Abstract: In order to promote the industrial development of cassava（Manihot esculenta Cran） in Guizhou Province, we selected some appropriate varieties in Guizhou,such as GR3,GR11 and SC5,and then carried out high-yield cultivation experiment of cassava in mountainous region of Guizhou. The study about five factors（cultivars,density,nitrogen fertilizer,calcium/magnesium/phosphorus fertilizer and potassium sulphate fertilizer） at four levels was done by orthogonal experiment.The results showed,the major factors which contribute to yield of cassava were density,cultivar and levels of nitrogen fertilizer,and the yield of GR3 which treated with density of 12 000 plants/hm²,nitrogen fertilizer of 900 kg/hm²,calcium/magnesium/phosphorus fertilizer of 900 kg/hm² and potassium sulphate fertilizer of 900 kg/hm² ranked the top amount all treatments. The main factor affcted the starch content of cassava was cultivar,and the starch content of GR911 treated with density of 18 000 plants/hm²,nitrogen fertilizer of 0 kg/hm²,calcium/magnesium/phosphorus fertilizer of 450 kg/hm² and potassium sulphate fertilizer of 600 kg/hm² ranked the top amount all treatments. Overall,considering about both yield and starch content, we proposed that the best cultivation treatment was nitrogen fertilizer of 600 kg/hm²,calcium/magnesium/phosphorus fertilizer of 450 to 900 kg/hm² and potassium sulphate fertilizer of 600 kg/hm².

Key words: cassava（Manihot esculenta Cran）, cultivar, yield, starch content, cultivation technology, Guizhou province