Microbial diversity in continuously planted Chinese fir soil
杉木连栽土壤微生物多样性的比较研究

The study on the microbial diversity of 1st,2nd,3rd and 4th generation Chinese fir soil at Huitong Forest Experimental Station showed that with the increase of generation,the numbers of bacteria and actinomyces decreased markedly,while that of fungi increased evidently.It was found by PCR and DGGE that the bacterial diversity changed slightly and its genetic similarity among different generations reached 87%,but the fungal diversity reduced and its genetic similarity was only 45%.The numbers of pathogenic and deleterious fungi increased markedly with increasing Chinese fir generations.