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Leaf morphology correlates with water and light availability:What consequences for simple and compound leaves?

Progress in Natural Science:Materials International 2009年第12期19卷 1789-1798页

作者： Fei Xu,Weihua Guo~*,Weihong Xu,Yinghua Wei,Renqing Wang~* Institute of Ecology and Biodiversity,College of Life Sciences,Shandong University,Jinan 250100,China Institute of Ecology and Biodiversity College of Life Sciences Shandong University Jinan 250100 China

Leaves are organs sensitive to environmental changes in the process of evolution and may exhibit phenotypic plasticity as a response to abiotic ***,affirmation of leaf morphological plasticity and its regulations in different environments are still *** performed a simulated experiment to study the variations of leaf morphology in different gradients of water and light *** different types of leaves and venation,we chose pinnate-veined simple leaves of Quercus acutissima and compound leaves of robinia pseudoacacia as the study *** morphological parameters we investigated include leaf size,shape and venation pattern which can be easily measured in the *** variations occurred in many parameters due to the effects of the environment and/or *** were broadly consistent trends for leaf morphological variations along the *** leaf size became smaller with a short supply of *** elongation and fractions of the lamina area altered to enhance resources acquisition and conservation. Trade-offs between investments in support and functional structures optimized the venation pattern of major and minor *** partially played a role such as leaf teeth,for they are not only individual units,but also a part of the compound *** suggest that more or less the same trends in morphological variations may be an important explanation for coexisting species to adapt to similar habitats and form the niche differentiation.

关键词： Environmental correlation Leaf morphological trait Leaf type Venation pattern Quercus acutissima robinia pseudoacacia

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Exotic tree seedlings are much more competitive than natives but show underyielding when growing together

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Journal of Plant Ecology 2013年第4期6卷 305-315页

作者： Heike Kawaletz Inga Mölder Stefan Zerbe Peter Annighöfer André Terwei Christian Ammer Department of Silviculture and Forest Ecology of the Temperate Zones University of GöttingenBüsgenweg 137077 GöttingenGermany Energieagentur Region Göttingen e.V. Berliner Str.237073 GöttingenGermany Faculty of Science and Technology Free University of Bozen-BolzanoPiazza Università539100 BolzanoItaly

Aims Invasive species continue to be a worldwide threat to ecosystems mainly as a cause for biodiversity *** ecosystems,for example,are subject to a change in species composition due to the invasion of exotic *** the attributes that cause the strong competitiveness of several exotic species may improve the ability to understand and effectively manage plant invasions in the *** this study the following hypotheses were tested:(1)biomass production of below-and aboveground plant compo-nents of the exotic tree species is higher than that of the natives,resulting in a higher competitiveness of the exotics;(2)the exclu-sion of root competition has a positive effect on the biomass pro-duction of the inferior native species;and(3)mixtures of native and exotic species yield a higher biomass production than the respective *** a pot experiment,containing about 2000 tree seedlings,was *** investigated the biomass productivity and growth reactions of two native(Quercus robur l.,Carpinus betulus l.)and two exotic tree species(Prunus serotina Ehrh.,robinia pseudoacacia l.)in different intra-and interspecific,competitive situations with and without the influence of root *** Findingsthe biomass production of both exotic species was significantly higher and led to a strong competitive advantage,resulting in a biomass decrease of the less competitive native *** high belowground biomass of both exotic species had a negative effect on the biomass *** competitive pressure of exotic tree seedlings on the native ones was largely driven by root ***,mixtures of native and exotic tree species had a higher productivity than their growth in monocultures would have *** was lower for exotic species in mixtures with the less productive native species compared to the competition in monocultures or in mixture with the other highly productive exotic ***,b

关键词： competition biomass production pot experiment invasive species Prunus serotina robinia pseudoacacia

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无刺刺槐木材基础材性研究及其品质评定

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林业科技通讯 2021年第10期 25-28页

作者：曹蕊吕黄飞杨浩徐斌安徽农业大学林学与园林学院合肥230036 安徽南北现代林业科技有限公司安徽宿州234000

以‘皖槐1号’刺槐(robinia pseudoacacia)人工林木材为对象,对其解剖构造、密度、干缩率及物理力学性质进行研究,并对其木材品质进行评估。结果表明:‘皖槐1号’木材纤维形态均匀,纤维平均长度、宽度分别为1 232.97、21.56μm,长宽比57... 详细信息

以‘皖槐1号’刺槐(robinia pseudoacacia)人工林木材为对象,对其解剖构造、密度、干缩率及物理力学性质进行研究,并对其木材品质进行评估。结果表明:‘皖槐1号’木材纤维形态均匀,纤维平均长度、宽度分别为1 232.97、21.56μm,长宽比57.18,腔径比0.56;导管平均长度、宽度分别为226.13、154.31μm;微纤丝角为15.85°;气干密度、全干密度、基本密度分别为0.79、0.71、0.65g/cm3;弦向、径向、体积的气干干缩率分别为3.85%、2.15%、6.47%,弦向、径向、体积的全干干缩率分别为7.53%、4.88%、12.86%,气干和全干差异干缩分别为1.79和1.54;抗弯强度、顺纹抗压强度、抗弯弹性模量分别为152.71 MPa、52.94 MPa、12.07 GPa;品质系数为316.37 MPa。综合分析表明,当为制浆造纸和纤维板原料时,‘皖槐1号’木材属优等木材;作为结构用材时,综合强度及品质系数均属"高"级。

关键词： ‘皖槐1号’ robinia pseudoacacia 解剖构造物理力学性质

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育苗方式对刺槐无性系插根苗生长的影响

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林业科技通讯 2020年第11期 47-52页

作者：伍越任永俊郭龙梅曹帮华毛培利陈海燕李泽秀史峻峰梁彦国山东农业大学林学院山东泰安271018 淄博市沂源县历山街道办事处山东淄博256199 泰安市徂徕山林场山东泰安271027 东平县第二苗圃山东东平271500

以刺槐(robinia pseudoacacia)无性系W027、W022、W035、W043、W044、W052为研究对象,于2019年4月进行育苗试验,比较无性系之间直接插根育苗、容器插根育苗定植在高床、高垄垄底的4种组合条件下的育苗效果。结果表明:容器根插育苗效果... 详细信息

以刺槐(robinia pseudoacacia)无性系W027、W022、W035、W043、W044、W052为研究对象,于2019年4月进行育苗试验,比较无性系之间直接插根育苗、容器插根育苗定植在高床、高垄垄底的4种组合条件下的育苗效果。结果表明:容器根插育苗效果优于根插苗,苗高、地径、茎干相对含水量极显著大于根插苗,根冠比显著大于根插苗,根系相对含水量差异并不显著;垄底容器育苗效果优于高床容器育苗,各指标均达到极显著差异水平;6个刺槐无性系高床容器苗在苗高和地径上的排序并不一致,苗高为W044>W052>W043>W027>W022>W035,地径为W027>W044>W043>W052>W022>W035。综合考虑,采用垄底定植刺槐容器根插苗,可获得更高质量的苗木。

关键词：刺槐 robinia pseudoacacia 无性系育苗方式生长指标根冠比

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Thermogenetic curves and thermokinetics of seed germination of robinia pseudoacaia

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Journal of Forestry Research 2001年第3期12卷 176-178,210页

作者：胡云楚周培疆王存信屈松生中南林学院株洲412006 武汉大学化学与环境科学学院武汉430072

Seed germination process has closely relation with material transformation and energy exchange within the seed. Study on its thermal effect is important for understanding the mechanism and the influencing factors of the seed germination. The thermogenetic curves of seed germination ofrobinia pseudoacacia was measured by a new-type conductive microcalorimeter made in Wuhan University. The relationship was analyzed between the germination thermogenetic regulation and seed germination physiology. The thermogentic curves were further analyzed by thermokinetic theory to obtain the dynamic parameters and the thermokinetic model on seed germination ofrobinia pseudoacacia. The relationship of the thermogenetic power (μ w) and the germination time(h) of the germination process of 20 grainsrobinia pseudocacia seeds at 25°C wasP=208.77/[0.1937+0.8063exp(?0.06563t)]

关键词： thermogenetic curve thermokinetics seed germination robinia pseudoacacia

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