The effect of foliar fertilizing on the chemical composition of leaves of ferragnes almond cultivar grown in valandovo

The effect of foliar fertilizing on the chemical composition of leaves from ferragnes almond cultivar grown in Valandovo region in the period from 2012 to 2013 was determined. The experiment was set in four variants and three repetitions. The variants were: Control (untreated); NPK+Ever green со Me (55% organic matter, 2% w/w Mg, 2% w/w Fe, 2% w/w Zn, 2% w/w Mn, 0.5 % w/w Cu, 0.5% w/w B); NPK+Biolinfa (34% organic matter 3% N, 5.80% K2O) and NPK+Oligomix (1.20% B, 0.10% Cu, 4% Fe, 1.50% Mn, 0.10% Mo, 2% Zn). The distance of fruit planting was 4.5 m row by row and 3.5 m in the rows. In each variant and repetition were included 60 plants, and total in all experiment were included 720. Three foliar treatments were applied with given above fertilizers at a concentration of 0.4%. In the end of the November, soil fertilization with the fertilizer Polyfeed NPK 11-44-11 in quantity amount of 450 kg ha-1 was done. Before setting up the experiment, soil agrochemical analyses were made, and was concluded good fertility with nitrogen, but medium fertility with phosphorus and potassium. The foliar fertilizing has a positive influence on the chemical content of almond leaves. The highest average content of nitrogen (3.66%), phosphorus (1.22%) and potassium (1.15%) were determined in the leaves from variant 3 NPK+Biolinfa (34% organic matter, 3% N, 5.80% K2O). The highest average content of calcium (0.93%) and magnesium (0.42%) was determined in the leaves from variant 2 NPK+Ever green with Me (55% organic matter, 2%w/w Mg, 2%w/w Fe, 2%w/w Zn, 2% w/w Mn, 0.5 %w/w Cu, 0.5 %w/w B). The highest average content of micro elements iron (245 mg kg-1), manganese (170 mg kg-1), boron (38.10 mg kg-1), zinc (17.00 mg kg-1), and copper (25.00 mg kg-1) is determined in leaves from variant 4 NPK+Oligomix (1.20 % B, 0.10 % Cu, 4 % Fe, 1.50 % Mn, 0.10 % Mo, 2 % Zn).