Sorption and persistence of sorgoleone in Red-Yellow Latosol

Química Nova

Reis, César¹  Universidade Federal de Viçosa, Viçosa¹  Silva, Antonio A.¹  Demuner, Antonio J.¹  Chinelatto Jr., Luiz S.¹  Barbosa, Luiz C. A.¹ 

关键词: allelopathy;    sorghum;    sorption isotherm.;   

DOI  :  10.1590/S0100-40422005000300016

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The root exudates produced by sorghum contain a biologically active constituent known as sorgoleone. The behavior of sorgoleone in a Red-Yellow Latosol was studied. The sorption model of sorgoleone in soil was better adjusted to the Freundlich equation, through the coefficients Kf (capacity of sorption) and 1/n (linearity of the isotherm). The persistence of sorgoleone in soil and its possible degradation were also evaluated by monitoring their residues in the soil along the time. Recovery rate of sorgoleone from the soil reached 93% after 24h. It was verified that sorgoleone is strongly sorbed in the soil and its half-life is 10 days, under the experimental conditions. The presence of sorgoleone or its metabolites was not detected in the soil after 60 days.

【 授权许可】

Unknown