Redutores de pH e complexantes de metais em condições de laboratório

Revista Brasileira de Herbicidas

Ana Silva Possamai¹  Rivanildo Dallacort¹  Roberto Akitoshi Komatsu⁴  Miriam Hiroko Inoue³  Ricardo Ferri Tanahashi⁴  Marcos Antônio Piza² 

[1]Departamento de Agronomia - UNEMAT

[2]Universidade Tecnológica Federal do Paraná, Unidade de Campo Mourão

[3]Universidade do Estado de Mato Grosso - UNEMAT

[4]Faculdade Integrado de Campo Mourão

关键词: Adjuvantes;    calda de pulverização;    dureza da água;    herbicidas;   

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 】

The research aimed to evaluate the behavior of various pH reducers and metals complexers, under laboratory conditions. Were used 15 commercial products (10 pH reducers and 5 metals complexers), added to the spray mix. Five experiments were conducted; two to assess the stability of pH, after addition of pH reducers (Experiment 1) and metals complexers (Experiment 2) at 1% concentration, two to determine the necessary quantity of pH reducers (Experiment 3) and metals complexers (Experiment 4) to pH 3.5, an experiment to evaluate the reduction Ca activity in CaCO3, after addition of metals complexers (Experiment 5). Treatments with pH reducers do not differ and were statistically lower than the control (Experiment 1). Redumax was the complexer which has the lowest pH of the solution, with pH 1.3 (Experiment 2). In Experiment 3, pH Fos (0.06 L), P 30 (0.07 L) and Ubyphos (0.08 L) were the products that were used the smaller rate to reduce pH. The largest rate necessary was observed for NP10 with 0.8 L (Experiment 3). The product that uses the smallest volume in Experiment 4 was Redumax (0.12 L). L1 was the complexer that required higher rate, with 3.56 L (Experiment 4). No significant difference between L1 and control in Experiment 5, showing that this product does not confer complexant action.

【 授权许可】

Unknown