Sorption and persistence of sorgoleone in Red-Yellow Latosol

Quimica nova

Reis, César¹  Silva, Antonio A.¹  Demuner, Antonio J.¹  Chinelatto Jr., Luiz S.¹  Barbosa, Luiz C. A.¹ 

[1] Universidade Federal de Viçosa, Viçosa

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 exudatesproduced by sorghum contain a biologically active constituent known as sorgoleone.The behavior of sorgoleone in a Red-Yellow Latosol was studied. The sorptionmodel of sorgoleone in soil was better adjusted to the Freundlich equation,through the coefficients Kf (capacity of sorption) and 1/n (linearityof the isotherm). The persistence of sorgoleone in soil and its possible degradationwere 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 verifiedthat sorgoleone is strongly sorbed in the soil and its half-life is 10 days,under the experimental conditions. The presence of sorgoleone or its metaboliteswas not detected in the soil after 60 days.

【 授权许可】

CC BY