不同林地和郁闭度对香榧幼苗影响分析

摘要

Observations were made on survival rate and new shoot growth of Torreya grandis cv. Merrillii seedlings under different closure and upper layers from 2006-2009 in Songyang, aejiang province. Factorial analysis on data of 52 sample plots resulted that closure, forest type, interaction of closure and forest type had great significance on seedling survival rate, and closure had evident effect on new shoot growth., canopy density and their interaction, and the shoot growth capacity was only significant differences with canopy density. The survival rate and new shoot growth of seedling could reach 96% and 21 5cm under Castanea mollissima forest, mixed conifer-broad leaf forest and Cummghaimia lanceolata forest with closure of 0.4.%为比较不同林地类型和郁闭度对香榧幼苗的影响,2006-2009年连续观察松阳县52块标准地香榧幼苗的成活率和新梢生长量,析因分析结果表明,郁闭度、林地类型、郁闭度和林地交互作用对成活率均有极显著性影响,郁闭度对新梢生长量有显著影响.在郁闭度为0.4的板栗林、针阔混交林和杉木林种植香榧幼苗,其成活率可达96％以上,新梢生长量21.5 cm以上.