Effects of some agronomic practices on the quality of starch content of maize grains
University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Land Use, Engineering and Precision Farming Technology, 138 Böszörmenyi str., HU4032 Debrecen, Hungary
The use of maize, both as main and by-product, is extremely versatile and diverse. The highest amount of carbohydrate within maize is found in the form of starch (C6H10O5)x. In terms of industrial starch, maize is the most important raw material. Fodder maize is primarily an energy source due to its high starch content, and its protein and oil content are less important. It was found that starch and protein content, which are negatively correlated with each other, are significantly affected by fertilizer doses. The experiment is located in the Hajdúság Loess Plateau, its soil is loess-based deep humus layered calcareous chernozem. The following treatments were applied in the scope of the polyfactorial experiment: Tillage: T1 = winter ploughing, T2 = strip tillage, T3 = ripping. Crop years: 2017, 2018 and 2019. Fertilization treatments: N 0 kg ha-1 P2O5 0 kg ha-1 K2O 0 kg ha-1 (control); N 80kg ha-1 P2O5 60 kg ha-1 K2O 90 kg ha-1 and N 160 kg ha-1 P2O5 60 kg ha-1 K2O 90 kg ha-1. Analysis of the nutritional component was carried out by means of a Foss Infratec TM 1241 Grain Analyser.
In terms of fertilization treatments, the highest (64.42%) maize starch content was measured for the control treatment, while the lowest starch content was recorded in the case of the 160 kg N ha-1 treatment (62.62%). The analysis of the crop year effect showed that 2018 was the most favourable year for the maize starch content of the examined samples (65.76%). Of the studied years, the lowest starch content was measured in 2017 (61.78%).