| Popis: |
The current study aimed at decreasing fertilizers applications on potato (Solanum tuberosum L.) cultivar Spunta. Plants were subjected to six treatments as follows: unfertilized control (T0), fertilization program (166-N+ 80-P2O5+ 80-k2O + 30M3 cattle manure ha-1) of Ministry (MAP) of Agriculture (T1), 100% MAP + 20kg humic acid (HA) ha-1 (T2), 100% MAP + 15 kg HA ha-1 (T3), 50% MAP + 20 kg HA ha-1 (T4), 50% MAP+15 kg HA ha-1 (T5). Vegetative growth increased after the different fertilization applications than control where T1, T4 and T3 had the longest plants; T1, T2 and T4 emerged the significant highest number of main stems; T1 and T4 produced the significant highest leaf area and T4 in both seasons and T3 and T2 in the first season had the significant heaviest plant fresh weight. Yield components in general significantly increased where T2 and T3 produced the significant highest tubers number plant-1; T3 yielded the significant highest tubers weight plant-1; T4, T1 and T2 significantly had the highest number of tubers >60 mm diameter plant-1. Tuber physical properties were also significantly and positively affected as compared to control where T3 and T4 resulted in the significant longest tubers. T5, T3 and T1 had the significant widest tubers and T3 and T4 produced the significant heaviest tubers. It could be recommended under similar conditions to add 83-N+40-P2O5+ 40-k2O + 15M3 cattle manure ha-1 + 20kg humic acid ha-1. |
