate and strongly saline soils are studied and scientifically substantiated. Technologies for growing these crops will be developed depending on soil and climatic conditions and salinity levels.
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