INFLUENCE OF THE WAYS OF AGRICULTURAL USE OF PEAT SOILS ON THE TRANSFORMATION OFFRACTIONAL PHOSPHATE COMPOSITION

Abstract

The results of the researches of studying the influence of long agricultural use of peat soils on the transformation of the reserves and structure of fractional phosphate composition are shown. It is established that the reserves of gross form of phosphate in the layer 0-40 cm of soil under the grass have increased in 3,4 times and crops rotation increased in 4 times and under the tilled crops increased on 7% in comparison with the reserve. The reserves of all fractions of phosphate in different soil use have increased, too. At the same time the share participation of organic compounds is dropping in phosphate composition and accordingly the specific share of mineral compounds especially available for plants is rising; phosphate fund is becoming crumbly.