THE CURRENT SITUATION WITH PHOSPHORUS SUPPLY OF ODESSA REGION SOILS

Abstract

The role of phosphorus in the plants life is restricted by its significance for human plants and animals life. Phosphorus is the component of 20-25 the mostly important chemical element are being consumed by plants.

Phosphorus promotes roots formation, takes part in respiratory processes; complicated carbohydrates biosynthesis, and other processes of plants growth and development; moderates the influence of summer drought and winter low temperatures; increases plants resistance to diseases.
The lack of phosphorus delays plant growth and development, and overage causes the leaves necrosis, too early fruits ripening, and total crop average decrease.
According to the research results, the non- significant difference between phosphorus containing during the IX- th and X- th research tours, and comparatively to the very beginning of agrochemical observation, the phosphorus level remains in the mean interval.

The mean oblast index stayed the same with a little decrease deviation by 4 mg/kg of soil.
The mobile phosphorus substances content amplitude is equal from 51 mg/kg during the first tour (1996-1970 yy) up to 98 mg/kg during the fifth (1986-1990 yy.) and is sixth (1991-1995 yy.) tours.
The level of phosphorus contain in soils, and respective phosphorus fertilizers bringing, not only during seedtime, during basic and pre-seedtime soil treatment, will contribute yield increase for all the agricultural crops.