Growth Characteristics of the Schima superba Plantation of Different Forest Site Quality Grades

The average stem analysis method was used to analyze the growth characteristics and quantitative maturity age of the 45 a Schima superba plantations of 4 kinds of site quality grades.Results showed that:the average individual tree mean annual increment of the 45 a S.superba plantations of four site classes was in the order of Class Ⅰ>Class Ⅱ＞Class Ⅲ＞Class Ⅳ,but the peak age was advanced with the decline of the forest class.The quantitative mature age of the planted forest in Class Ⅰ and Ⅱ land was more than 45 years,while that of Class Ⅲ and Ⅳ land was about 40 years and 35 years,respectively.The results of the study can provide a theoretical basis for the development of efficient management measures for S.superba plantation according to site grade.