EVALUATION OF DOSES OF MONOAMONIUM PHOSPHATE AND COATED MONOAMONIUM PHOSPHATE IN THREE DIFFERENT POLYMERS ON CORN CROP IN NO TILL SYSTEM

• Grant number: 10/09348-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: November 01, 2010
• End date: October 31, 2011
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Salatier Buzetti
• Grantee: Rodolfo de Niro Gazola
• 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. 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 phosphorous, monoammonium phosphate and three coated monoammonium phosphate, in the production components and productivity of the corn 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 13 treatments and 4 repetitions is being used. The treatments consist of 4 doses of P2O5: 0, 50, 100 and 150 kg ha-1, applied at sowing, in four sources: monoamonium phosphate and coated monoamonium phosphate by three different polymers. It will be appraised in the corn crop: P 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.