CHEMICAL COMPOSITION AND REMOVAL OF NUTRITION ELEMENTS WITH HARVEST OF SPRING RAPE IN LIMING OF SOD-PODZOLIC LIGHT LOAMY SOIL WITH SLIGHTLY ACID VARIOUS FORMS OF AMELIORANTS

Abstract

When liming of sod-podzolic weakly acid soils of various forms of lime ameliorants positively influenced the yield of spring rape seeds on chemical composition of plants and take out the main elements nutrition crop yields. The growth of the specific removal of calcium and magnesium yield practically did not affect the application of calcareous sapropel. The introduction of dolomite, which has a longer aftereffect containing calcium and magnesium, to an increase in the specific removal of calcium from 9,0 to 9,9-10,8 kg/t, magnesium - from 4,1 up to 4,5-5,2 kg/t. The highest specific removal of calcium was obtained by making chalk - 11,7 kg/ha. Liming slightly acidic soil contributed to the growth of the specific removal of phosphorus on 0,5-1,6 kg/t, but the forms themselves ameliorants had no significant effect on the removal of phosphorus, the values of which the options were 24,2-25,3 kg/t. On the background of dolomite powder increasing doses of dolomite potassium from 90 to 150 kg/ha increased the potassium content of the dry weight of rapeseed by 0,09% in the straw - on 0,41%. In this case, the specific removal of elements increases from 23,5 to 29,0 kg/t, respectively, more due to increase seed yield of potash fertilizer. Increasing doses of nitrogen from 120 to 150 kg/ha increased the percentage removal of an element with 37,6 to 38,6 kg/t (1 kg/t).