计划烧除对西双版纳保护区思茅松林的影响

摘要

Effects monitoring of prescribed burning on Simao pine forest was carried out in Xishuangban-na Nature Reserve, results showed that prescribed burning would not have a significant impact on arbor -ous layer species, but the impact was greater on shrub layer and herb layer .In the prescribed burning process, most plants of shrub and herb layers were burned , but the burning herbs has been largely re-ger-mination after three months, 1a burning basically reached to the level of before .Dead plants of the shrub have been re-sprout new plants after six months.Prescribed burning on Simao pine forest would not cause long-term effects, and especially after burning, canopy density was decreased, which was condu-cive to the growth of understory plants and outside plants , also may increase the species diversity , but the profusion of plants may affect the growth of plants .%对西双版纳自然保护区内思茅松林进行计划烧除的影响情况监测。分析认为，计划烧除对思茅松林的乔木层树种不会产生明显影响，影响较大的是灌木层和草本层植物。在计划烧除过程中，灌木层和草本层植物大部分被烧死，但草本植物在烧除后3个月内已大部分重新萌发，1 a后基本达到了烧除前的水平，6个月后灌木树种已基本从死亡植株的基部重新萌发出新的植株。计划烧除对思茅松林不会造成长期的影响，同时由于烧除后郁闭度减小，有利于林下植物的生长和外部植物的进入，可适当增加物种多样性，但丛生的植株对植物的生长有一定的影响。