CONSUMPTION OF NITROGEN PLANTS AND ITS BALANCE ON WOOD-PODZOLIC SOILS OF DIFFERENT EROIDATION IN MERGENCY WINTER WHEAT

Abstract

The main part of nitrogen is consumed by a winter wheat during the period from shoots to a kolosheniye phase. Its carrying out with elevated biomass on average and severely eroded soils is lower in comparison with not bald-headed soil on average for 20 and 30 %, respectively. In nitrogen carrying out by a harvest of the main and secondariest production nitrogen of fertilizers occupies from 22 to 28 %, soil nitrogen - from 72 to 78 %. With increase in erodibility of the soil the role of nitrogen of fertilizers increases in a delivery of plants and formation of a harvest. On the average and severely eroded soil the share it in the common carrying out makes respectively 28 and 27 %. In the common carrying out of nitrogen the winter wheat with its grain consumes from 78 to 89 %. The specific carrying out of nitrogen from 1 ton production decreases with increase in erodibility of the soil. At an importation only of phosphoric and potash fertilizers the high deficiency of nitrogen in a delivery of a winter wheat is noted - the intensity of balance is 26-32 %. Use of nitrogenous fertilizers promotes, especially on bald-headed soils, to the considerable decrease in deficiency of an element.