Properties of Meadow -Gray Soils and the Bioprapatics Effect on the Porloq-4 Cotton Harvesting

Abstract

The article presents the research results conducted on the irrigated meadow-gray soils conditions for personalized agriculture using various biopreparations in the cotton variety Porloq-4 cultivation. In this case, the changes in these soils properties during the growing season were compared and their productivity was determined. It was found that the mechanical composition of the studied soils is mainly light sandy, medium sandy in some areas, the soils are mostly weakly saline in the spring before planting and partially unsalted, and by the end of the vegetation season in the fall, mostly weakly saline, some layers of the partial soil profile were moderately saline, the salinity type being sulphate and chloride-sulphate.

During the spring, the amount of the nutrient elements   in the plowed layer of irrigated meadow gray soils are as following: humus 1.12%, total nitrogen 0.105%, phosphorus 0.162%, gross potassium 1.49-1.64%, mobile nitrogen 19.6 mg/kg, phosphorus 11,2 mg/kg and potassium 158 mg/kg.  In the variants of irrigated meadow gray soils in the study, different biopreparations were used in relation to the control variant in the mowing phase of the Porloq-4 cotton variety including, in RIZOKOM-1 mobile nitrogen 10.0 mg/kg, mobile phosphorus 1.6 mg/kg and exchangeable potassium 5.0 mg/kg, respectively in DAG -1 is NO₃-20,0 P₂O₅-5,4 K₂O-30,0; in BIODUX NO₃-7,0, P₂O₅-5,6, K₂O-6,0; in MIKRO-1 is NO₃-18,0, P₂O₅-7,9, K₂O-15,0; in MIKRO-2 is NO₃-9,0, P₂O₅-7,7, K₂O-9,0 and in HARVEST is NO₃-8,0, P₂O₅-5,4, K₂O-10,0 mg/kg, including variants in which different biopreparations were used relative to the control option during the flowering phase, in RIZOKOM-1 mobile nitrogen 10.0 mg/kg, mobile phosphorus 2.7 mg/kg and exchangeable potassium 5.0 mg/kg, in DAG-1 is NO₃-20,0, P₂O₅-8,4, K₂O-20,0 in BIODUX NO₃-8,0, P₂O₅-2,6, K₂O-10,0;in MIKRO-1 is NO₃-19,0, P₂O₅-6,9, K₂O-20,0; in MIKRO-2 is NO₃-10,0, P₂O₅-0,5, K₂O-10,0 and in harvest is NO₃-11,0, P₂O₅-1,5, K₂O-10,0 mg/kg with relatively high values. At the end of the growing season, the amounts of humus, total nitrogen, phosphorus and potassium remained stable in the variants using different biopreparations compared to the control variant, RIZOKOM-1 mobile nitrogen 2,0 mg/kg, mobile phosphorus 1,1 mg/kg and exchangeable potassium 5,0 mg/kg, мос равишда in DAG -1 NO₃-4,0, P₂O₅-2,0, K₂O-5,0; in BIODUX NO₃-3,0, P₂O₅-1,2, K₂O-0,0; in MIKRO-1 NO₃-2,0, P₂O₅-5,0, K₂O-0,0; in MIKRO-2 NO₃-4,0, P₂O₅-1,1, K₂O-0,0 and in harvest increased by NO₃-4,0, P₂O₅-1,0, K₂O-0,0mg/kg while some variants observed no change in mobile potassium the yield of Porloq-4 cotton was 43.0 ts / ha in the control variant with NPK mineral fertilizers and 2.0-9.0 s/ha in the variant with NPK + treated with various biopreparations.