不同践踏强度对东北百里香坪床理化性质的影响  

Effect of trampling intensity on soil physicochemical traits in the Thymus mandschuricus field

作　　者：王玲[1] 刘桂伶[1] 朱振亚[1] 闫绍鹏[2] 

机构地区：[1]东北林业大学园林学院,哈尔滨150040 [2]东北林业大学生命科学学院,哈尔滨150040

出　　处：《安徽农业大学学报》2014年第5期843-847,共5页Journal of Anhui Agricultural University

基　　金：中央高校基本科研业务费专项资金(DL13EA07);黑龙江省博士后启动金(LBH-Q12168);哈尔滨市科技创新人才专项资金留学回国人员项目(RC2013LX002002)共同资助

摘　　要：我国特有种东北百里香(Thymus mandschuricus)是节水抗旱的优良野生芳香型观花木本地被植物,在北方城市园林绿化及植被恢复方面具有广阔的应用前景,尤其是干旱地区。结合新地被种类推广应用的需求,以东北林业大学实验基地引种繁殖的东北百里香为试验材料,研究不同程度践踏强度对东北百里香的坪床理化性质的影响。结果显示,土壤紧实度随着践踏强度和践踏次数的增加而呈现上升趋势,中度和重度践踏5次后,土壤紧实度分别达到0.401和0.531 kp,相对于对照0.243 kp差异显著(P<0.05);土壤紧实度增加导致水分渗透下降,土壤含水量下降,土壤pH值增大;土壤养分(全氮、有效磷、速效钾)的含量呈下降的趋势,与对照相比差异达到显著差异水平(P<0.05),影响了植物生长和生物量的积累。矮生种东北百里香枝条柔韧性好,使其耐一定程度践踏,这不同于一般的木本地被植物。园林应用在不影响观赏性情况下,容许轻度践踏。本试验结果可为木本地被植物的推广应用提供理论与实践指导。Thymus mandschuricus, an endemic species to China, is an elite wild fragrant ornamentalground-cover plant with the characteristics of water-saving and drought-tolerance. Thymus mandschuricus playsan important role in urban landscaping and vegetation restoration, particularly in arid areas. With the demandingof new ground-cover plant species, T mandschuricus was used to determine the effect of trampling intensity onsoil physicochemical characteristics in the experimental base of Northeast Forest University. The results showedthat the soil compaction increased with an increase of trampling frequency and intensity. After moderately orheavily trampling for 5 times, the soil compaction significantly researched to 0.401 or 0.531 kp, respectively,compared to the control of 0.243 kp （P〈0.05）. Increase of soil compaction led to the decrease of water infiltrationand soil water, while soil pH increased. Compared to the control, the content of soil nutrients （nitrogen, phospho-rus, and potassium） significantly decrease after moderately and heavily ffampling, which affected plant growthand biomass accumulation. T. mandschuricus can maintain its ornamental characteristics under mild tramples dueto its dwarfness and twig flexibility. This experiment would provide a theoretical and practical guidance for theapplication of ground-cover woody plants.

关 键 词：东北百里香 践踏强度 坪床理化性质 

分 类 号：S731.2[农业科学—林学]