STUDY ON SITE CLASSIFICATION AND SITE QUALITY EVALUATION OF THE PLANTATION OF CUNNINGHAMIA LANCEOLATA IN NIANZHU FOREST FARM

The purpose of this sutdy was to classify site types and evaluate the site quality of the plantation of Cunninghamia lanceolata in Nianzhu Forest Farm, Fenyi County, Jiangxi Province, by stand growth and other site factors, especially edaphic factors. Multiple regression analysis was used to study the relationships between site index and site factors. The results showed that the main site factors were slope position and the depth of humus horizon.Ⅱ site types were classified in accord with the two factors, and the forecasted equation of site index was derived to predict stand productivity of C. lanceolata. The paper also preliminarily studied the relationships between site index and foliar nutrient of C. lanceolata. The results proved that site index was correlated positively with foliar nutrient of P%, N%, Ca%.