In Hungary, maize has the largest field after the winter wheat. Its 26-27% of all cultivated areas. In the World, the yield of maize were 1071 million tonnes in 2016 (FAO). It is estimated that this figure will grow by 12 million annually. Its main field of use is animal feed, which is about 90% of the yield in our country. The world's population is growing steadily, and this is predicting that the use of food is becoming increasingly important. We reveal the plant physiology and technological contexts in our examinations, that the bases of the modern nutrient solutions, and the scientific bases of the efficient development of the maize growing system The experiment was set up at Szarvas in the experimental field of the University of Szent István, Faculty of Agricultural and Economics Studies, in Galambos. During the research, we examined the effect of various nutrients (N, P, K) ratios on maize monoculture in long-term experiments. The contexts between the factors 64 nutrients we measured it on a supply level, 4 nitrogens portion (0 kg ha-1, 70 kg ha-1, 140 kg ha-1 and 210 kg ha-1), 4 phosphoruses portion (0 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 120 kg ha-1) and 4 potassiums portion (0 kg ha-1, 60 kg ha-1, 120 kg ha-1 and 180 kg ha-1) On the parcels all possible combinations get to a setting, which makes the examinations of the interaction of the nutriment elements. The setting of the experiment onto the bases of the old fertiliser experiment of Faculty on a similar manner, on similar principles, modernized to the scientific and practical claims of our days. We examined the nutrient reaction of maize on the chlorophyll content, the establishment of the leaf area and the average yield. The increase of the leaf area yielded a tight positive correlation with the increase of the average yield and the leaf relative chlorophyll content. From among the nutriment elements we measured the most considerable positive effect in the case of the nitrogen in our experiment. The effects of the phosphorus and the potassium were smaller.

relative chlorophyll content, leaf area, yield, nutrient supply, maize

field crops and pastures

Presentation: poster