Sorção e persistência da sorgoleona em um Latossolo Vermelho-Amarelo

Química Nova

Antonio J. Demuner²  Luiz C. A. Barbosa²  Luiz S. Chinelatto Jr.²  César Reis²  Antonio A. Silva¹ 

[1] ,Universidade Federal de Viçosa Departamento de Química Viçosa MG

关键词: allelopathy;    sorghum;    sorption isotherm;   

DOI  :  10.1590/S0100-40422005000300016

来源: SciELO

【 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】

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