Grain yield and yielding components of different types of corn cultivars (Zea mays L.) depending on method of nitrogen fertilizer application

摘要

The paper presents the results of field tests intended to assess the yields of corn ( Zea mays L.) with different genetic profiles, depending on the method of nitrogen fertilizer application. According to results of our study the corn grain moisture at harvest time was affected by variation in air temperature as well as amount of rainfall. It was demonstrated that start fertilization affected the grain yield beneficially, as compared to spread fertilization, both when employed exclusively and in combination with partial top dressing. The "stay-green" ES Paroli variety provided greater grain yield in comparison to the traditional variety (ES Palazzo) in all trial years and regardless of the year or fertilizing method. The number of produced cobs per unit of area, and the weight of 1000 grains were markedly higher for the stay-green hybrid. Variety had an opposite effect on the number of grains per cob.