Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/29209
Title: Sobressemeadura da soja como técnica para supressão da emergência de plantas daninhas
Other Titles: Soybean crop oversowing used as a technique to suppress weed emergence
Keywords: Sobressemeadura da soja
Plantas de cobertura
Integração lavoura-pecuária
Plantas daninhas - Manejo
Soybean crop oversowing
Cover crop
Crop-livestock integration
Weeds - Management
Issue Date: 2009
Publisher: Sociedade Brasileira da Ciência das Plantas Daninhas
Citation: PACHECO, L. P. et al. Sobressemeadura da soja como técnica para supressão da emergência de plantas daninhas. Planta Daninha, Viçosa, MG, v. 27, n. 3, p. 455-463, 2009.
Abstract: The objective of this experiment was to evaluate the efficiency of soybean oversowing, using cover crops, in reducing weed emergence and its reflections on the productivity of the soybean cultivated in the following season. The experiment was arranged in a randomized block design, in split-plot, with four replications. The soybean was sown four times: 1) 10/27/2005, 2) 11/10/2005, 3) 11/24/2005 and 4) 12/14/2005, under a no-tillage system, corresponding to four times of soybean oversowing, occurring respectively, on 01/30/2006; b) 02/13/2006; c) 02/22/2006; and d) 03/14/2006. Six cover crops were evaluated [Brachiaria brizantha, B. ruziziensis, B. decumbes, Eleusine coracana, Pennisetum glaucum and cover crop - sorghum hybrid (Sorghum bicolor cv. Bicolor) with Sudan- grass (Sorghum bicolor cv. Sudanense)] and untreated (spontaneous vegetation) in four oversowing times. Oversowing was performed manually when the soybean reached the R7 stadium (beginning of defoliation during physiological maturation), in each of the four sowing times of the 2005/06 soybean crop. The first cover crop desiccation was carried out on 10/23/2006. After 20 days, the second desiccation was applied, followed by soybean sowing, cultivar MSOY 6101, early cycle, 0.45 m spaced, aimed at a population of 500.000 plants ha-1 . Soybean oversowing, especially when using brachiaria, showed to be an important tool for the integrated management of weed plants, since it provides a larger biomass contribution and soil cover and sustainability to no-till systems in the cerrado.
URI: http://repositorio.ufla.br/jspui/handle/1/29209
Appears in Collections:DFP - Artigos publicados em periódicos



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