Abstract：Taking ginger（Zingiber officinale Rosc.）as experiment material，this paper analyzed the effects of different fertilizers combined application on ginger root system and rhizosphere soil enzyme activities and micro-organism quantity．The results show that the biological organic fertilizer can improve the fresh weight of ginger root and strengthen the root activity．The fresh weight of ginger root was higher than that applying common chemical fertilizer or common organic fertilizer by 28.3% and 16.4%，and the root activities were increased by 41.2% and 20.6%．The biological organic fertilizer can increase the soil organic matter．The max value of soil organic matter is achieved during vigorous stage. The contents were higher than that applying common chemical fertilizer and common organic fertilizer by 45.4% and 11.1%，respectively．This fertilizer could significantly improve soil microbe quantity．Compared with that applying common chemical fertilizer，the population of bacteria increased by 449.1%，that of fungi increased by 374.3%，that of actinomycetes increased by 489.8%，and the total population of these 3 kinds of microorganism was increased by 451.5%．Its increased quantity was higher than that applying common organic fertilizer．The activities of invertase，urease and catalase in soil were increased obviously by applying biological organic fertilizer．Thus the decomposition and transformation of soil organic matter was promoted.
