頁籤選單縮合
題 名 | 柳杉人工林林分密度管理之研究 |
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作 者 | 楊榮啟; 黃清泉; | 書刊名 | 中華農學會報 |
卷 期 | 80 1972.12[民61.12] |
頁 次 | 頁42-51 |
關鍵詞 | 人工林; 林分密度; 柳杉; |
語 文 | 中文(Chinese) |
英文摘要 | In this paper, the theory and practice of stand density control in Cryptomeria plantations were studied under the ecological basis. The competition-density effect and the yield-density effect for herbaceous plants have been recognized to be applicable also to the woody plants. A stand density control diagram was developed by using the data of permanent sample plots with five different spacings which were estiablished in the Experimental Forest of National Taiwan University. It contains the equivalent height curves, the equivalent diameter at breast height curves, the natural thinning curves and a full density curve. This diagram may be used as a guide to the determination of optimum initial planting density and thinning schedule. It is suggested that the stand density control diagrams of other important planting species in Taiwan should be prepared in the near future. |
本系統中英文摘要資訊取自各篇刊載內容。