Abstract: The effects of two kinds of biological-bacterial fertilizer on the growth, yield and quality of sweet potato E6 were studied in Zhijiang, Ezhou and Xianning. The results showed that the content of nitrogen, phosphorus and potassium in the treated soil was higher than that in the control soil. The application of biological-bacterial fertilizer had no obvious promoting effect on the late yield formation of sweet potato E6, but it could significantly reduce the incidence of field diseases, especially the effect of solid bacterial fertilizer was more obvious. Sweet potato E6 had the highest yield in Zhijiang, followed by Ezhou and Xianning. In quality, Zhijiang was the best, Xianning and Ezhou were the second. The differences among the three locations were mainly due to the soil nutrient status and the influence of climate and environment. Higher potassium content and lower nitrogen content were conducive to the formation of yield.

Key words: sweet potato, biological-bacterial fertilizer, growth, yield, quality