【Objective】Residues of paclobutrazol and its degradation dynamics in peanut soil were studied in order to provide references for the rational use of paclobutrazol in peanut cultivation.【Method】Samples were extracted with acetonitrile,and soil was purified by liquid-liquid separation.Peanut samples were purified by Cleanert Florisil and graphitized carbon black,then determined by gas chromatograph with nitrogen phosphorous detector using external standard method.Through residue experiments during two years i...