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当前位置: 首页 > 文章 > 桂南不同植被模式公益林植物多样性与土壤因子的关系 中南林业科技大学学报 2015 (5) 109-113+121
Position: Home > Articles > Relationship between plant diversity and edaphic factors in non-commercial forests in southern Guangxi Journal of Central South University of Forestry & Technology 2015 (5) 109-113+121

桂南不同植被模式公益林植物多样性与土壤因子的关系

作  者：
庞世龙;黄小荣;欧芷阳;彭玉华;侯远瑞
单  位：
广西壮族自治区林业科学研究院
关键词：
公益林;植被模式;物种多样性;土壤理化性状;桂南
摘  要：
采用样方调查及取样分析方法,研究了桂南地区4种不同植被模式生态公益林植物群落物种多样性及其与土壤因子的关系,运用逐步回归分析法,筛选出对物种多样性指数影响显著的土壤因子,建立最优线性回归方程。结果表明:(1)不同植被模式乔木层、灌木层、草本层的物种多样性指数存在一定差异。乔木层,Margalef丰富度指数、Shannon-Wiener多样性指数、Simpson优势度指数和Pielou均匀度均以马尾松×红锥混交林最大,物种多样性相对最高,马尾松纯林和马尾松×椆木混交林次之,大叶栎纯林最低;灌木层,各物种多样性指数的变化趋势为马尾松纯林>马尾松×红锥混交林>大叶栎纯林>马尾松×椆木混交林;草本层各多样性指数无显著差异。(2)不同植被模式对土壤理化性状产生了一定影响。综合比较,马尾松×红锥混交林和马尾松×椆木混交林对土壤的改良作用较显著,大叶栎纯林次之,马尾松纯林最差。(3)速效磷、全氮、全磷、全钾、最大持水量、总孔隙度、毛管孔隙度、自然含水率和容重分别与植物各层物种多样性指数存在极显著(P<0.01)的线性关系,它们是拟合各层物种多样性指数方程的关键因素。
译  名：
Relationship between plant diversity and edaphic factors in non-commercial forests in southern Guangxi
作  者：
PANG Shi-long;HUANG Xiao -rong;OU Zhi -yang;PENG Yu-hua;HOU Yuan-rui;Guangxi Zhuang Autnomous Region Forestry Research Institute;Key Lab. of Central South Fast-growing Timber Cultivation,Forestry Minstry of China;Guangxi Key Lab. of Superior Timber Trees Resource Cultivation;
关键词：
non-commercial forest;;vegetation pattern;;biodiversity;;soil physical and chemical properties;;southern Guangxi
摘  要：
Four types of non-commercial forest in southern Guangxi were investigated to explore their biodiversity and the relations to edaphic factors. Stepwise regression analysis was used to identify factors signifi cantly impacted diversity indexes, and optimal linear regression equations were developed for these factors. The results show that(1) Different forest types varied in diversity indexes(canopy, shrub and herb layers). In the canopy layer, Pinus massoniana×Castanopsis hystrix mixed forests had the highest Margalef richness index, Shannon Wiener diversity index, Simpson dominance index and Pielou evenness, and also had the highest diversity, following by P. massoniana pure forests, P. massoniana × Lithocarpus glaber mixed forests, and the last was Castanopsis fi ssa pure forests; In the shrub layer, the species diversity from big to small ranked as follows: P. massoniana pure forest > P. massoniana×C. hystrix forest >C. fi ssa forest > P. massoniana×L. glaber forest, the herb layers did not show signifi cant differences in diversity indexes;(2) Different forest types all had certain infl uences on soil physical-chemical properties, a comprehensive comparison revealed that the two mixed forest types(P. massoniana×C. hystrix forest and P. massoniana×L. glaber forest) had signifi cantly improved the soil properties, while following by C. fi ssa forest, and the last was pine forest;(3) The diversity indexes for each plant layer were linearly related to these edaphic factors(P < 0.01)(available phosphorus, total nitrogen, total phosphorus, total potassium, maximum water holding capacity, bulk porosity, capillary porosity, moisture content and bulk density), which were the key factors in fi tting the diversity index equations.

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