This study was aimed at evaluating the dry matter (DM) and nitrogen (N) accumulation in aerial part of barley plants and the shoot survival rate in function of time of N supply. An experiment was carried out in Eldorado do Sul, RS, in 2000, where six times of N supply (seedling emergence; 3rd leaf; 5th leaf; 7th leaf; 9th leaf emergence and boot stage) and two N rates (40 and 80kg ha-1) were tested. The DM and N accumulation among the shoot elongation begin and the bloom stage and the shoot survival rate were determined. The N supply among seedling emergence and 9th leaf emergence stage resulted the largest DM rates accumulations. However, the largest N rates accumulations were observed in shoot elongation period. The largest shoot survival rates were also observed in this period, showing the relation among the N necessity to support the shoot elongation process and the shoot mortality.
Hordeum vulgare L.; nitrogen management; growth stages
