Qizhuan 39 was a genetically modified strain of rice stemming from an indica rice cultivar,Qisiruanzhan,by accepting 2 anti-fungus genes,"RC24"(a rice chinase gene)and "β-1,3-Glu"(a alfalfaβ-1,3-Glucanase gene).Preliminary analysis showed that there were fewer endophytic bacteria and endophytic fungi in the roots of Qizhuan 39.The numbers of bacteria and fungi in the rhizosphere of Qizhuan 39 were markedly lower than of Qisiruanzhan,but near to those of Zhuxian B(another non transgenic control).In the earing period,there was no remarkable difference in the rhizospheric soil between Qizhuan 39 and the controls in concentration of soluble organic matter,nitrogen,phosphorus,and the activities of polyphenol oxidase,hydrogen peroxidase,sucrase and urease.The amount of humic acid in the soil during the rotting process of transgenic rice residue was the same as in the non-transgenic control.There was no remarkable detrimental effect on growth of rice in next season after growing Qizhuan 39.