基于树干解析的杉木与木荷混交成效分析  

Study on the Mixed Effect of Cunninghamia lan ceolata and Schima superba Based on Trunk Analysis

作　　者：林胜 LIN Sheng(Youxi State Owned Forest Farm of Fujian Province,Youxi 365100,Fujian,China)

机构地区：[1]福建省尤溪国有林场,福建尤溪365100

出　　处：《福建林业科技》2023年第3期32-37,共6页Journal of Fujian Forestry Science and Technology

基　　金：福建省三明市林业科学研究项目(杉木与木荷混交林间伐技术研究,2019N02)。

摘　　要：于2019年,在福建省尤溪县对杉木与木荷混交林及杉木纯林,采用林木定位(林木坐标点计算)、解析木剖析(圆盘正北方向标注)等新方法,精准拟合解析木在动态的林分环境与立地条件中所表现的生长特点,探讨杉木、木荷的生物学特性与混交成效。结果表明:杉木对立地条件要求高,树冠透光性高于木荷;木荷生长潜力大,但在光照充足环境中,表现出灌木的生长特点(以多萌芽(幼年)或增加、增粗枝条、扩大冠幅等空间发展生长为主),当光照不足时,则把更多营养用于主干生长,适度的遮荫让木荷生长更有活力;杉木与木荷混交,能提早促进木荷的主干生长,同时也能促进杉木生长,但当杉木被木荷遮挡到一定程度后,生长不良,杉木与木荷的混交比例在3∶1优于1∶1。试验以解析木为切入点,揭示杉木、木荷的树种特性及其组成林分的演变规律,拓宽了解析木应用范围,为研究并制定不同类型林分的经营措施提供了新途径。In 2019,in Youxi County,Fujian Province,new methods such as forest positioning(calculating coordinates of trees),analytical wood analysis(marking in due north direction of the disk)were used to accurately fit the growth characteristics of analytic trees in dynamic forest environments and site conditions,and to explore the biological characteristics and mixed effects of Cunninghamia lanceolata and Schima superba.The results show that Cunninghamia lanceolata has high requirements for site conditions;the light transmittance of Cunninghamia lanceolata crown is higher than that of Schima superba;Schima superba has great growth potential,but In a well lit environment,it exhibits the growth characteristics of shrubs(mainly through the development of more sprouts(young)or the addition,thickening of branches,and expansion of crown width),when the light is insufficient,more nutrients are used for trunk growth,and moderate shading makes Schima superba grow more vigorously;mixed Cunninghamia lanceolata can promote the trunk growth of Schima superba in advance;mixed Schima superba can promote the growth of Cunninghamia lanceolata,but when it is sheltered by Schima superba to a certain extent,the growth of Cunninghamia lanceolata is poor,and the mixture ratio of Cunninghamia lanceolata and Schima superba is 3∶1 better than 1∶1.The experiment takes analytical wood as the starting point to reveal the characteristics of Cunninghamia lanceolata and Schima superba tree species and the evolution laws of their constituent stands,expanding the application scope of analytical wood and providing a new approach for studying and formulating management measures for different types of forests.

关 键 词：林木坐标点计算 解析木 正北方向确定 生物学特性 混交成效 

分 类 号：S725.2[农业科学—林木遗传育种]