IRRIGATION DEPTHS AND NITROGEN RATES IN COVERAGE IN THE DRY BEAN - DOI: 10.13083/1414-3984.v22n04a07

Abstract

The irrigation of the dry bean during the winter season has resulted in productivity above the annual average, mainly due to increases in technology and nitrogen fertilizers. The objective of this study was to evaluate the response of the dry bean to different irrigation depths and nitrogen fertilization in Aquidauana, MS, Brazil. The experiment was conducted at the Unidade Universitária de Aquidauana- Universidade Estadual do Mato Grosso Sul, using the dry bean cultivar “Pérola” sown in July 2005. A randomized block experimental design was used with split plots consisting of three blocks and two replications in each block. The plots consisted of three irrigation depths (16.5, 27.6 and 30.5 mm) corresponding to 50, 30 and 27% of the field capacity, respectively, and four nitrogen fertilizer levels (0, 50, 100 and 150 kg ha-1). We evaluated the number of pods per plant, grain number per plant, grain number per pod, weight of 100 grains, grain yield per plant and grain yield, and agronomic efficiency. It was concluded that irrigation depths based on field capacity do not influence the production components and grain yield of the dry bean. The number and yield of grains per plant and the weight of 100 grains are influenced by the coverage nitrogen rates in dry bean.