Respuesta de hibridos de maiz normales y de alta calidad de proteina a la fertilizacion quimica | Response of common and high quality protein corn hybrids to chemical fertilization
2005
Palafox-Caballero, A. | Tosquy-Valle, O.H. | Sierra-Macias, M. | Turrent-Fernandez, A. | Espinosa-Calderon, A.
During the rainy season, productivity of maize in Veracruz, Mexico, is affected by inadequate management, mainly lack of use of improved seeds and deficient practices of fertilization. Thus, to improve production technology and increase the productivity and profitability of corn, during the spring summer seasons 2001 and 2002, two agronomic experiments were carried out. The experimental design was randomized blocks arranged in split plots. The large plots corresponded to 24 treatments of N-P-K ranging from 0-160, 0-120, and 0-120 kg ha(-1), respectively. In 2001, in the small plots the hybrids H-363 C, H-519 C, and HV-521 C with high protein quality and H-520, H-512 (check 1) and C-343 (check 2) were planted. In 2002, in these plots the hybrids H-519 C, H-553 C, H-558 C of high protein quality and H-518, H-520, and C-343 (check) of normal protein quality were used. Grain yield and harvest index were evaluated. Nitrogen application at levels above 129 kg ha(-1) was determinant in obtaining the highest yield. The hybrids H-520, H-518, H-553 C and H-519 C were significantly different from check 1 H-512 and competed with C-343. In general, positive response in grain yield was found with high levels of fertilization. The best economic and sustainable alternative was the dosage 129-23-23, with a net utility of $ 3296.00 ha(-1) and a rate benefit-cost of 1:1.53.
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