Title:	Simulation of picloram leching in a brazilian latossol usingdrainage lysimeter under brachiaria deumbens vegetation.
Authors:	MANTOVANI, E. C. SCORZA JUNIOR, R. P. FOLONI, L. L.
Affiliation:	EDEMIR CELSO MANTOVANI, FACULDADE DE TECNOLOGIA DE SOROCABA ROMULO PENNA SCORZA JUNIOR, CPAO LUIZ LONARDONI FOLONI, UNIVERSIDADE ESTADUAL DE CAMPINAS.
Date Issued:	2008
Citation:	In: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING; BRAZILIAN CONGRESS OF AGRICULTURAL ENGINEERING, 37.; INTERNATIONAL LIVESTOCK ENVIRONMENT SYMPOSIUM - ILES, 8., 2008, Foz do Iguaçu. Technology for all: sharing the knowledge for development: proceedings... Foz do Iguaçu: SBEA, 2008.
Description:	This work had the aim to study the leaching of the herbicide picloram in field conditions using a drainage lysimeter under Brachiaria decumbens vegetation and also to test the MACRO model to simulate the leaching of this herbicide. The experiment was carried out in the experimental area of the Agricultural Engineering Faculty in the State University of Campinas, in Campinas, São Paulo State, Brazil. The modified drainage lysimeter had 2 m diameter and 3m depth. Soil solution samples were collected in 10 points of 30-cm depth intervals using PVC tubes and were always collected one day after rainfall between October 2006 and March 2007. Quantification of picloram was done using gas chromatography linked to mass spectrometry. Sorption coefficient and degradation rate coefficient at 20°C were also obtained in laboratory. Results have shown that about 455 µg L-1 of picloram leached to 30 cm depth after 11 days of application. Picloram did not leach to below 30 cm depth. MACRO model did simulate the concentration peak of picloram after 11 days of application but overall simulated concentrations were underestimated.
Thesagro:	Irrigação Lisímetro Solo
Keywords:	Brasil
Notes:	Publicação original em CD.
Type of Material:	Artigo em anais e proceedings
Access:	openAccess
Appears in Collections:	Artigo em anais de congresso (CPAO)