PROVOCATION STUDY OF A LONG-TERM FIELD EXPERIMENT IN WINTER WHEAT USING ZN FOLIAR FERTILIZERS APPLIED AT DIFFERENT TIMES PUBLISHEDKatalin IRMES, István KRISTÓ, Marianna VÁLYI-NAGY, Attila RÁCZ, Melinda TAR Hungarian University of Agriculture and Life Sciences Plant Production Scientific Institute Alsó kikötő sor 9., 6726, Szeged, Hungary email@example.com
Due to extreme climatic conditions, we must increase our attention to prevent yield loss and the quality of deterioration caused by abiotic stress effects. Nowadays, the drought stress that weighs on our area requires unusual changes both in breeding and agrotechnical aspects. Therefore, to achieve a reasonable nutrient replenishment, provision of macroelements (nitrogen, phosphorus, potassium) for the cultivated plants is not enough, but we have to complement the microelements, depending on the environmental conditions. The different microelements, such as zinc, copper and molybdenum, in Hungarian soils are available in different amounts and conditions, and their availability depends on many external factors such as phenological phase, soil condition, temperature, etc. Therefore, in our studies, we apply zinc foliar fertilizer in three different doses during different phenological phases of winter wheat (BBCH22 and BBCH40). By the using of zink, we aim to reduce the abiotic stress effects of the plants during the vegetation, with which we also expect an indirect effect on the yield and quality parameters (gluten and protein content) of the treated plants. The experiments were conducted in cereal monoculture based long term field trial at four different NPK nutrition levels at Szeged Research Station of Hungarian University of Agriculture and Life Sciences on chernozem soil in 2020. In addition to the control plots we perform the same three zinc foliar treatments on all four nutrient levels: 1.) 1 l/ha at tillering, 2.) 2 l/ha at tillering and 3.) 1 l/ha at tillering + 1 l/ha at BBCH40. In 2020, although foliar fertilizer treatments did not show a significant effect on the yield, an interaction between zinc and nutrient levels was discovered. Nor can we detect a significant difference between the different foliar fertilizer treatments and the control plots in terms of content parameters either. Although we did not obtain positive results for the zinc treatments, we can see a correlation between changes in the proportion of macronutrients and the efficiency of zinc for all parameters studied.
Winter wheat, Foliar application, Zn, Long term field experiment
field crops and pastures