不同改造方式对马尾松林下植被多样性的影响  

Effects of Different Transformation Modes on Understory Vegetation Diversityof Pinus massoniana Forest

作　　者：朱洪如 ZHU Hongru(Fujian Forest Investigation and Planning institute,Fuzhou 350003,Fujian,China)

机构地区：[1]福建省林业调查规划院,福建福州350003

出　　处：《福建林业科技》2024年第1期73-77,82,共6页Journal of Fujian Forestry Science and Technology

基　　金：福建省林业科技项目(长汀马尾松低效林森林质量精准提升抚育改造技术及模式优选,2021FKJ16);福建省林业科技项目(松林改造提升关键技术研究与集成示范,2021FKJ01)。

摘　　要：为了解不同改造方式对马尾松林下植被多样性的影响,在福建省长汀县河田镇以未改造的马尾松林为对照,选择2020年改造的5种带宽(6、8、10、15、20 m)皆伐后套种(密度2500株·hm^(-2))和择伐(保留密度1200株·hm^(-2))后套种6种密度(900、1050、1200、1350、1500、1650株·hm^(-2))马尾松林改造林分为研究对象,于2022年10月进行林下植被多样性调查及光照强度测定。结果表明:马尾松林经2种措施改造后,林内光照强度、林下植被数量和多样性指数均增加。带状皆伐改造以带宽8 m皆伐套种后林下植被种类(19种)及物种丰富度指数(0.1557)、Simpson多样性指数(0.9405)、Shannon-Wiener多样性指数(2.7836)、Jsi(0.9928)和Jsw(0.9952)为最优。择伐套种改造方式以套种密度1200株·hm^(-2)处理的林下植被种类(11种)、丰富度指数(0.1597)、Simpson多样性指数(0.8984)、Shannon-Wiener多样性指数(2.3356)、Jsi(0.9882)和Jsw(0.9840)为最优。综合结果表明,区域马尾松林带状皆伐改造的合理带宽为8 m,择伐套种改造最佳套种密度为1200株·hm^(-2)。In order to understand the effects of different transformation methods on the diversity of understory vegetation of Pinus.massoniana forest,the untransformed P.massoniana forest in Hetian Town,Changting C ounty was used as the CK,interplant ing after clear cutting(density is 2500 plants·hm^(-2))of five bandwidths(6,8,10,15,20 m)and six kinds of different interplanting densities(900,1050,1200,1350,1500,1650 plants·hm^(-2))after selective cutting(reserved density 1200 plants·hm^(-2))of P.massoniana transformatio n(in 2020)forest were studied,the vegetation diversity and light intensity of understory vegetat ion were investigated in October 2022.The results showed that the light intensi ty in the forest,the number and diversity of understory vegetation increased of P.massoniana forest after transformation by two measures.The understory veget ation species(19 species)and species richness index(0.1557),Simpson diversi ty index(0.9405),Shannon-Wiener diversity index(2.7836),Jsi(0.9928)and Jsw(0.9952)of P.massoniana transformation f orest after clear cutting and int erplanting with a bandwidth of 8 m were the best.The understory vegetation spec ies(11 species),richness index(0.1597),Simpson diversity index(0.8984),S hannon-Wiener diversity index(2.3356),Jsi(0.9882)and Jsw(0.9840)of P.massoniana transformation forest with the density of 1200 plants·hm^(-2) were the b est.It shows that the reasonable bandwidth of strip clear cutting transformation of P.massoniana forest in the region is 8 m,and the best int erplanting density of selective cutting and interplanting transformation is 1200 plants·hm^(-2).

关 键 词：带状皆伐 择伐套种 林下植被 植被多样性 

分 类 号：S753.535[农业科学—森林经理学] S791.248[农业科学—林学]