光度與養分對於福山次生樟櫧林苗木生長的影響

Effect of Light Intensity and Nutrient on the Seedling Growth of the Secondary Lauro-Fagaceae Forest at Fu-Shan Area

洪富文(Fu-Wen Horng) ； 程煒兒(Wei-Er Cheng) ； 游漢明(Han-Ming Yu) ； 馬復京(Fu-Ching Ma)

《林業試驗所研究報告季刊》 9卷3期 (1994/09) Pp. 257-265

https://doi.org/10.7075/BTFRI.199409.0257

摘要

我們選擇福山次生樟櫧林內五種樹種（白桕、長尾柯、香楠、台灣黃杞、江某）的苗木，以福山林地表土為介質，進行光度與養分試驗。光度採用二個等級（強光度與弱光度或中光度），養分則為四種（氮肥、磷肥、完全肥料、不施肥）。從6或11個月苗木高生長與基徑生長的資料而言，趨先驅樹種（白桕、長尾柯）將在強光度生長較佳，趨極相樹種（香楠、台灣黃杞、江某）則將在中、強光度生長均佳。而趨先軀樹種對於氮肥反應很強，兩種趨極相樹種（台灣黃杞、江某）則對於當地缺乏的磷肥反應較強。這種現象顯示同一生育地上的不同演替期樹種將對於生存環境或資源演化出不同的適應能力。

關鍵字

次生樟櫧林 ； 光度 ； 養分 ； 苗木生長

並列摘要

Seedlings of five tree species in the secondary Lauro-Fagaceae forest at Fu-Shan area were selected and grew under two light intensities (strong, and weak or intermediate) and four nutrient amendments (N, P, complete fertilizer, and control) in the pots with forest surface soil from Fu-Shan. The five species were Castanopsis carlesii var. sessilis, Engelhardtia roxburghiana, Machilus zuihoensis, Sapium discolor, Schefflera octophylla, Over six or eleven months, the pro-pioneer species (S. discolor, C. carlesii var. sessilis) would grow better under strong light intensity, while pro-climax species CE. roxburghiana, M. zuihoensis, S. octophylla) would grow better under both strong and intermediate light intensities. The pro-pioneer species responsed to N stronger than to P, while two of the three pro-climax species responded to P stronger than to N. Available P in this forest ecosystem is low. Therefore the different response patterns of these two successional tree groups to light intensity and nutrient amendment may indicate their evolved adaptive strategies toward the available resource of this forestecosystem.

並列關鍵字

secondary Lauro-Fagaceae forest ； light intensity ； nutrient ； seedling growth