Estimation of herbicide bioconcentration in sugarcane (Saccharum officinarum L.)

Ciência Rural

Queiroz, Sonia Claudia Nascimento de²  Matallo, Marcus Barifouse¹  Paraíba, Lourival Costa²  Franco, Daniel Andrade de siqueira¹  Cerdeira, Antonio Luiz²  Ferracini, Vera Lúcia² 

[1] Agência Paulista de Tecnologia dos Agronegócios, Campinas, Brazil;Embrapa meio Ambiente, Jaguariúna, Brazil

关键词: herbicide;    bioconcentration factor;    plant uptake;    model;    bagasse adsorptionRESUMOA cana de açúcar é uma cultura importante para produção de açúcar e biocombustíveis no Brasil e exige elevada utilização de herbicidas;   

DOI  :  10.1590/0103-8478cr20120466

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

Sugarcane is an important crop for sugar and biofuel production in Brazil. Growers depend greatly on herbicides to produce it. This experiment used herbicide physical-chemical and sugarcane plant physiological properties to simulate herbicide uptake and estimate the bioconcentration factor (BCF). The (BCF) was calculated for the steady state chemical equilibrium between the plant herbicide concentration and soil solution. Plant-water partition coefficient (sugarcane bagasse-water partition coefficient), herbicide dilution rate, metabolism and dissipation in the soil-plant system, as well as total plant biomass factors were used. In addition, we added Tebuthiuron at rate of 5.0kg a.i. ha-1 to physically test the model. In conclusion, the model showed the following ranking of herbicide uptake: sulfentrazone > picloram >tebuthiuron > hexazinone > metribuzin > simazine > ametryn > diuron > clomazone > acetochlor. Furthermore, the highest BCF herbicides showed higher Groundwater Ubiquity Score (GUS) index indicating high leaching potential. We did not find tebuthiuron in plants after three months of herbicide application

【 授权许可】

Unknown