Abstract
The increasing frequency of dry periods in many regions of the world and the problems associated with salinity in irrigated areas frequently result in the consecutive occurrence of salinity and drought which lead desertification of cultivated land. In the department of soil microbiology Institute of microbiology AS RUz have developed a new environmentally safe bioagrotechnology for cultivation cotton on saline soils which based on the joint applying the 2 biopreparation Rizokom-1 and Serhosil. Revealed that the applying of a biopreparation Rizokom-1 as bacterization of cotton seeds, contributed to normalization of the salt content of saline soils: cations (Ca2+; Mg2+; Na+; K+) and anions (Cl- HCO3- SO42-) composition, reduced the content of the sum of salts: all salts 0.297%, toxic (NaCl + Na2SO4 + MgSO4) - to 0.228% and nontoxic (Ca(HCO3)2 + CaSO4) - 0.073% in the average during the vegetation in comparison with control. In the experimental variants revealed the active development of the root system by reducing the toxic salts in the soil and normalized the balance of nutrients. A well-developed root system facilitates the active absorption of nutrients from the soil. The using of a biopreparation Serhosil as foliar application on phases of 3-4 leaves, bud and flowering-fruiting of vegetation cotton, increased photosynthetic activity of the plant's leaves, which improved the nutrition of plant through the leaves. All this combined effect on the yield and quality of cotton fiber. Yield increased by 0.4-0.7 t/ha, and improved quality of cotton’s fiber.
