Cotton water consumption on irrigated lands in Karakalpakstan.

Mambetnazarov, A. B., Features of water consumption of cotton on irrigated lands of Karakalpakstan.

Nukus branch of the Tashkent State Agrarian University, Nikus, Uzbekistan.

Bulgarian Journal, Agriculture Science Vol. 22, No 2: 250–252, 2016.

The total water consumption of cotton on irrigated soils in automorphic series at the conditions arid and semiarid lands of Karakalpakstan Republic is 6790 m3/ha. The share of irrigation in total water consumption norms cotton field is 58.9%. The annual precipitation is 80–100 mm, and the total evaporation is 10–12 times greater than precipitation.

In the article is considered total water consumption cotton plant depending on soil-meliorations’ of the zone, mechanical composition of ground in layer of the aerations and constructions, adding soil of water, level soil of water and their mineralization.

The Republic of Karakalpakstan is located north of the area of world cotton production. In relation to climate of the region refer to the desert zone. Annual precipitation is 80–100 mm, and the total evaporation is 10–12 times greater than precipitation. Therefore, under these conditions, agriculture is based solely on artificial irrigation. It is therefore necessary to determine the components of the water balance equation soils under cotton.

The results of research conducted on the 2009–2014 in farm “Kuat” Chimbay region suggests that the total water consumption of cotton fields depends on the depth of groundwater. Lowering of the groundwater causes the flow of irrigation water increases. The main incoming part of the water balance in soils automorphic series (GWL < 3 m) of irrigation water, less importance rainfall and soil moisture created is not growing season. The total water consumption of cotton on irrigated soils in automorphic series is 6790 m3/ha. The share of irrigation in total water consumption norms cotton field is 58.9%, soil moisture is 34.4%, and 6.6% of precipitation. Transpiration expended 65.5%, evaporation from the soil surface of 40.3%. http://www.agrojournal.org/22/02-13.html

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