| 土层厚度对筇竹无性系种群形态可塑性的影响 |
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| 引用本文： | 吴义远,董文渊,王婷,郑静楠,尹泽南,谢泽轩,田发坤.土层厚度对筇竹无性系种群形态可塑性的影响[J].西北林学院学报,2019(5):29-34. |
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| 作者姓名： | 吴义远 董文渊 王婷 郑静楠 尹泽南 谢泽轩 田发坤 |
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| 作者单位： | 西南林业大学生态与环境学院;西南林业大学筇竹研究院;西南林业大学林学院;大关县一县一品筇竹产业办公室 |
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| 基金项目： | 国家林业公益性行业科研专项(201204103);中央财政林业科技推广示范资金项目([2018]TG14号) |
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| 摘 要： | 通过探究不同土层厚度对天然筇竹无性系种群分株形态的影响,力图为筇竹的适地适竹、定向培育提供一定的理论与实践的依据。本研究运用方差分析、多重比较和冗余分析与蒙特卡洛检验,分析环境因子随土层厚度变化对筇竹分株形态的影响。结果表明:1)随着土层厚度的增加,筇竹分株高度、枝下高、节长、地径、胸径、分枝长、分枝角、鞭节长、鞭节径、蔸根长、鞭根长、隔离者节间长度和隔离者直径相应增加,隔离者总长度则相应减少。2)全磷、有机碳、全氮、水解氮及含水量对筇竹分株构件的大小起重要作用。土壤水分和养分对筇竹分株构件有着不同程度的影响,单一土壤因子对筇竹分株构件形态影响的重要性大小排序:全磷>有机碳>全氮>水解氮>含水量>全钾>速效钾>有效磷>酸碱度。筇竹无性系分株构件随土层厚度的递增呈现出明显的梯度变化,不同土层厚度中水分和养分资源分配的差异性决定了筇竹分株形态的大小。其中,全磷、有机碳、全氮、水解氮和含水量是影响筇竹分株形态的关键因素。
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| 关 键 词： | 筇竹无性系 土层厚度 水分 养分 形态可塑性 |
Effects of Soil Thickness on Morphological Plasticity of the Population of Natural Qiongzhuea tumidinoda Clone Ramet |
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| WU Yi-yuan,DONG Wen-yuan,WANG Ting,ZHENG Jing-nan,YIN Ze-nan,XIE Ze-xuan,TIAN Fa-kun.Effects of Soil Thickness on Morphological Plasticity of the Population of Natural Qiongzhuea tumidinoda Clone Ramet[J].Journal of Northwest Forestry University,2019(5):29-34. |
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| Authors: | WU Yi-yuan DONG Wen-yuan WANG Ting ZHENG Jing-nan YIN Ze-nan XIE Ze-xuan TIAN Fa-kun |
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| Institution: | (Ecological and Environment College of Southwest Forestry University,Kunming 650224,Yunnan,China;Qiongzhu Research Institute of Southwest Forestry University,Kunming 650224,Yunnan,China;Forestry College,Southwest Forestry University,Kunming 650224,Yunnan,China;Qiongzhu Industry Office in Daguan County,Daguan 657400,Yunnan,China) |
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| Abstract: | To explore the effect of different soil thicknesses on the morphology plasticity of natural Qiongzhuea tumidinoda clones ramets,and to provide some theoretical and practical supports for Q.tumidinoda placement and orientation training.Analysis of variance,multiple comparison,redundancy analysis and Monte Carlo Permutation test were adopted to explore and identify associations of the changes in environmental factors along soil thickness to the Q.tumidinoda ramet morphology.1) With the increase of soil thickness,The ramet height,height under branch,knot length,ground diameter and diameter at the breast height,length and the angle of the branch,length and diameter of the rhizome,length of stump-root section and rhizome-root section,length and diameter of the spacer correspondingly increased,and the total length of the spacer correspondingly decreased.2) The size of morphology of Q.tumidinoda ramet component was mainly determined by total phosphorus,organic carbon,total nitrogen,hydrolyzed nitrogen and water content.Soil moisture and nutrients had different effects on the morphology of Q.tumidinoda ramet component.The importance in the effects of soil factors on the morphology of Q.tumidinoda ramet component was ranked as total phosphorus>organic carbon>total nitrogen>hydrogenated nitrogen>water content>total potassium>available potassium>available phosphorus>pH.The morphology of Q.tumidinoda ramet showed a significant gradient change with the increase of soil thickness and it was determined by the differences of water and nutrient resource allocation in soil thickness.Among them,the morphology was mainly affected by total phosphorus,organic carbon,total nitrogen,hydrolyzed nitrogen and water content. |
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| Keywords: | Qiongzhuea tumidinoda clone soil thickness biomass allocation redundancy analysis morphological plasticity |
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