Strategies for in situ sampling of macronutrients and micronutrients of soil

• Grant number: 12/08205-8
• Support Opportunities: Regular Research Grants
• Start date: August 01, 2012
• End date: July 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Chemistry
• Principal Investigator: Marcos Yassuo Kamogawa
• Grantee: Marcos Yassuo Kamogawa
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil

Abstract

The traditional soil sampling and chemical analysis do not evaluate important parameters for plant nutrition, like as: water retain, sunlight, microbial activity, transport phenomena, physical structure, hydraulic conductivity and the diffusion of ions. In situ extraction of soil solution, seems as a promising alternative to conventional sampling, that sampling devices introduced into soil are submitted to the same environmental factors that the plants. With the purpose to develop and evaluate strategies for in situ soil solution sampling, looking for simplicity in sampling and chemical analysis, low cost, versatility and robustness, this project aims to investigate three devices, based on: i) the absorption of soil solution by capillarity in paper, ii) the principle of the ion exchange in resin, and iii) the diffusion in thin films by concentration gradients (DGT). All devices will be introduced into the soil and absorbing the nutrients, establishing the concentration equilibrium in function of time. The devices will be conducted at the laboratory and the macro-and micronutrients are extracted and quantified by atomic absorption spectrophotometry, molecular absorption spectrophotometry and flow injection analysis system. The three devices provide complementary information, the paper will assess the nutrients in soil solution (soluble fraction), the resin, assess the nutrients in soluble and labile form (exchange complex) and based on DGT, allow inferences about the chemical species soil solution. Experiments to evaluate the influence of factors such as: temperature, water retention capacity, diffusion of ions in the soil and mass flow will be realized. The results will be correlated to the total content in plants and devices developed. The development of analytical procedure in situ sampling, will contribute not only to the plant nutrition area, but for ion movement studies of in soils, fertilization, soil contamination and other correlated areas. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

COLZATO, MARINA; FERRACCIU ALLEONI, LUIS REYNALDO; KAMOGAWA, MARCOS YASSUO. Cadmium sorption and extractability in tropical soils with variable charge. ENVIRONMENTAL MONITORING AND ASSESSMENT, v. 190, n. 6, JUN 2018. (11/19944-3, 12/08205-8, 11/23498-9)

MARCOS Y. KAMOGAWA; JEOVÁ CORREIA MIRANDA. Uso de hardware de código fonte aberto "Arduino" para acionamento de dispositivo solenoide em sistemas de análises em fluxo. Química Nova, v. 36, n. 8, p. 1232-1235, 2013-00-00. (12/08205-8, 11/23498-9)

MACHADO, JEANE M. C.; MELCHERT, WANESSA R.; ZAGATTO, ELIAS A. G.; KAMOGAWA, MARCOS Y.. A Multi-Pumping Flow System with Pulsed Fluidization to Evaluate Soil Capacity for Phosphate Adsorption. Journal of the Brazilian Chemical Society, v. 28, n. 7, p. 1149-1157, JUL 2017. (13/00524-0, 11/19944-3, 12/08205-8, 11/23498-9)