THE INFLUENCE OF FERTILIZATION, SOIL AND CLIMATE ON THE YIELD OF GRAIN MAIZE CROPS PUBLISHEDDan GORNIC, Florin SALA
Our studies and research aimed at assessing the influence of the fertilization system and of soil and climate conditions on the yield of grain maize crops. The experimenting conditions are specific for Banat Plain, and the soil on which the tests were run, slightly gleyzed cambic chernosem, is located within Timi ș oara Didactic Station. We tested the influence of a conventional fertilization system based on complex fertilizers and ammonium nitrate, as well as the influence of a leaf fertilization system. We observed the differentiated way in which the grain maize crop used the nutrients made available by the two fertilization systems. The indicators evaluated were quantitative (yield) and qualitative (protein content, fats content and starch content). Multivariate statistical analysis highlighted that the variants were placed into three groups in relation with the quantitative indicator, as a result of differentiated use of available resources. In the case of mineral fertilization of soil, with different doses of nitrogen on different PK combinations, the correlation between variables is very significantly positive, r = 0.924; r 2 = 0.854; p < 5%. Protein is also in significant correlation with the fertilization level, r = 0.886, r 2 = 0.785, p < 5%, while the contents of fats and starch are negatively correlated, with a low degree of significance.
fertilization system, mineral and foliar fertilizers, maize, yield, quality