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頁籤選單縮合
題名 | 石門水庫上天然生檜木保安林天然更新法之研究 |
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作者 | 洪良斌; | 書刊名 | 中華農學會報 |
卷期 | 117 1982.03[民71.03] |
頁次 | 頁49-54 |
分類號 | 436.21 |
關鍵詞 | 天然更新法; 石門水庫; 保安林; 檜木; |
語文 | 中文(Chinese) |
中文摘要 | (1)該處天然生檜木林在擇伐後天然更新之整地工作,緊跟在擇伐作業完畢後實施之為最適宜。在各種整地處理中,以水平帶狀之集約除草整地?鬆土(Scarified)區,所得之天然更新幼苗最為眾多。 (2)當水平帶上天然更新之幼苗陸續出現後,雜草亦同時發生而混什幼苗中間。故應繼續實施集約除草撫育工作,否則幼苗將被什草擁擠為害而無法生長。 (3)天然更新之幼苗發生過多之處所,可於適當季節移植於稀疏之地。將來發育呈現過度擁擠時,可實施前期疏伐,以促進幼林分之快速生長,成為優良之擇伐林。 |
英文摘要 | There are large areas of natural cypress forest used as protection forest in Chih-Lan-Shan Forest District situated on the upper basin of the Shih-men Reservior. An experiment on selective cutting was carried out on this natural forest during the years of 1971-72. Another experiment on natural regeneration was carried out on the same land in 1975-76. The design of the experiment on natural regeneration includes three ground preparation treatments: (A) Intensive weeding on contour lines, or scarified areas; (B) Extensive weeding on contour lines, on unscarified areas; and (C) Control or no treatment after selective cutting. Germination and seedling survival were observed for 3 years on various plots. Data of the natural regeneration were collected and analyzed. The results may be summarized as follows: (1) The ground preparation for natural regeneration after selective cutting must be practised right after the operation of selective cutting is finished. The numbers of seedlinds and the height growth of 3-year-old seedlings by natural regeneration from (A) treatment of ground preparation of intensive weeding on contour lines were the best. Those from (B) treatment of extensive weeding on the contour lines were the next, and those from control (C) plot were the poorest. (2) It is known that the seedlings by natural regeneration were appearing on the contour lines, meanwhile all kinds of grass were also emerging between the seedlings. So, it is necessary to do intensive weeding one or two times a year. Otherwise, all of the seedlings will be choked by grasses and bushes and fail to grow. (3) It is possible that seedlings by natural regeneration are emerging somewhere numerously, and some other places very few. Therefore, the replanting the open places should be taken at the proper time. (4) When the saplings are established too crowded, the pre-commercial thinning should by taken timely in order to promote the normal growth of yound cypress. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。