EFFECTS OF FERTILIZATION ON YIELD AND GRAIN QUALITY IN WINTER TRITICALE

Abstract

Study of fertilization effects were conducted in a stationary type of field trial, on a degrading vertisol soil with low pH. Eight variants of mineral nutrition (NK, NP1, NP2, NP3, NP1K, NP2K and NP3K) and untreated control (without nutrition) were tested in the experiment. The rates of nitrogen application were 80 kg N ha -1 , and they were applied either individually or in combination with three phosphorus rates and the potassium fertilizer. The highest grain yields under mineral nutrition involving a combination of three mineral elements were: N, P and K (80 kg N ha -1 , 60 kg P2O5 ha -1 , 60 kg K2O ha -1 ), and under NP2K treatment at a rate of 80 kg N ha -1 , 80 kg P2O5 ha -1 and 60 kg K2O ha -1 . Based on the analysis of variance, it can be concluded that there were highly significant differences in grains yield among years of investigation and highly significant differences at 1000-grain weight and grain test weight.