引言近年来,由于对在热带低海拔地区营造速生用材树种的兴趣更大的缘故,很多国家都在试种石梓。不过只有少数国家进行过长期的和大面积的试种以确定其生产潜力和局限性。1962年斯特里曾经详细地阐述过尼日利亚和塞拉勒窝内营造石梓商品材人工林的经验。处于亚热带气候条件的罗德西亚和赞比亚不能像马拉维和马来亚那样可望石梓成为重要树种。近来对石梓的木材和纸浆进行了详尽的试验,发现该树种有很多有价值的特性,从而引起大面积造林的兴趣。此外,热衷于该树种的原因还在于其早期生长迅速,易于造林,造林成本低而投资回收较早。其缺点在于幼树易死亡,树干较小,七年生后生长速度减慢。在开阔地生长的石梓其 INTRODUCTION In recent years, many countries are experimenting with Shi Zi because of their growing interest in creating quick-growing timber species at tropical low altitudes. However, only a few countries have conducted long and extensive trials to determine their potential and limitations. In 1962, Stérie elaborated on the experience of creating Shizi commercial plantations in Niger and Sierra Leone. Rhodesia and Zambia in subtropical climates can not expect ShiZi to become an important species, as Malawi and Malaya do. A recent test of Shizi’s wood and pulp has revealed that the tree species has many valuable properties that have led to an interest in large-scale afforestation. In addition, keen on the tree species is also due to its early rapid growth, easy afforestation, afforestation costs low and investment recovery earlier. The disadvantage is that sapling is easy to die, the trunk is small, slow growth after seven years of life. Stone in the open growth of its Azalea