摘要
采用2×2联列表,计算方差比率(RVR)、χ2检验、联结系数CAC、共同出现百分数PPC,对福建三明将乐林场栲树次生林重要值较高的23个主要树种进行联结性分析。结果表明:23个树种的总体相关性指数(ITVR)1.056>1,表现为不显著的正联结关系,处于较为稳定的生长阶段;树种对间联结没有达到显著水平的有241对,占95.25%,说明种间联结关系较为松散,树种的分布有一定的独立性;栲树和木荷是两个优势种,形成共优状态,随着演替的进行其优势度有增大的趋势;主要树种栲树与林下的黄绒润楠、野柿、乌饭树、杨梅多表现为正联结,栲树与杉木和光叶山矾表现为显著负联结,栲树与鼠刺、檫木、树参表现为负联结;在栲树次生林经营过程中,低密度林分应选择补植黄绒润楠、野柿、乌饭树、杨梅,高密度林分可选择杉木和光叶山矾为抚育对象,为促进栲树天然更新可伐除林下鼠刺、檫木、树参等灌木。
With 2 × 2 contingency tables, after computing variance ratio （RVR）, Z2-test, association coefficient （CAC） and percentage of co-occurrence（PPC）, the interspecific assoeiativity between Castanopsisfargesii and other 23 main tree species in the secondary forest were studied in Jiangle county, Fujian province. The results show that the total correlation index of 23 tree species to C. fargesii （ITVR） was 1.056 （ITVR 〉 1）, which suggested that the interspecific correlation in these species was positive, but not significant, so the community was in an stable state. Associations between 241 species-pairs （account for 95.25%） were not significant, indicating relatively loose interspecifie relationships of these plant species, and the species distributed independently. C. fargesii and Schima suprba were the two dominant species and formed a co-dominant state, and the dominance had a tendency to increase along with the succession lasted. The association between C. fargesii trees and understory species such as Machilus grijsii, Diospyros kakivar, Vaccinium bracteatum and Myrica rubra mainly were positive association. However, the association between C.fargesii trees and Cunninghamia lancolata, Symplocos lancifoliais were notability negative association, and the association between Cfargesii trees and Itea chinensis, Sassafras tzumu, Dendropanax dentiger were negative association. In the course of C.fargesii management, in the low density stands, Machilus grijsii, Diospyros kakivar, Vaccinium bracteatum or Myrica rubra should be replanted; in the high density stands, C.lancolata and S. lacifolia should be taken as the tending objects; in order to promote the natural regeneration of C.fargesii secondary forest, the under- story sueh as Itea ehinensis, Sassafras tzumu and Dendropanax dentiger ean be felled.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2016年第1期101-106,共6页
Journal of Central South University of Forestry & Technology
基金
"十二五"国家科技支撑计划项目"南方集体林区生态公益林可持续经营技术研究与示范"(2012BAD22B05)
关键词
栲树次生林
杉木
林下植物
种间联结
福建将乐县
Castanopsis fargesii secondary forest
Cunninghamia lancolata
understory plants
interspecific association
Jiangle county of Fujian province
