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- Title
Influência do glifosato na eficiência nutricional do nitrogênio, manganês, ferro, cobre e zinco em soja resistente ao glifosato.
- Authors
Serra, Ademar Pereira; Marchetti, Marlene Estevão; Candido, Ana Carina da Silva; Dias, Ana Caroline Ribeiro; Christoffoleti, Pedro Jacob
- Abstract
After development of glyphosate-resistant (GR) soybean, there is a considerable raise in the use of this herbicide, with three to four applications during the culture cycle. Thus, these applications may be influencing the mineral nutrition of the crop. So, the aim of this research was evaluate the glyphosate influence on uptake, translocation and use efficiency of N, Mn, Cu, Zn and Fe by (GR) soybean 'P98R31' cultivar. The experiment was conducted in the greenhouse at ESALQ/USP, Piracicaba, State of São Paulo, Brazil, in 2009. The experimental unit was formed by 11kg vase-1 of soil (Rhodic Paleudult) with two plants in each vase. The treatments have been arranged in a factorial pathway 5X5, with five levels of the factor Mn (0, 20, 40, 60 and 80mg dm-3) and five of glyphosate drifts (0; 0,648; 1,296; 1,944 e 2,592kg e.a. ha-1) and the Mn was supplied by the manganese sulfate (MnSO4.H2O). The experimental design was randomized blocks, with four repetitions. There was no influence on response from plants concerning the levels of Mn used into the experiment. The application of glyphosate interfered on mineral nutrition of soybean and the total contents of N, Mn, Cu, Zn and Fe. The use of glyphosate has caused reduction of the nodules number and reduced the output of dry mass.
- Subjects
PIRACICABA (Brazil); BRAZIL; SOYBEAN research; PHYSIOLOGICAL effects of glyphosate; CROP nutrition; MANGANOUS sulfate; HERBICIDES; NITROGEN
- Publication
Ciência Rural, 2011, Vol 41, Issue 1, p77
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782011000100013