Published in Scientific Papers. Series A. Agronomy, Vol. LXIV, Issue 1
Written by Angelina MUHOVA, Stefka STEFANOVA-DOBREVA
The aim of the study was to determine the influence of mineral fertilization in the conditions of soil type Pelic Vertisols in durum wheat, variety Progress, grown under non-irrigated conditions. The experiment was set in 1966 in two-field crop system rotation of durum wheat-cotton. The data include 2014/2019. The following fertilization rates were tested: N40, N80, N120, N160; P40, P80, P120, P160; N80P40, N80P80, N80P120, N80P160, N120P80, N120P120, N160P80, N160P120, N160P160, N120P120K80. As a control variant was accepted N0P0K0. The results of the study showed, that grain yield has the greatest effect on average for the tested period at fertilization with N80P40. The plant height, the number of grains per spike and the weight of the grains per spike showed the highest values under the influence of N160P120. The length spike is affected equally by fertilization with N160 and N160P120. The analysis reveals positive and proven correlations were found between all yield components. The strongest relationship was observed between length spike and number of grain per spike (0.973***).
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