杉木大径材-闽楠复层林经营对林分生长和材种结构的影响
Effects of management of large diameter wood of Chinese fir and multilayer forest of fuchsia on stand growth and seed structure
通过研究杉木大径材-闽楠复层林经营对杉木林林分生长的影响与大径材的培育效果,为实现大径材高效培育提供科学依据。本研究以24年生杉木林为研究对象,采用完全随机区组设计方法,本研究以福建省邵武卫闽国有林场27年生杉木人工林为研究,进行不同间伐保留密度下杉木大径材-闽楠复层林研究,设置套种闽楠,杉木保留密度40 株/亩与套种闽楠,杉木保留密度60 株/亩两种间伐保留密度,同时以不间伐不套种措施作为对照。通过在杉木纯林择伐林地开展林下闽楠珍贵树种的种植,优化了林分结构和功能,构建更加健康、稳定、优质、高效的复层林,既有利于杉木大径材培育,又拓展了珍贵树种的发展空间,为缓解杉木连栽地力衰退、推广杉木复层次经营模式、培育杉木大径材提供科学依据。结果表明:杉木大径材-闽楠复层林经营的中低保留密度均能提高林分平均生长量,且能显著提高林分的中间收益,径级分布均呈现正态分布,大径级株数占比高于对照和高保留密度模式,且中低保留密度径级分布最为集中。通过材种结构分析表明,杉木大径材-闽楠复层林低密度经营能显著提高林分大径材的出材量与出材率,林分总出材量也大于对照和高保留密度林分。综上所述,杉木大径材-闽楠复层林低密度经营能促进林分的生长,且较有利杉木大径材的生长,但两者差异并不显著。
Through the study of the effect of the management of large diameter of Chinese fir and the multi-layer forest of Fujian nan on the stand growth of Chinese fir and the cultivation effect of large diameter of Chinese fir,to provide a scientific basis for the efficient cultivation of large diameter of Chinese fir.This study Chinese fir forests in 24 years as the research object,USES the completely randomized block design method,this study Shao Wuwei fujian state-owned forest farm of fujian province 27 years of Chinese fir plantation,for research of Chinese fir big diameter under different thinning reserve density material-fujian nan stand of research,set up the fujian nan interplanting,density of Chinese fir reserved 40 plants/mu and li min nan,Retaining density of Chinese fir was 60 plants/mu,and the measures of no thinning and no interplanting were taken as the control.Through the undergrowth in the forest of cunninghamia lanceolata selective min nan precious tree planting,optimized the forest structure and function,build more healthy,stable and high quality,efficient,stand of both fir big diameter wood cultivation,and expand the development space of the precious tree species,to ease to fir the soil fertility decline,the promotion of Chinese fir complex hierarchical management model,provide a scientific basis for cultivating cunninghamia lanceolata big diameter wood.The results showed that the middle and low retention densities of the large-diameter Chinese fir and the multi-layer forest of Fujian and Nan could both increase the average growth of the stand and significantly improve the middle income of the stand.The diameter class distribution presented normal distribution,and the proportion of trees in the large-diameter class was higher than that in the control and the high-retention density model,and the diameter class distribution of the middle and low retention densities was the most concentrated.The analysis of timber species structure showed that low density management could significantly increase the timber yield and timber yield of large diameter stand,and the total timber yield of stand was also higher than that of control stand and high retention density stand.In conclusion,low-density management of Chinese fir large diameter forest and Fujian Nan complex forest can promote the growth of stand,and is more favorable to the growth of Chinese fir large diameter forest,but the difference between the two is not significant.
侯政杰;邹显花;刘爱琴;
Cunninghamia lanceolata Undergrowth interplanting Large diameter timber cultivation Material structure.
1056-1064 / 9
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