Agronomía
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Item Respuesta agronómica de dos híbridos de brócoli (Brevicorine Brassicae L) utilizando fertilización química, orgánica y convencional en la parroquia San Pablo de Atenas, cantón San Miguel, provincia Bolívar(Universidad Estatal de Bolívar . Facultad de Ciencias Agropecuarias . Escuela de Ingeniería Agronómica, 2012) Carrasco Aguiar, Gladis Marlene; Zapata, OlmedoThe cultivation of broccoli in the last decade has reached very important levels of the increment of the cultivated surface, the production and consumption at world level, mainly for its agronomic characteristics, varietals and nutritional of excellent quality. This investigation was carried out in the place Logmapamba, parroquia San Pablo de Atenas, canton San Miguel, Bolívar province, to an altitude of 2.400 msnm. The was planted May 01 2011. The main objectives were: i) Determine the agronomic behavior of the hybrid ones of broccoli Legacy and Crowned in this area agroecologyc. ii) Identify what fertilization type (Chemistry, organic and conventional) it is the most appropriate in the production of broccoli. iii) Carry out the economic analysis in the relationship Benefice/Cost. A design of Complete Blocks was used at random (DBCA) in factorial arrangement 2x3. The factor A it corresponded at two hybrid of broccoli: A1: Crowned and A2: Legacy. The factor B to three fertilization dose: B1: Good Chemical: 200-60-80-30 kg/ha of N-P-K-S; B2: Good organic: 500 kg./ha of Ecoabonaza and B3: Conventional. Six treatments were had with three repetitions. They were carried out variance analysis, main effect for hybrid of broccoli, test of Tukey for fertilization dose and interactions. Correlation analysis was made and economic of the relationship benefit-cost. The main results were: The best treatment was the T1: A1B1 (Hybrid Crowned + 200-60-80-30 Kg./ha of N-P-K-S) that reached a yield of 16.540 Kg./ha. The independent variables that increased the yield of broccoli were the height of plants to the 30 ddt and the crop; number of leaves to the 30 ddt and the crop; wide and longitude of the leaf in cm and weight of the pellet. While those that diminished the yield later plants that it corresponded the hybrid Legacy. With the complete chemical analysis of the floor before and after the rehearsal, in the treatments where the Ecoabonaza was applied, they improved the physical and chemical characteristics of the floor the 98 organic matter it was increased. Economically the best technological alternative was the T5: Hybrid Legacy + 500 Kg./ha of Ecoabonaza, with a relation Benefit-cost of 1,20 and a relation entrance-cost of 0,20