Efecto de la fertilización con azufre en la cebolla de rama (Allium fístulosum L.), en el municipio de Carmen de Carupa, Cundinamarca.
Cabezas Gutiérrez, Marco | 2005-07
ln order to evalúate two sources and four doses of sulfur for production and econom ic benefit of Alium fístulosum, an experiment was carried out at the plateau of Carmen de Carupa (Cundinamarca). The fertilizers, ammonium sulfate and calcium sulfate were tested, at the rate of 25, 50, 75 and lOOkg/ha of sulfur, using a divided plot design, where the main plot corresponded to the sulfur source and the secondary one to the dosage. In each main plot an absolute check, without sulfur, was employed and at the end the average data were calculated in order to make the respective comparisons. The experimental unit consisted in five rows, of four meters length each, for a total of 56 plants. Yield components, number of bunches per plant, individual bunch weight and fresh plant weight were evaluated. Plant dry matter was also determined and a cost benefit analysis of the fertilizer application was realized. It was demonstrated that under the experimental conditions the use of calcium sulfate proved to be better than ammonium sulfate regarding the total yield, while the treatments with ammonium sulfate contributed to an important increase of the dry matter percentage of the plant. The most favorable cost benefit analysis not necessarily coincided with the mayor gain margin, wherefore it is recommended to use 50 and 75kg of sulfur, in the form of calcium sulfate to obtain an agronomic and economic optimal profit.