Nutrients and microorganisms in soil of Houttuynia cordata

Nutrients，microorganisms in rhizosphere and no-rhizosphere soils of Houttuynia cordata were investigated to understand the characteristics of H. cordata soil and to improve the quality of cultivated H. cordata. The results showed that the rhizosphere and no-rhizosphere soils at different sample sites varied greatly in nutrients，pH，enzyme activity，microbial biomass C and N，phospholipid fatty acids（PLFAs） and population of microbes. pH in the soil of H. cordata rhizosphere was obviously lower than that in the nonrhizosphere soil，but contents of organic matter，alkalystic N，available P，readily available K，activities of catalase，phosphate，urease，polyphenol oxidease and sucrase，microbial C and N，contents of FLFAs， and indexes of diversity and homogeneity of microbial colonies were just the otherwise. Total FLFAs of microorganisms were significantly and positively related to alkalystic N，available P，organic matter，urease， polyphenol oxidease and sucrase，microbial biomass C was significantly and positively related to available P and sucrase，respectively. And microbial biomass N was significantly and positively related to available P，alkalystic N，organic matter and polyphenol oxidease，respectively. There was some evidence that H. cordata was highly adaptable to a variety of habitats，that it was suitable for growth of various species of microorganisms，increasing enzyme activities， promoting transformation of soil microorganisms and enzymes to organic matter，N and P in rhizosphere soil of H. cordata，and improving effectiveness of the soil nutrient and physical and chemical properties of soil，which was beneficial to the H. cordata adapting to different soil conditions.