Study of the effect of limiting production factors - hybrid, nutrient-supply level and irrigation - on the yield and starch-content of maize (Zea mays L.).

In sense of optimization of site-specific nutrient-supply we studied the effect and interactions between hybrid, nutrient-supply and irrigation on the yield, starch-content and starch-yield within the confines of a long-term field experiment at Debrecen-Latokep. We found that the yield and the starch-content was optimal on a nutrient-level 120 : 92 : 108 kg ha(-1) N : P2O5 : K2O, further inputs don't result in significant increment. The yield was affected by all three production factors, while starch-content depended on irrigation and nutrient-supply. As a consequence starch-yield was also affected by all three studied factors. We concluded that it's reasonable to choose inputs in accordance to the production site and the purpose.