侧柏游憩林抚育对林下植物组成及多样性的影响  

Effects of Tending on Species Composition and Diversity of Undergrowth in Platycladus orientalis Recreational Stands

作　　者：汪平[1] 贾黎明[1] 李效文[2] 姜林林[1] 

机构地区：[1]省部共建森林培育与保护教育部重点实验室(北京林业大学),北京100083 [2]浙江省亚热带作物研究所

出　　处：《东北林业大学学报》2012年第11期78-82,共5页Journal of Northeast Forestry University

基　　金：北京市教育委员会科学研究与科研基地建设项目(SYSBL2009);北京市科技计划项目(Z00060660000701);北京市教育委员会学科建设与研究生教育建设项目产学研联合培养研究生基地(CXYBL2008-2010)

摘　　要：为了寻求适合侧柏游憩林的最佳抚育模式,分别对北京西山地区阴、阳坡厚土侧柏林分进行了3种不同模式的抚育,采用分层样方法连续4 a定位监测林下植物组成及多样性动态。结果表明:1)抚育后第1～3年,阴、阳坡厚土侧柏林分林下植物优势种组成不变,灌木层孩儿拳、荆条及草本层求米草的优势度相对稳定。2)A1、A3抚育模式下,阴坡厚土林下植物Patrick指数R显著增加(P<0.05),其中A3模式丰富度作用效果最佳;B2及B3抚育模式下,阳坡厚土林下植物R显著增加,其中B2模式丰富度作用效果最佳。3)A1、A3抚育模式下,阴坡厚土林下植物Shannon指数H'显著增加(P<0.05),其中A3模式多样性作用效果最佳;B1抚育模式下,阳坡厚土灌木层植物H'显著增加。4)不同抚育模式下,两种林分林下植物Pielou指数Js,w相对稳定。对侧柏游憩林实施不同模式的抚育是科学可行的,有助于维持林下植物组成稳定性和提高植物多样性。建议阴坡厚土林分采取A3抚育模式,阳坡厚土林分采取B1或B2抚育模式。Quantified tending measures with three regimes were taken respectively in two Platydadus orientalis stands in West Mountain of Beijing to seek its optimal tending regimes. Stratified sample method was employed to investigate the species compositions and diversity of undergrowth over four growing seasons before and after ten-cling. Results indicated that domi- nant species （ Vitex negundo vat. heterophflla and Grewia biloba vat. parviflora in shrub layer, and Oplismenu~ undulatifo- lius in herb layer） did not change throughout the investigation, and their dominances remained relatively stable after tend- ing. Under regimes A1 and A3, Patrick index （R） of undergrowth increased significantly in shady slope stand with thick soil （ P〈0.05 ）. The same trend was found in sunny slope stand with thick soil under regimes B2 and B3. Regimes A3 was optimal for the improvement of species richness in shady slope stand with thick soil, while B2 was suitable for sunny slope stand with thick Soil. Under regimes A1 and A3, Shannon index （H＇） of undergrowth increased significantly in shady slope stand with thick soil （P〈0.05）. The same trend was observed in shrub layer of sunny slope stand with thick soil un- der regimes B1. Regimes A3 was optimal for the improvement of species diversity in shady slope stand with thick soil, while B1 was suitable for the sunny slope stand with thick soil. Pielou index （ J,w ） of undergrowth remained relatively sta- ble under different tending regimes throughout the investigation. Tending was found to be a scientific and feasible imple- mentation to P. orientalis recreational stand. It can maintain the stability of undergrowth species, and improve species di- versity in a relative long time. Regime A3 was recommended in shady slope stand with thick soil, while in sunny slope stand with thick soil, regimes B1 or B2 should be taken into consideration according to stand characteristics.

关 键 词：侧柏游憩林 抚育模式 优势种 植物多样性 丰富度 均匀度 

分 类 号：S753.7[农业科学—森林经理学]