白藤及益智在加勒比松人工林下的生长适应性研究

在海南省中部丘陵地区的加勒比松林下种植白藤和益智,研究了不同的坡向、坡位以及郁闭度对林下白藤和益智生长发育的影响。结果表明:(1)在东坡和南坡对白藤及益智的生长影响不大,但东坡的益智座果多于南坡;(2)坡上、坡中和坡下3种不同的坡位对白藤和益智的生长发育均有显著影响,种植在坡中的生长最好,其次为坡下,坡上最差;(3)在加勒比松林下种植益智,林木的郁闭度以50%以下为宜;白藤较耐阴,林木郁闭度的大小对其生长影响不大。

Growth Adaptability of the Rattanpalm and Galangal under the Man-made Forest of Pinus caribaea

An attempt was made to study the effect of exposure, slope location and crown density on the growth of rattanpalm (Calamus tetradactylus Hance) and galangal (Alpinia oxyphylla Miquel) under the man-made forest of Pinus caribaea Morelet in the hilly area of the middle Hainan island. The growth of rattanpalm and galangal planted on the eastward slope was found not significantly different from that on the southward slope. However, the galangal produced more fruit on the eastward than on the southward slope. The rattanpalm and galangal grew significantly different on different slope positions, with the best on the lower slope, followed by the middle slope and the upper slope. In this trial, the galangal grew better under the forest crown density of less than 50%. The rattanpalm was tolerant to shade and was not affected obviously by the forest crown density.