Emergency Periodicity and Seeds Bank of Weeds in Systems of Tillage and No Tillage
Plant
Volume 7, Issue 3, September 2019, Pages: 54-61
Received: Jul. 19, 2019; Accepted: Aug. 28, 2019; Published: Sep. 10, 2019
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Authors
André Luiz de Souza Lacerda, Departament of Vegetable Production, São Paulo of University, Piracicaba, Brazil
Ricardo Filho Victoria, Departament of Vegetable Production, São Paulo of University, Piracicaba, Brazil
Cristiane Gonçalves de Mendonça, Agronomy Faculty, Mato Grosso do Sul University, Aquidauana, Brazil
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Abstract
In Brazil there is lack of information about the weed emergency periodicity from the seed bank in the soil. This information is important to the elaboration of a strategy of weeds management. The objective of this research was to evaluate emergency periodicity of weeds by a frequent application of glyphosate used to determine the seeds bank in two systems of handling of the soil (tillage and no tillage). The experiment was conducted in the district of Piracicaba-SP, during two years, on the Dept. of Vegetable Production of ESALQ/USP. The experimental design was of completely randomized blocks with subdivided portions, repeated four times. The treatment consisted in glyphosate applications rates of 0, 540, 720, 900, 1080, 1260 and 1440 g.i.a ha-1. Weeds were sampled through the method of iron square and the seeds bank was determined by withdrawing of soil in depths of 0-2.5, 2.5-5.0, 5.0-10.0, 10.0-15.0 and 15.0-20.0cm. The herbicide glyphosate was shown effective in controlling weeds. In the year of 2001, they happened periodicitys of emergency more differentiated in the no tillage that in the tillage, but in the year of 2002, those differences of periodicitys in the species were not as expressive. The seeds concentrated layer superficial of the soil, in the no tillage system, while the tillage preparation in the soil distributed the seeds in the profile of soil.
Keywords
Glyphosate, Richardia Brasilensis, Digitaria Insularis, Soil Depth, Seeds Bank
To cite this article
André Luiz de Souza Lacerda, Ricardo Filho Victoria, Cristiane Gonçalves de Mendonça, Emergency Periodicity and Seeds Bank of Weeds in Systems of Tillage and No Tillage, Plant. Vol. 7, No. 3, 2019, pp. 54-61. doi: 10.11648/j.plant.20190703.15
Copyright
Copyright © 2019 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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