Availability of phosphorus in the soil, nutritional status and production of sugarcane ratoon fertilized with phosphorus protected by polymers

• Grant number: 18/12271-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2019
• End date: May 31, 2020
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Reges Heinrichs
• Grantee: Igor Virgilio Ribeiro
• Host Institution: Faculdade de Ciências Agrárias e Tecnológicas. Universidade Estadual Paulista (UNESP). Campus de Dracena. Dracena , SP, Brazil

Abstract

Brazil is the world's largest producer of sugarcane, with more than 9 million hectares planted in the 2015/2016 harvest, that representing 2.3% of the country's agricultural area. The crop is demanding on soil fertility to achieve high productivity, with great emphasis on phosphorus due to widespread lack in Brazilian soils. The objective of this work is to evaluate the fertilization with phosphate fertilizer protected by polymers in sugarcane ratoon, availability of phosphorus in the soil, nutritional state of the plants and production of stems. The experiment will be conducted at the production unit of a sugarcane mill, in the western region of São Paulo State . The experimental design will be in a randomized block with four replicates. The treatments will be arranged in a 2 x 5 factorial scheme, composed of two sources of phosphorus (monoammonium phosphate and monoammonium phosphate protected by polymers) and five doses of phosphorus (0, 20, 40, 60, 80 kg/ha of P2O5). The following parameters will be evaluated: Macronutrient and micronutrient content in the diagnosis leaf, soil phosphorus (Resine, Mehlich 1 and Total), stems production and visual evaluation of the experiment. All the results will be evaluated statistically by the analysis of the variance, interaction between the factors, comparison of means by Tukey test for the sources and regression for the doses.