华北落叶松人工林不同间伐水平下林下植物多样性研究——以山西关帝山龙兴林场为例
收稿日期: 2016-10-25
修回日期: 2016-11-14
网络出版日期: 2020-10-03
基金资助
林业公益性行业专项“太行山西侧生态公益林提质增效关键技术研究”(201404417);山西省攻关项目“油松人工林高产高效适应性经营和林地管理技术体系研究”(20140311014-3);山西省国际合作项目“华北山地森林结构多样性对森林生产力的效应及其作用机制”(2015081001)
Research on Undergrowth Plant Diversity in Larix Principis-rupprechtii Plantation with Different Thinning Levels —Taking Longxing Forest Farm of Guandishan in Shanxi Province as an Example
Received date: 2016-10-25
Revised date: 2016-11-14
Online published: 2020-10-03
抚育间伐是森林经营的重要技术措施之一,是保持和提高森林生物多样性和森林可持续经营的重要途径。因此,通过间伐试验和定点观测阐明间伐对林下植物多样性的作用,不同间伐强度影响林下植物多样性的差异,不同间伐强度影响林下植物多样性的持续时间和动态变化,对揭示经营活动在森林生物多样性形成和维持机制中的作用,具有重要理论和实践意义。通过对关帝山林区龙兴林场华北落叶松人工林的不同强度间伐试验和6年定点观测,采用植物种类组成和物种多样性指数对比分析法、群落相似性Sorensen指数分析法,以揭示不同强度间伐对华北落叶松人工林林下植物种类组成、植物物种多样性的影响及其动态趋势,研究结果表明:间伐会显著增加华北落叶松人工林的林下灌木和草本植物种类,且间伐强度越大种类增加越多,间伐还能显著提高华北落叶松人工林的林下植物多样性,不仅间伐与未间伐之间有显著差异,不同间伐强度之间林下植物多样性指数的差别也很明显,而中度和强度间伐的效应更显著;在伐后6年内林下植物种数和多样性指数都在持续增加,伐后6年的效应仍然显著。间伐林分与对照林分相比,林下植物共有种和相似性系数显著降低,而且间伐强度差别越大,共有种和相似性系数越低。
刘红炎 , 陈东莉 , 柳杰 , 赵宇 , 张芸香 , 郭晋平 . 华北落叶松人工林不同间伐水平下林下植物多样性研究——以山西关帝山龙兴林场为例[J]. 林草资源研究, 2017 , 0(1) : 50 -56 . DOI: 10.13466/j.cnki.lyzygl.2017.01.010
Thinning is one of the important technical measures of forest management and also an important way to improve and maintain forest diversity and sustainability.Therefore,thinning and fixed-point observation which can clarify the impacts the thinning operations have on undergrowth diversity,the difference which different thinning intensities make in undergrowth diversity and the effects the different thinning intensities have on the duration and dynamic change of plant diversity,which can also reveal the impacts the management activities have on the formation of forest diversity and the role in maintaining mechanism and have important theoretical and practical significance.In this paper,through a series of different thinning intensity tests and a 6a fixed observation in Larix principis-rupprechtii plantation in Longxing Forest Farm,using plant species composition,species diversity index and community similarity index of Sorensen to analyze and reveal the difference which different thinning intensities made on the Larix principis-rupprechtii plantation undergrowth species composition and its influence on the plant species diversity and its dynamic change.Results suggest that thinning can significantly increase the undergrowth plant diversity.The plant species increased as the thinning was enhanced.In addition,thinning can also increase species diversity of undergrowth plants significantly.There are significant differences between the thinned and the unthinned.The difference of species diversity under different thinning intensities is also obvious.Medium and heavy thinning had more significant influence.After thinning for 6a,plant species of undergrowth plants and diversity index continued to increase and the thinning effect was still significant.Compared to the control stands,the mutual plant and similarity coefficient of undergrowth plants were significantly lower.The mutual plant and similarity coefficient would be lower if there was greater difference in thinning intensity.
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