福建林业科技
福建林業科技
복건임업과기
Journal of Fujian Forestry Science and Technology
2015年
3期
13-17,44
,共6页
王良衍%季德成%赵绮%严春风%姚崇巍
王良衍%季德成%趙綺%嚴春風%姚崇巍
왕량연%계덕성%조기%엄춘풍%요숭외
木荷%里白%种群动态%种群结构%分化等级
木荷%裏白%種群動態%種群結構%分化等級
목하%리백%충군동태%충군결구%분화등급
Schima superba%Diplopterygium glaucum%population dynamics%population structure%level of differentiation
根据浙江天童次生木荷林抚育42 a的永久样地1972年、1983年和2014年3次调查数据,分析木荷林中主要树种的种群动态。结果显示:木荷林抚育后随着林龄增加样地内胸径≥5 cm的成树密度在3次调查中呈逐年递减趋势,而林分胸径断面积和蓄积量呈逐年增加趋势。林分蓄积年生长率为2.4%。林分优势种为木荷、栲树和石栎种群,优势度明显;且木荷、栲树种群结构为单峰曲线,石栎、浙江新木姜子等为逆“J”型,更新层中里白独占优势。在3次调查中,木荷林的1~5级木分化等级范围由1972年的3级扩展成2014年的5级,分化明显。其经营策略可采用近自然林经营技术,将里白连续割除2 a,开展森林综合抚育;培育目标树结实更新;清理枯立木、风倒木和干扰木;在“林窗”中少量补植地带性顶级阔叶树种。
根據浙江天童次生木荷林撫育42 a的永久樣地1972年、1983年和2014年3次調查數據,分析木荷林中主要樹種的種群動態。結果顯示:木荷林撫育後隨著林齡增加樣地內胸徑≥5 cm的成樹密度在3次調查中呈逐年遞減趨勢,而林分胸徑斷麵積和蓄積量呈逐年增加趨勢。林分蓄積年生長率為2.4%。林分優勢種為木荷、栲樹和石櫟種群,優勢度明顯;且木荷、栲樹種群結構為單峰麯線,石櫟、浙江新木薑子等為逆“J”型,更新層中裏白獨佔優勢。在3次調查中,木荷林的1~5級木分化等級範圍由1972年的3級擴展成2014年的5級,分化明顯。其經營策略可採用近自然林經營技術,將裏白連續割除2 a,開展森林綜閤撫育;培育目標樹結實更新;清理枯立木、風倒木和榦擾木;在“林窗”中少量補植地帶性頂級闊葉樹種。
근거절강천동차생목하림무육42 a적영구양지1972년、1983년화2014년3차조사수거,분석목하림중주요수충적충군동태。결과현시:목하림무육후수착림령증가양지내흉경≥5 cm적성수밀도재3차조사중정축년체감추세,이림분흉경단면적화축적량정축년증가추세。림분축적년생장솔위2.4%。림분우세충위목하、고수화석력충군,우세도명현;차목하、고수충군결구위단봉곡선,석력、절강신목강자등위역“J”형,경신층중리백독점우세。재3차조사중,목하림적1~5급목분화등급범위유1972년적3급확전성2014년적5급,분화명현。기경영책략가채용근자연림경영기술,장리백련속할제2 a,개전삼림종합무육;배육목표수결실경신;청리고립목、풍도목화간우목;재“림창”중소량보식지대성정급활협수충。
The 42 years′secondary Schima superba forest in Tiantong National Forest Park was analyzed.Our results showed that af-ter management,density of adult trees (diameter at breast height≥5 cm) of the community was monotonic declining in 1972,1983 and 2014.However,total DBH area and growing stock were monotonic increasing in the three survey years.Growing stock accumula-tion rate was 2.4% per year.Dominant tree species of the community were Schima superba, Castanopsis fargesii and Lithocarpus glaber;population structures were unimodal type for Schima superba,Castanopsis fargesii and reverse″J″type for Lithocarpus glaber, Neolitsea aurata.Diplopterygium glaucum was absolutely dominated in the regeneration layer of the community.During the 3 surveys, size classes of Schima superba expanded from 3 classes to 5 classes Based on these results,management strategies of the community were suggested to follow the near natural-forest technology after clear cut the Diplopterygium glaucum in the first two years with other comprehensive forest managements.Other suggested managements includes selecting well-growing steadings as target trees,cleaning dead trees and competing trees,and replanting a few typical local broad-leaved species in forest gaps.