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Construction of Site Index Chart of Robinia pseudoacacia Plantation in Liaoning Province

Liu Caifu, Li Li(Liaoning Academy of Forestry, Shenyang 110032, P R China); Liang Yutang, Zhang Bingqian(Shan-dong Agricultral University)  
In this paper, 159 dominant stem-analysis data of Robinia pseudoacacia were used to construct single-form and polyform site index charts, Richards function was taken for dominant height growth model of Robinia pseudoacacia in Liaoning province On the basis of analysing the characteristics of dominant height growth, 5 index classes were divided out within 5~15 m (standard age was 12 years and site index class distance was 2 m), and single-form site index chart was constructed after derived curve was expanded by difference method The optimum polyform site index model was fitted by means of the adjusted stem-analysis data and the problem that site index curve did not pass the index point was solved, polyform site index chart was constructed The examination results indicated that the accuracy of single-form and polyform site index charts were both high; however, the accuracy of polyform site index chart was higher than that of single-form and the chart was more practical, it showed that dominant height growth was polyformed
【CateGory Index】: S792.260.6,S758.57
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