The effect of different fertilizing systems on productivity and nutritional uptake from maize hybrid Mikado, grown on medaw soil Plovdiv region was studied. The studded fertilizing systems were: 1. unfertilized; 2. N10P7,5K5; 3. N20P7,5K5; 4. N30P7,5K5; 5. 6 t/da manure + NP; 6. N20P0K5; 7. N20P7,5K0. The different fertilizing systems led to different yield increasing from 21,7 to 35,2 % in comparison with unfertilized variant. The nitrogen fertilization had crucial effect on the yield. The exclusion of phosphorus from mineral fertilizing system decreased maize productivity with 7,4 % in comparison with analogy system but phosphorus ensured. The exclusion of potassium had no effect on maize productivity. The fertilized plants were taken up from 18.5 to 27.3 kg N/da, from 5.4 to 12.4 kg P2O5/da, from 18,8 to 28,8 kg K2O/da. The maize hybrid Mikado up take from 2,0 to 2,7 kg N, from 0,6 to 1,2 kg P2O5 from 2,0 to 2,9 kg K2O for formation of 100 kg main production.
Effect of different fertilizing systems on productivity and N, P & K taken up from maize hybrid mikado