Abstract

The article discusses the composition and suitability of wastewater from poultry farms, their suitability for irrigation purposes of cotton variety C-6524 in the meadow soils of Tashkent region, the impact of wastewater use on the growth and productivity of cotton. Wastewater is characterized by a slightly alkaline reaction, dissolved and undissolved organic and mineral substances in them is 530–730 mg/l., total nitrogen 60.8–86.3 mg/l., total phosphorus - 1.2–2.2 mg/l., gross potassium - 16.7–22.4 mg/l. In terms of nitrogen content, wastewater is characterized by a high fertilizing value. For example, in the composition of river water, the content of total nitrogen makes 4.2–7.5 mg / l., and in the composition of wastewater this indicator varies within 60.8–86.3 mg / l., i.e. with each 1000 m3 of wastewater the field receives 60.8–86.3 kg of nitrogen, about 1.3–2.2 kg. phosphorus and 16.7–22.4 kg kli. The coli-titer of sewage is 10-6 and the total number of microbes in them is 64.6x106 pcs / ml. The suitability of wastewater for irrigation was determined by generally accepted methods, the results of which showed that wastewater from poultry farms is quite suitable for irrigation without any additional reclamation measures.