ОПРЕДЕЛУВАЊЕ НА БИОКЛИМАТСКИ КОЕФИЦИЕНТ КАЈ ДОМАТ ПРИ ПРИМЕНА НА РАЗЛИЧНИ ТЕХНИКИ НА НАВОДНУВАЊЕ И ЃУБРЕЊЕ DETERMINATION OF BIOCLIMATIC COEFFICIENT OF TOMATO CROP UNDER DIFERENT IRRIGATION AND FERTILIZITANION TECHNIQUES

Abstract

The experimental trial was conducted with tomato hybrid Optima at open field near by the Faculty of Agricultural Sciences and Food in Skopje, during the period of May to September in 2003 and 2004. The main aim of this investigation was to determinate bioclimatic coefficient of tomato crop in Skopje region under different irrigation and fertilization techniques. Five different treatments of irrigation and fertilization regime of tomato crop were aim of our investigation. The first three treatments were irrigated by drip irrigation and drip fertigation, the treatment four was irrigated with drip irrigation and conventional application of fertilizers and the last one the treatment five was under furrow irrigation and conventional application of fertilizers. From the average results in two years of investigation, it can be concluded that the lowest average bioclimatic coefficient shows treatments В1 and В2 (drip fertigation every 2 and 4 days) or 1,66 and 1,67. As a result of longer irrigation frequencies (drip fertigation every 6 days), bioclimatic coefficient in treatment В3 was 1,71 or 2,4 to 3% higher in comparison with В2 and В1. Тhe control treatment with drip irrigation and conventional application of fertilizers (Ø1) showed same results as treatment В2, which is result of irrigation regime. The effect of irrigation techniques on bioclimatic coefficient is presented by the comparison of the results from the control treatments Ø1 and Ø2 (furrow irrigation and conventional application of fertilizers). Namely, control treatment Ø2 show the highest hydrophytotermical coefficient or 2,15, which is almost 29% higher value in comparison with Ø1.