RESEARCH REGARDING THE BEHAVIOUR OF SOME MAIZE HYBRIDS UNDER DIFFERENT CONDITIONS OF TECHNOLOGY AND WATER SUPPLYING IN THE SOUTH OF ROMANIA PUBLISHEDD. S. Niţu, Oana Alina Mardare, Ionel Jinga, S. Câmpeanu
The researches were performed at NARDI Fundulea during 2004-2006, as a poly-factorial experiment. At A factors (crop technology) two graduations were tested, at B factor (irrigation regime) six graduations were tested and at C factor (genotype) three graduations were tested. The agricultural year 2004-2005 was excessively rainy, the annual rainfall sum being of 1138.7 while 2005-2006 was droughty, the annual rainfall sum being of 494.5 mm vs. multi-annual average of 584.4 mm. From the temperatures viewpoint, the agricultural year 2004-2005 was normal, the annual average of 10.8 degree C being very close of multi-annual average, 10.6 C and year 2005-2006 was almost normal, annual average exceeding multi-annual one with only 1.2 C. The paper presents the average of the two years of research. The crop technology brings a gain of 20.4 q/ha in variant N180P60, 70,000 pl/ha vs. variant N100P60, 40,000 pl/ha, the gain being statistically ensured as very significant. Among irrigation variants, the highest gain, 14.25 q/ha, was achieved by irrigation variant of 50% active moisture interval on 80 cm depth, with half of norm by sprinkling, vs. non-irrigated variant, the gain being statistically ensured as very significant. Close values of the maximum yield gain were registered by the irrigation variant 50% active moisture interval, on 80 cm depth, whole irrigation norm by overhead irrigation. In this case, the gain was 13.89 q/ha, statistically ensured as very significant. Among tested genotypes, the highest yield gain was given by hybrid Campion, 10.98 q/ha, statistically ensured as very significant.
limited water supplying; watering rate; genotype; irrigation norm