文献类型：期刊文献

中文题名：木荷林窗微环境特征及幼苗更新研究

英文题名：Microenvironment Characteristics and Dynamic Regeneration of Seedlings in Schima superba Forest Gaps

作者：刘海英[1] 蒋仲龙[1] 姚任图[1] 孙碧霞[2] 王刚[2] 葛晓改[2] 李正才[2] 王增[1] 周本智[2]

第一作者：刘海英

机构：[1]浙江省公益林和国有林场管理总站,浙江杭州310020;[2]国家林草局钱江源森林生态系统定位观测研究站,中国林业科学研究院亚热带林业研究所,浙江杭州311400

年份：2022

卷号：42

期号：5

起止页码：56-63

中文期刊名：西南林业大学学报：自然科学

外文期刊名：Journal of Southwest Forestry University:Natural Sciences

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：浙江省省院合作林业科技项目(2020SY06)资助;浙江省公益林和国有林场管理总站委托项目(GYLZ?202104)资助。

语种：中文

中文关键词：林窗;木荷;小气候;更新

外文关键词：forest gap;Schima superba;microclimate;regeneration

分类号：S718.5

摘要：以浙江省江山市江郎山木荷林为研究对象,通过在自然干扰后形成的小、中、大林窗和非林窗内设立调查样地,分析木荷林窗小气候特征、土壤性质和幼苗更新的差异。结果表明:光照强度随林窗大小的增加而显著增加,而湿度则相反;温度越低,相对湿度越大。木荷更新密度在中等林窗中最大,在非林窗中最低。中等林窗更新密度密度分别比小林窗、大林窗和非林窗高41.20%、57.15%和49.66%;中等大小林窗的木荷幼苗、幼树高生长和粗生长均比在小林窗和大林窗中的好,表明中等林窗为幼苗生长提供了适宜的湿度和光照强度。土壤全氮和水解氮影响着幼苗高度和幼苗基径,而幼苗高度和基径受全磷和速效磷的调控。光照和温度对幼苗高度小于50 cm以下幼苗的影响强于相对湿度和土壤养分的。对于幼苗高度在50~100 cm的幼苗,土壤有机质和相对湿度的影响最大,而幼苗高度大于100 cm的幼苗主要受土壤养分的调控,说明林窗大小形成了资源利用和竞争力的差异。从生态系统角度看,林窗大小对C、N、P循环的影响与更新密度相关,并且中等林窗可能是最优的林窗。
Forest gaps of small,medium and large gaps were selected to examine their impacts on microclimate,soil properties and seedling regeneration in Schima superba stand on Jianglang Mountain,Jiangshan City,Zhejiang Province.The results shows illumination intensity were significantly increased with the rise of gap size,whereas moisture showed the opposite trend;the lower the temperature,the greater the relative humidity.The regeneration density of S.superba was maximum in medium forest gaps and lowest in non-forest gaps.The density of medium forest gaps was 41.20%,57.15%and 49.66%higher than small,large and non-forest gaps;the seedling height,sapling diameter and sapling height in medium forest gaps were higher than those in small and large forest gaps,suggesting suitable environmental conditions of the balance of humidity and illumination intensity for seedling growth in the medium forest gaps.Seedling height and seedling basal diameter were influenced by soil total N and hydrolyzable N,while saplings height and basal diameter were regulated by total P and available P.The influence of illumination and air temperature on seedlings with height<50 cm was stronger than that of relative humidity and soil nutrients.Seedlings between 50 and 100 cm in height,soil organic matter and relative humidity had the strongest influence.Saplings with height>100 cm were governed by soil nutrients,suggesting differences in resource utilization and competitiveness caused by the forest gap size.The effect of gap size on C,N and P cycles was correlated with regeneration density,indicating that the medium gap may be optimal from an ecosystem perspective.