森林与环境学报Issue(3)：265-271,7.DOI:10.13324/j.cnki.jfcf.2015.03.014
赤水河上游次生林林窗特征及森林更新
Forest gap characteristics and forest regeneration in the upper reaches of Chishui River
摘要
Abstract
In order to make clear the effects of gap size on seedling growth in forest, 23 artificial forest gaps in the upper reaches of Chishui River were chosen as the samples to investigate the effects of gap size, light intensity, soil chemical properties on the forest regeneration.The results showed that the gap sizes in these stands were mainly small and medium, and the light intensity followed the order of gaps >forest edge >forest.The light intensity in gaps was insignificantly correlated with forest gap size and average DBH of edge trees, while following an exponential function with the average height of edge trees, where the light intensity decreased with the increasing of average height.Soil nutrients were high in the area of forest gaps between 80 m2 and 160 m2 , and low in the area of forest gaps less than 80 m2 .Comprehensive environment indexes were relatively high in the range between 80 m2 and 160 m2 and the gaps larger than 240 m2 , while low in the range between 161 m2 and 240 m2 and the gaps smaller than 80 m2 .The seedlings of dominant plants in gaps occurred with the highest frequency. Comprehensive analysis showed the forest might be better regenerated in the gap size between 80 m2 and 160 m2 , and the least favorable for forest regeneration was in the gao size smaller than 80 m2 .It was suggested that suitable gap size should be formed in the forest management for natural regeneration.关键词
次生林/林窗/空间特征/微环境特征/森林更新/赤水河上游Key words
secondary forest/forest gap/spatial feature/microenvironment feature/forest regeneration/the upper reaches of Chishui River分类
农业科技引用本文复制引用
喻阳华,李飒,严令斌,喻理飞,黄宗胜..赤水河上游次生林林窗特征及森林更新[J].森林与环境学报,2015,(3):265-271,7.基金项目
贵州茅台科技联合基金项目“退化植被生态功能评价及生态修复技术与示范研究”（黔科合茅科联字［2009］7007）；贵州省环境保护厅项目“赤水河上游退化植被水源涵养功能评价及恢复对策”（2013－09）；贵州大学人才引进项目［贵大人基合字（2013）02］。 （）
