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- Title
Foliar application of manganese in transgenic soybean tolerant to glyphosate.
- Authors
Basso, Claudir José; Santi, Antonio Luis; Lamego, Fabiane Pinto; Girotto, Eduardo
- Abstract
The yellowing of Roundup Ready soybean after glyphosate application, can be associated to a momentary manganese deficiency. Because of that, with the hypothesis that glyphosate tolerant soybean would need supplementary addition of manganese, the objective of this research was to evaluate different managements in the foliar application of manganese in some soybean parameters. It was developed two experiments, one at Taquaruçd do Sul and other at Boa Vista dos Missbes, RS in the year of 2009/2010. It was tested the following treatments: I) without glyphosate application with manual weed control and without manganese foliar application (untreated check); 2) without glyphosate application with manual weed control and one manganese foliar application at 7 days after this manual weed control; 3) with glyphosate application and without manganese foliar application; 4) glyphosate application in mixture with manganese; 5) glyphosate application added of one manganese foliar application at 7 days after glyphosate application; 6) glyphasare application added of manganese foliar application split in t%vo times, at 7 and 14 days after glyphosate application; 7) glyphosate application and one of manganese foliar application at /4 days after glyphosate application. The glyphosate application was realized in the VS soybean stage, using 720g L-1 i.e, while the used dose of Mn was 2.0 L ha-1 of a formulation with 14% (m/v) of Mn. There were no significant difference among the treatments to plant height and height insertion of the first legume. The glyphosate application did not affect the absorption and the foliar amount of manganese and nitrogen in soybean crop. Even with the increase in foliar manganese amount, there was no increasing in soybean productivity. This shows that in soils with Mn levels above of the sufficient, it is not necessary foliar manganese addition in genetically modified soybean tolerant to glyphosate.
- Subjects
SOYBEAN research; PHYSIOLOGICAL effects of glyphosate; FOLIAR application of plant regulators; EFFECT of manganese on plants; WEED control
- Publication
Ciência Rural, 2011, Vol 41, Issue 10, p1726
- ISSN
0103-8478
- Publication type
Article