Evaluation of different doses of nitrogen from urea and coated urea on corn and common bean crop in no till system

• Grant number: 09/01935-8
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2010
• End date: December 31, 2010
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Salatier Buzetti
• Grantee: Paulo Ricardo Maestrelo
• Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil

Abstract

The corn crop is among the one of higher productivity potential, although in Brazil this potential is below the productivity of this crop. The common bean is the principal food presents in the diet of the Brazilian population, excellent source of protein. For the obtaining of high productivities and viable economically, the adopted mineral nutrition is one of the essential factors for success, in consequence of appropriate practices of fertilization, as nitrogen, once it is the element more demanded by those crops. The study aims to study doses and sources of nitrogen, urea and coated urea, in the production components and productivity of the corn and common bean crops. The experiment is being led in experimental area belonging to University of Engineering of Ilha Solteira - UNESP, located in Selvíria - MS, in a Red Latosol, loamy texture. A randomized blocks design with 8 treatments and 4 repetitions is being used. The treatments consist of 4 doses of N: 0, 40, 80 and 120 kg ha-1, applied at covering in the stadium of 6 leaves completely developed, in two sources: urea or coated urea for polymers. It will be appraised in the corn crop: N content in the leaf, height of plant, height of insert of corn ear, diameter of the stem, number of grains for row of corn ear and number of rows for corn ear, mass of 100 grains and the productivity of grains. In the crop of common bean: N content in the leaf, number of pods for plant, number of grains for plant, mass of 100 grains and productivity of grains. (AU)