Analysis of Major Nutrient Elements and Communities in Rhizosphere Microbial of Castanopsis carlesii

In 2020,the rhizosphere soils of Castanopsis carlesii with different slopes (28°,34°,40°) were studied at the Meilin State Forest Farm in Datian,Sanming,Fujian,to determine the structure of the soil microbial community of C.carlesii rhizosphere soils by using macro-genome sequencing technology and to determine the elemental content of chinkapin rhizosphere soils,and to analyze the correlation between the microbial community of the C.carlesii rhizosphere soils and the content of the elements in the soils.The results showed that there were significant differences (P＜0.05) in the nutrient contents of C,P,Fe,Mg,and Ca in the soil of different slopes of C.carlesii,and there was no significant difference in the contents of N,K,Zn,and Mn;the richness and diversity of the microbial community of the rhizosphere soils of C.carlesii with a slope of 34° were the highest;the dominant phyla of rhizosphere soils were Acidobacteriae,Alphaproteobacteria,and Gammaproteobacteria,the total of dominant phyla in the community accounted for more than 60% of the total microbial community;the organic nitrogen in the soil had a significant effect on the microbial community,and the strongest negative correlation between Blastocatellia and N was observed (r=-0.99988).Different slopes had significant effects on the rhizosphere soils microbial community structure of C.carlesii,but there were still commonalities.The results of this study can provide a reference for the improvement of quality and efficiency of C.carlesii forests.