[Objective]The differences in soil nutrient status and enzyme activity among 3 species of rare trees in Guangxi were analyzed,in order to provide theoretical basis for development and utilization of local rare fast-growing tree species.[Method]Taking 12-year-old pure plantations of Mytilaria laosensis,Castanpsis hystrix and Castanopsisfissa as research objects,the soil nutrient content and enzyme activity in the three plantations were determined and analyzed.[Result]Three plantations were rich in soil organic matter,and the content of organic matter was 31.94-52.99 g/kg.The contents of total potassium,total nitrogen,total phosphorus and available nutrient were in between medium level and very lacking level.C.fissa plantation had the highest soil nutrient contents,followed by C.hystrix plantation,and then M.laosensis plantation.M.laosensis plantation had the highest soil enzyme activity,followed by C.fissa plantation,and then C.hystrix plantation.The enzymes in soil were ranked according to their activities,as follows:invertase ＞ catalase ＞ protease ＞ urease.Correlation analysis showed that there were significantly positive correlations between catalase activity and hydrolyzable nitrogen content,between invertase activity and available phosphorus content,and between protease activity and total phosphorus content (P＜0.05).[Conclusion]The soil nutrient status of C.fissa plantation is the best,the growth of C.fissa is beneficial to improve soil,recover land productivity fertility,prevent soil degradation and maintain soil fertility.Therefore C.fissa can be mixed with other needle-leaved tree and broad-leaved tree species,so as to transform lowefficiency forest.
国家科技期刊平台
NSTL
维普
万方数据
