Soy productivity and bases in soil solution for each correction of soil acidity

• Grant number: 16/19182-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: December 01, 2016
• End date: November 30, 2017
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Ciro Antonio Rosolem
• Grantee: Thais Do Nascimento Santiago Pereira
• Host Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
• Associated research grant: 15/50305-8 - A virtual joint centre to deliver enhanced nitrogen use efficiency via an integrated soil-plant systems approach for the UK & Brazil, AP.TEM

Abstract

Liming is essential for soil acidity correction, providing adequate root growth, the required nutrient absorption and thus obtaining high yields. For soybeans the correction of acidity is still very important for efficient biological nitrogen fixation. The correction of acidity with lime does not always result in neutralization of Al in depth, which affects the root growth, hence the importance of their application associated with phosphogypsum. The central objective of this study is to evaluate the productivity of soybean due to soil acidity correction using limestone and gypsum, as well as the effect of correctives in the solution and in the soil profile under direct sowing. The research will be conducted in Botucatu, SP, with the summer crop soybeans in the crop years 2016 to 2017. The soil of the experimental area will be sampled in the layers of 0-10, 10-20, 20-40, 40-60 , 60-80 and 80-100 before treatment application, and prior to soybean planting, in 2016 (November / December) and 2017 (March / April) to determine the Ph, Al and exchangeable bases in the different layers and fertility in the soil solution. The investment and the persistence of straw on the soil shall be periodically assessed by determining the mass of dry plant waste and nutrient content. At the end of the experiment will determine the productivity and nutrient balance absorbed into the system. (AU)