Experiments on the effect of soil amendment with rape ( Brassica chinensis L.) seed cake, cotton(Gossypium hirsutum L.) seed or sesame(Sesamum indicum L.) seed cake on the growth of cucumber seedlings und er continuous cropping system in greenhouse were conducted. The results indicate d that two applications of sesame seed cake ( 0.1 %, 0.5 %, w/w) increased the gro wth of cucumber but the rape oil cake showed a negative effect at the rate of 1.5 %(w/w). The sesame seed cake was separated and obtained...