华北落叶松人工林林隙大小对其更新的影响  

Effect of gap size on the regeneration in Larix principis-rupprechtii plantation

作　　者：赵怡 李福明 朱景康 常晨隆 冯泳翰 梁文俊[1] 魏曦 ZHAO Yi;LI Fuming;ZHU Jingkang;CHANG Chenlong;FENG Yonghan;LIANG Wenjun;WEI Xi(College of Forestry,Shanxi Agricultural University,Jinzhong 030801,Shanxi,China)

机构地区：[1]山西农业大学林学院,山西晋中030801

出　　处：《应用生态学报》2023年第8期2039-2046,共8页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(31971644,31901365);国家重点研发计划项目(2022YFF1300401);山西省高等学校科技创新项目(2021L105);山西省优秀博士来晋工作奖励资金科研项目(SXYBKY2018032);山西农业大学科技创新基金项目(2018YJ09)资助。

摘　　要：对关帝山华北落叶松人工林20个林隙的幼苗(高度<1 m)、幼树(高度≥1 m,胸径<5 cm)进行调查,分析4个面积林隙等级(<60 m^(2)、60~120 m^(2)、120~180 m^(2)、≥180 m^(2))下华北落叶松幼苗和幼树的更新密度、生长指标和空间分布。结果表明:在不同面积的林隙等级中,幼苗、幼树的生长指标(基径、高度)和幼苗更新密度均在小林隙(14~60 m^(2))下最好,幼树更新密度在中林隙(60~120 m^(2))下最大,且同等级面积林隙下幼树密度均大于幼苗密度。华北落叶松幼苗、幼树在小林隙和中林隙下更新状况良好,大林隙(120~180 m^(2))和特大林隙(≥180 m^(2))则不利于华北落叶松更新。华北落叶松幼苗、幼树主要分布在林冠投影区域以及林冠空隙区域的边缘。通过补种或间伐等人工干扰手段将林隙面积控制在14~120 m^(2),可以促进华北落叶松的更新。We conducted a survey on seedlings(height<1 m)and saplings(height≥1 m,diameter at breast height<5 cm)in 20 gaps of Larix principis-rupprechtii plantations on Guandi Mountains,Shanxi to analyze regene-ration density,growth indicators,and spatial distribution of L.principis-rupprechtii seedlings and saplings under four gap sizes(<60 m^(2),60-120 m^(2),120-180 m^(2),and≥180 m^(2)).The results showed that growth indicators(ground diameter,height)of seedlings and saplings and regeneration density of seedlings were highest in small gaps(14-60 m^(2)).The sapling regeneration density was highest in medium gaps(60-120 m^(2)),and sapling density exceeded seedling density in each size category.L.principis-rupprechtii seedlings and saplings exhibited favorable regeneration in small and medium gaps,while large gaps(120-180 m^(2))and extra-large gaps(≥180 m^(2))were unfavorable for L.principis-rupprechtii regeneration.L.principis-rupprechtii seedlings and saplings were mainly distributed within the canopy projection area and along the edge of canopy gap area.Controlling gap size within the range of 14-120 m^(2)through artificial interventions,such as planting and thinning,could promote the regeneration of L.principis-rupprechtii.

关 键 词：核密度估计 空间结构 林隙 华北落叶松更新 

分 类 号：S791.22[农业科学—林木遗传育种]