Effects of quantity of nitrogen on maize yield

Abstract

Maize is one of the leading farm cultures in the world. The primary aim of maize production is to gain high and steady incomes. Varying of the incomes of the grown plants is seen in a great measure both as a consequence of weather conditions and applied quantities of nitrogen fertilizer. In this work, in a two-year period, it is examined how the increasing quantities of nitrogen fertilizer influence the parameters of productivity, that is, morphological features and components of the incomes of Serbian maize hybrid. The examinations were conducted on the locality of Eastern Srem (88 m.s.l.). The examinations covered the following systems of maize fertilization: control (without fertilizer), P90 K60 N30 kg ha-1 (basic, phon), P90 K60 N60 kg ha-1, P90 K60 N120 kg ha-1, P90 K60 N180 kg ha-1. Within the morphological features of maize, it is examined the influence of the nitrogen fertilizer on the growth of a plant and the number of leaves on a corncob, and within the components of the income, its influence on the length of a cob, the number of grain rows and the number of grains on a cob. The results of our research have shown that, on the average for the examined factors, the height of a plant was 276.1 cm. On the average for the years, along with the increasing quantities of nitrogen up to 120 kg ha-1, the height of a plant increased, and then it declined.