Fertilización foliar del frijol común (Phaseolus vulgaris L.): I. El efecto del tiempo de aplicación de nitrógeno

Abstract

To study the effects of foliar fertilization with nitrogen in different stages of plant growth, two field experiments were set out in a sandy loam soil. The first experiment was conducted during the wet season and the second during the dry season. Nitrogen (32-0-0) was applied on the leaves at the level of 20 llha on three different dates divided twice: 15 and 30, 30 and 45, 45 and 60 days front seedling emergence. All of the plots received a basic soil fertilization with 80 kg/ha of P2 O5, 30 kg/ha of K2O applied in the row plus 30 kg/ha of N topdressed 15 days after seedling emergence. Foliar nitrogen fertilization at 30 and 45 days after seedling emergence increased bean production by 18% in the wet season and 39% in the dry season. It was noticed that late season application of nitrogen on the leaves caused an increasing in the thousand-grain weight.