Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 2
Written by Șerban Cătălin DOBRE, Doru Ioan MARIN
On the ARDS Caracal chernozem, in the last two years, 2018 and 2019, were tested a number of nine sunflower hybrids (Performer, Euromis, Generalis, Terramis, Neoma, Diamantis, Subaro, FD15C27 and FD116M1) sown at three different plant density: 43,000 pl/ha, 57,000 pl/ha and 71,000 pl/ha. The green biomass was determined at 3 different moments: at 44 days, 54 days and 68 days after emergence. The interactions studied showed that the hybrids have a vegetative growth (green biomass) differentiated according to the plant density, hybrid and the moment of determination. As much as the plant density increases, the biomass decreases very significantly. Also, green biomass, regardless of the time of determination, is significantly correlated with production. There are very significant differences between the green biomass determined at the first and the second plant density, at the first and the third plant density, but disappears between the second and the third plant density, at each moments of determination.
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