INFLUENCE OF CROP SYSTEMS IN REDUCING OF DROUGHT EFFECT FOR MAIZE PLANTS
2015
Nicolae IONESCU
Currently, new maize hybrids have had improved genetic traits. These characters are high production capacity and resistance to drought (Ali & Naidu, 1982). As the phenomena of increasing present drought affects maize plants (Dwyer & Steward, 1985; Lorens et al., 1987), so that grain yields that obtained are smaller (Undersander, 1987). Us, ordinary maize suffer from drought during maximum water consumption: July and August. Reducing the effects of drought can be done by different planting systems. The period under review was a dry year, a favorable year and a normal one. Of the three experimental factors (sowing date, density, new hybrids), the greatest influence was a time of sowing. The optimum time of sowing maize is held here from 10 April to 10 May. Early sowing favored obtain maximum yields of between 6.3 t.ha-1 in dry, 8.0 t.ha-1 in favorable and 5.9 t.ha-1 in a medium year. Late sowing maize produced more less with 4.0 t.ha-1 dry year, 3.6 t.ha-1 in favorable and 2.3 t.ha-1 in normal conditions. Density had positive influence in favorable year, with 50 thousand plants.ha-1 and 30-50 thousand plants.ha- 1 in the other two years. Cultivated hybrids with high production potential, demonstrated adaptability in these culture conditions. The new creations Iezer (F.125) Mostiştea, F.425 and F.475M along side Olt is recommended in the southern white luvisol.
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