Hormesis de glyphosate em cana-de-açúcar

• Autor(a) principal: Pincelli-Souza, Renata Passos [UNESP]
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/123371; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/30-04-2015/000829242.pdf
• topic: Cana-de-açúcar - Doenças e pragas; Plantas - Efeito dos herbicidas; Produtividade agrícola; Herbicidas; Sugar-cane

Currently, both in agricultural production and in areas of human health sector, the low dose effect of products applied, termed as hormetic, has been widely debated and researched in order to understand the mechanism of stimulating and beneficial action of several substances initially considered as toxic, when applied in high doses. The objective of this research was to investigate the effect of low dose of glyphosate on growth, phosphorus accumulation in the shoot, the production of shikimic and quinic acid, and final yield of sugarcane. The experiments were planted on November 05, 2010 in Research and Development Unit of Jaú, SP, APTA Polo Midwest / SAA, and carried out and evaluated over the course of the year in sugarcane plant cane. The variety used was SP80-1842. Two experiments were carried out to evaluate the effect hormetic during growth and development of sugarcane and cane yield and sugar. The treatments consisted at application or not of low dose of glyphosate. The spraying was at 70 DAP and the low dose dose used was 1.8 g a e ha-1 glyphosate. In the first experiment evaluated the growth and development of the sugar cane crop in portions of three planting rows of three meters, in which it was collected a linear meter for evaluations in eight times, or , 70, 105, 140, 175, 210, 245, 280 and 315 days after planting, in a randomized block design with six replications. In the second experiment, productivity was evaluated of stalks and sugar, plots were used in five plant lines by eight meters were willing randomized block design with six replications, and collected at the end of the cycle, or, to 315 DAP. At each sampling time, the first experiment examined content of shikimic acid, quinic acid ...