Pulverização de glyphosate utilizando solução de uréia + sulfato de amônio

Revista Brasileira de Herbicidas

Heryaldo Tarozzo Filho¹  Ana Carolina Ribeiro Dias⁵  Saul Jorge Pinto Carvalho³  Pedro Jacob Christoffoleti⁴  Virginia Damin² 

[1] Syngenta;Universidade Federal de Goiás;IFSULDEMINAS - Campus Machado;ESALQ / USP;Escola Superior de Agricultura "Luiz de Queiroz" - ESALQ/USP

关键词: eficácia;    fertilizantes;    Sorghum halepense;    Brachiaria decumbens;   

DOI  :  

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Several trials have been carried out for increasing glyphosate efficacy on weed burndown, including the addiction of ammonium sulfate and urea as adjuvants. On a physiological approach, there are explanations to complementary effect of these fertilizers when concomitantly added to herbicide spray solution. Therefore, three experiments were developed in field conditions with the objective of evaluating glyphosate efficacy for burning down different weed species by using solution of nitrogen fertilizers as spraying vehicles. Six treatments were evaluated, as follows: glyphosate (540 g a.e. ha -1 ) application using water, solution of ammonium sulfate – AMS (15 g L -1 ), solution of urea – U (5 g L -1 ), solution of U+AMS (2.5 + 7.5 g L -1 ) as spraying vehicles, glyphosate at 1080 g a.e. ha -1sprayed with water, and check without application. Treatment’s efficacy was evaluated on mixed community of weeds,Brachiaria decumbensandSorghum halepense . The use of nitrogen fertilizer solutions as glyphosate spraying vehicles did not increaseB. decumbenscontrol. The lower rate of glyphosate had higher efficacy over mixed weed community and overS. halepensedue to the use of ammonium sulfate (15 g L -1 ) or U+AMS (2,5 + 7,5 g L -1 ) solution as spraying vehicles. The positive results reached after glyphosate application with nitrogen fertilizers were also observed on the reduction of the mixed weed community fresh mass and forS. halepensefresh and dry mass.

【 授权许可】

Unknown