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| Đường cong chỉ số địa điểm× | Chỉ số mật độ lâm phần× | |
|---|---|---|
| Lĩnh vực | Lâm nghiệp | Lâm nghiệp |
| Họ | Process / pipeline | Process / pipeline |
| Năm ra đời≠ | 1954 | 1933 |
| Người khởi xướng≠ | Joseph Westveld | Louis Reineke |
| Loại≠ | productivity index | density measurement |
| Công trình gốc≠ | Clutter, J. L., Fortson, J. C., Pienaar, L. V., Brister, G. H., & Bailey, R. L. (1983). Timber Management: A Quantitative Approach. John Wiley & Sons. link ↗ | Reineke, L. H. (1933). Perfecting a stand-density index for even-aged forests. Journal of Agricultural Research, 46(7), 627–638. link ↗ |
| Tên gọi khác | site productivity, growth intercept | SDI, Reineke density index |
| Liên quan≠ | 1 | 2 |
| Tóm tắt≠ | A site index curve is a family of curves relating tree height to stand age, used to quantify the productivity of a forest site. Site index is conventionally defined as the height of dominant trees at a reference age (typically 50 years in temperate forests). These curves enable foresters to classify sites by productivity class and to predict growth rates for planning timber harvests and silvicultural treatments. Site index curves are among the most fundamental tools in forest growth and yield modeling. | The Stand Density Index (SDI), introduced by Reineke in 1933, is a dimensionless measure of forest density that accounts for both tree number and size. It expresses the number of trees per hectare in a stand, adjusted to a reference quadratic mean diameter (QMD) of 25 cm, providing a standardized metric for comparing tree density across different forest types and sizes. SDI is widely used in forest management to assess stocking levels and to guide thinning decisions. |
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