[目的]研究不同经营模式对油桐人工林物种多样性的影响情况,为油桐生态经济林模式的研究奠定理论基础.[方法]以湖南省浏阳市实生繁殖且已进入盛果期的5000 hm2油桐林为研究对象,采用随机布设样地与典型抽样法相结合的方法进行调查,研究3种经营模式(油桐纯林模式、林下种植模式和林下养殖模式)对油桐林的群落结构和物种多样性的影响情况.[结果]不同经营模式的油桐林群落中物种多样性指数均较低,其变化较为复杂且缺少一定的规律性.调查到的灌木共有22种,草本植物共有52种;林下养殖模式的油桐林中重要值最大的物种为莎草(其重要值为87.94),林下种植模式的油桐林中重要值最大的物种为菊花(其重要值为92.19).3种经营模式的油桐林灌木层和草本层中物种多样性指数的大小顺序均为油桐纯林>林下养殖>林下种植.林下养殖模式、林下种植模式、油桐纯林模式的油桐树树高年增长量分别为3.80、2.40、1.53 m·a-1,其胸径年增长量分别为3.63、4.00、2.80 cm·a-1,其单株材积年增长量分别为0.075、0.056、0.029 m3·a-1;林下养殖模式的油桐树树高年增长量显著高于林下种植模式与油桐纯林模式的,林下养殖模式的油桐树单株材积年增长量同样显著高于林下种植模式与油桐纯林模式的.同时,林下养殖模式的油桐树单株结果量、单株产果量、总产量均显著高于油桐纯林模式的,但与林下种植模式的差异均不显著.表土层(0～20 cm)中,3种经营模式的油桐林地土壤容重的大小顺序为油桐纯林模式>林下种植模式>林下养殖模式,其土壤毛管孔隙度与总孔隙度的大小顺序均为林下养殖模式>林下种植模式>油桐纯林模式;心土层(20～40 cm)中,3种经营模式的油桐林地土壤容重的大小顺序为油桐纯林模式>林下养殖模式>林下种植模式,其土壤毛管孔隙度的大小顺序为油桐纯林模式>林下种植模式>林下养殖模式,其土壤总孔隙度的大小顺序为林下种植模式>林下养殖模式>油桐纯林模式.[结论]根据油桐林的群落结构特征,在油桐人工林的营造和经营管理过程中,应选用适宜模式并采取人工干预措施,促进树种的合理生长,以提高油桐综合经营的经济效益与生态效益.

[目的]为探讨水培条件对绣球花外植体生根的影响,丰富和发展绣球花的繁育技术.[方法]以当年生的绣球花枝条为材料,通过测定平均生根率、平均每株根长、平均生根时间、平均每株生根数等指标系统研究了激素种类、激素浓度和插条部位对绣球花水培生根的影响.[结果]在水培条件下,绣球花插条15 d左右开始生根.无菌水和NAA处理的插条的平均每株生根数量和平均每株根长优于IBA处理的插条.低NAA浓度可以促进插条生根,但差异不显著,但当NAA浓度超过15 mg·L-1时,浸水部分的外植体表皮颜色明显变红,插条的平均每株生根数量和平均每株根长显著下降.插条类型对生根率、生根数量和根长具有显著影响,低浓度时(0和5 mg·L-1),插条的平均生根率由高到低排序为上段插条>中段插条>下段插条,插条的平均生根率高达98.0％ 以上;当浓度为10 mg·L-1时,中段插条的平均生根率和平均每株根长都显著高于上段和下段插条,适当提高激素浓度可以显著提高木质化插条的平均生根率.对比绣球花插条的生根部位发现,绣球花水培的生根方式为皮生根,上段插条浸入溶液中的部分均可以生根,而中段和下段插条的生根部位主要集中在节间附近,可能是由于上段插条木质化程度低,插条的分生组织活跃,而中段和下段插条木质化程度高,节间周围的分生组织活跃.[结论]激素种类、激素浓度和插条类型对绣球花水培苗的繁育具有显著影响,低浓度可以促进插条生根,但高浓度具有抑制作用.以中段插条为材料,在NAA浓度为10 mg·L-1条件下,插条不但生根率高,而且根系发达,可以繁育出高质量的绣球花水培苗.

"互联网+"时代背景与数字化学习环境下,微课作为一种数字化教学新形式,依托数字教育资源实现了普及与发展,这种在教育行业开展的变革和创新,为中国教育体系带来了新的机遇与挑战.针对微课的概念、框架构成以及关键技术进行了细致阐述,同时指出新形势下微课所面临的新挑战,并从微课的认知、设计与制作、应用与评价等角度介绍微课优化的途径,以期为微课发展与推广提供科学借鉴.

采用热活化技术改性上水石,探讨热活化前后上水石的特征变化和吸附能力,同时考察了热活化后上水石对Cd(Ⅱ)的吸附动力学、吸附热力学及吸附机理.结果表明:(1)热活化后上水石表面形成塌陷和界面缺陷,能提供更多的吸附活性位点来有效提高其吸附能力.(2)上水石经750℃热活化后,吸附量显著提高.其中,750℃热活化后的山东省、山西省上水石的最大吸附量分别为37.20、24.65 mg/g.上水石对Cd(Ⅱ)的吸附更符合准二级动力学模型,表明吸附速率由化学吸附控制.Langmuir模型能更好拟合上水石对Cd(Ⅱ)的吸附,反映了该吸附过程是单层吸附.(3)热活化后上水石对Cd(Ⅱ)的吸附机理可归因于形成了CdCO3、Cd(OH)2和(Ca,Cd)CO3的表面沉淀.

[目的]建立千年桐优株评价的指标体系,筛选出千年桐优株.[方法]从320株盛果期的千年桐中初选出32株备选优树,利用相关性分析法、主成分分析法和聚类分析法,根据鲜果总质量、鲜果单果质量、果高、果径、总果数、单株产果量、胸径、树高、果壳厚度、干种仁质量、干籽出仁率、鲜果出籽率、脂肪含量、单株产油量和种仁含油率共15个经济性状指标,从32株备选优树中筛选出3个最优单株.[结果]利用主成分分析法,提取了4个主成分,第1主成分为产量果型因子,方差贡献率为30.935％,第2主成分为经济品质因子,方差贡献率为26.740％,第3主成分为表型因子,方差贡献率为8.223％,第4主成分为树体因子,方差贡献率为8.528％,4个主成分累积方差贡献率为84.425％;建立了千年桐果实品质的综合评价模型:F=a1Z1+a2Z2+a3Z3+a4Z4;聚类分析将32株千年桐聚分为三类,其中Ⅰ类7株、Ⅱ类12株、Ⅲ类13株,Ⅰ类中排名前三的为国盛9号、国盛8号、国盛19号,该3株优树的综合性状最优,可确定为目标优树.[结论]与千年桐产油量相关的结实量指标和果实内含物指标在不同单株间差异明显,对千年桐进行单株选择具有重要意义.本研究选出了3株目标优树,为千年桐优良无性系繁育打下了基础.

本文对栎属27个树种采用ISSR分子标记技术和非加权平均距离法(UPGMA)进行亲缘关系和聚类分析,结果表明:12条引物共扩增出140个位点,其中有115个是多态性位点,比率为82.14％,引物UBC864和UBC812分别扩增16、9个位点;27种栎属树种的观测等位基因数为1.8071,有效等位基因数为1.3688,Nei′s基因多样性指数为0.2319,Shannon′s多样性指数为0.3621,这表明栎属树种的遗传多样性较高.27种栎属树种遗传一致度的变化范围在0.5429～0.9000之间,北美红栎与月桂叶栎遗传一致度最大,为0.9000;栓皮栎与椭圆果栎遗传一致度最小,为0.5429.27种栎属树种被分为5大类群,其中:短柄枹栎和白栎、北美红栎与月桂叶栎、南方红栎与柳叶栎等聚在一起,与传统形态分类一致;小叶栎与娜塔栎分为一类,与传统形态分类不一致.部分聚类结果与形态分类并不一致,具体原因还需进一步研究;聚类未完全按照来源地进行分组,材料之间存在一定交叉.本研究利用ISSR分子标记技术可很好的区分27种栎属树种,并得出其多态位点百分率,遗传距离、遗传一致度等一系列数据,有助于进一步了解栎属树种的遗传基础,揭示其亲缘关系,为栎属树种杂交育种提供参考.该技术也可应用到栎属新品种鉴定、杂交亲本的选配与新种质资源的划分等领域,应用前景广阔.

[目的]干旱是限制木兰科树种推广应用最主要的逆境因素,深入研究不同树种的及形态、生理生化特性等抗旱指标,鉴定抗旱相关性状及抗旱机制,成为抗旱育种的重要前提.[方法]以武当木兰、红花木莲、乐昌含笑、乐东拟单性木兰为试验材料,采用盆栽试验对其进行干旱胁迫,研究了干旱胁迫对植物根冠比、叶绿素含量、丙二醛(MDA)含量、过氧化物酶(POD)含量、过氧化氢酶(CAT)含量、可溶性蛋白(SP)等6个指标的影响.[结果]1)随着干旱胁迫程度的增加,4种木兰科树种的根冠比均呈上升趋势;2)叶绿素含量随干旱胁迫的增加而显著降低(P<0.05),叶绿素总量相对于对照组在重度干旱胁迫下分别下降74.08％、54.92％、59.48％、31.33％,且下降至最低值;3)丙二醛(MDA)含量、过氧化物酶(POD)含量随干旱程度增加呈上升趋势,且武当木兰的上升幅度最大,分别上升38.71％、304.28％;可溶性蛋白(SP)含量、过氧化氢酶(CAT)含量与随干旱程度增加呈下降趋势,且以红花木莲与乐昌含笑下降幅度最小,分别下降35.71％、69.85％.[结论]4种木兰科植物的抗旱能力表现为最强的是乐昌含笑,其次为乐东拟单性木兰和武当木兰,最后是红花木莲.乐昌含笑具有树姿雄伟、叶密浓绿、花色鲜艳、芳香四溢、材质优良等特性,可成为长江以南地区城市绿化的重要树种.

为了解云南省木兰科(Magnoliaceae)野生植物资源的遗传多样性,利用ISSR分子标记技术对48种木兰科野生植物资源进行研究.结果表明,10对引物共扩增出151条带,均为多态性条带,多态性条带百分率为100％.总的观测等位基因数(Na)为2.000 0,有效等位基因数(Ne)为1.564 5,Nei's基因多样性指数(H)0.337 9,Shannon's信息指数(I)为0.510 1.总的基因多样性指数(Ht)为0.368 0,属间基因多样性指数(Dst)为0.251 9,占68.4％,基因分化系数(Gst)为0.684 0,基因流(Nm)为0.231 0.UPGMA聚类分析将48种木兰科植物划分为7个类群,各类群并非按照属聚在一起,而是不同属植物相间分布,长喙厚朴(Magnolia rostrata)、素黄含笑(Michelia flaviflora)和球花含笑(M.sphaerantha)可能为云南省木兰科植物中的原始种.48种木兰科野生植物总体具有较高的遗传多样性,但属间遗传变异较高,基因流较小,存在遗传漂变的风险,聚类结果与刘玉壶的分类系统存在分歧,这从分子水平为木兰科植物间的起源、进化与分类提供了重要依据.

以'莱格西'和'灿烂'2个蓝莓品种为试验材料,采用盆栽试验进行水分胁迫(干旱胁迫、水淹胁迫),研究水分胁迫对2个品种蓝莓叶生长、叶绿素含量及叶绿素荧光特性的影响.结果表明:1)随着水分胁迫程度的加剧,'莱格西'和'灿烂'的叶长、叶宽、比叶重整体呈下降趋势;2)叶绿素含量随着水分胁迫程度的加剧而显著降低(P<0.05),二者的总叶绿素含量在重度水淹胁迫下分别下降77.14％ 和55.82％,下降至最小值;3)在水分胁迫下2个蓝莓品种的PSⅡ光反应中心受到一定程度的伤害,最小荧光(F0)、非光化学淬灭(qN)呈上升趋势,而最大荧光(Fm)、可变荧光(Fv)、PSⅡ原初光能转化效率(Fv/Fm)、PSⅡ的潜在活性(Fv/F0)和光化学淬灭(qP)呈下降趋势,以'莱格西'的光合系统受影响较大.本研究说明蓝莓品种'灿烂'比'莱格西'具有较强的耐旱性和耐淹性.

为了筛选油茶近缘种高光效种质资源,从而为培育油茶新品种提供优质材料,以2个普通油茶品种('湘林1'与'湘林97')和6个近缘种(博白大果油茶、越南油茶、浙江红山茶、溆浦大红山茶、攸县油茶、滇山茶)为试验材料,对其叶片的净光合速率、蒸腾速率、胞间CO2浓度、气孔导度、水分利用效率等光合参数进行了测定和分析.观测结果表明:滇山茶、攸县油茶、越南油茶、博白大果油茶和'湘林1'与'湘林97'叶片的净光合速率均呈"单峰"曲线的变化趋势,其气孔导度和蒸腾速率亦均呈"单峰"曲线的变化趋势,而其胞间CO2浓度却呈"V"型曲线的变化趋势;浙江红山茶和溆浦大红山茶的净光合速率均呈"双峰"曲线的变化趋势,其气孔导度呈"平稳"型曲线的变化趋势,胞间CO2浓度呈"W"型曲线的变化趋势,蒸腾速率呈"单峰"曲线的变化趋势,说明其均存在光合"午休现象".相关性分析结果表明:净光合速率与气孔导度呈极显著正相关(P<0.01),与水分利用效率呈显著正相关(P<0.05);气孔导度与水分利用效率呈极显著正相关(P<0.01).主成分分析结果表明:从5个光合参数中提取了特征根>1的主成分2个,其累计贡献率为83.545％;主成分1(F1)中净光合速率、气孔导度和水分利用效率的累计正向贡献率最多,主成分(F2)中蒸腾速率的累计正向贡献率最多;根据综合评价结果可知,2个普通油茶品种及6个近缘种的光合效率由高到低依次为:油茶'湘林1'>滇山茶>油茶'湘林97'>攸县油茶>博白大果油茶>越南油茶>溆浦大红山茶>浙江红山茶.

为了解南方型黑杨种质材料的表型及生长性状遗传多样性,丰富黑杨种质资源遗传基础,并进一步为南方地区黑杨种质资源定向选育提供参考,选取地径、苗高、叶面积、叶长、叶宽、叶柄长、叶绿素、侧枝数、叶厚、单株总叶片、叶片干质量共11个树体性状及生理指标,同时观测记录了每个无性系的生长期和抗性,对62份南方型黑杨种质资源的13个性状进行了遗传多样性分析.结果表明:62份黑杨资源分成7个类群,各类群材料根据不同性状的相似性进行聚类,整体比较分散,具有较高的分化强度.13个性状的多样性指数H'变化范围介于0.587～1.550之间,平均值为1.098,叶片相关性状以及生长期遗传多样性较丰富.主成分分析将相关变量转化为叶片形态、单株叶片数量、抗性及生长期、侧枝数4个主成分,涵盖了13个测定性状80.953％ 的遗传信息.本研究首次从表型及生长相关性状等方面探明了南方型黑杨的遗传多样性,对于充分发掘黑杨资源优良基因型,进一步开展南方型黑杨遗传改良工作具有重要意义.

为了提高大树油茶嫁接的成活率,为确定最合适的接穗提供科学依据,以不同地域和种源的36份山茶属植物为材料,采用梯度退火温度和正交试验设计的方法,用12对SSR引物进行PCR扩增,并采用UPGMA聚类法对品种间的亲缘关系进行研究.结果表明,12对引物扩增出目的条带,在12个SSR位点共获得214个等位基因.根据各品种12对引物的扩增带型得出,各品种间遗传相似系数范围为0.62～0.95,平均相似系数为0.793.聚类分析结果表明,地域来源近的品种紧密地聚在一起.SSR标记反映出的山茶属种质间的亲缘关系与形态学研究的分类结果并不完全吻合.

For understanding the photosynthetic of seven north American oak,the paper uses the Li-6400P photosynthetic apparatus to determine the light response curves and diurnal variation of triennial oaks' sapling leaves.The result shows the photosynthetic properties of seven north American oaks were significantly different.The diurnal change of net photosynthetic rate of Quercus coccinea and Quercus imbricaria was a bimodal curve,and obvious "noon break" phenomenon was presented,but others were unimodal curves.The average daily average of the net photosynthetic rate from large to small of oaks are Quercus phellos,Quercus nuttallii,Quercus michauxii,Quercus shumardii,Quercus imbricaria,Quercus falcate and Quercus coccinea in North America.There is a positive correlation between photosynthetic rate(Pn) and photosynthetically active radiation(PAR) for Quercus phellos and Quercus nuttallii during the photosynthetic characteristics and impact factors analysis.Undering the radiation conditions,the light compensation point(LCP) of seven north American oaks is between 8 and 40μmol·m-2s-1,and the light saturation point(LSP) is between 310 and 710 μmol·m-2s-1.The conclusion shows:Quercus phellos and Quercus nuttallii can grow through the illumination adaptability,famer should choose enough light land to plant tree species,reasonable density can promote the growth of young trees.

in order to study the amino acid foliar fertilizer influence on Chinese jujube flowering leaf photosynthesis,this test by setting the four treatment groups:pure amino acid fertilizer,T1 group T2 group of amino acid fertilizer mixed with phosphorus,potassium,boron dispensing,T3 group of phosphorus,potassium,boron fertilizer,commonly used water CK group,the jujube bud,flowering foliar fertilizer spraying,and use the Li-6400 portable photosynthesis meter in each treatment group of photosynthetic parameters were determined.Results show that:(1) amino acid foliar fertilizer can promote Chinese jujube flowering of leaf photosynthesis,and together with phosphorus,potassium,boron fertilization effect best,T3 group of phosphorus,potassium,boron commonly used fertilizer effect is not significant;T2 group average daily net photosynthetic rate,stomatal conductance,water use efficiency,light energy utilization compared with CK group increased by 40.3％,42.9％,21.5％ and 40.3％ respectively;T1 daily water use efficiency compared with CK group increased by 19.2％;(2) the photosynthesis of growing period mainly at 9:00,11:00,15:00 17:00;(3) T2 group under the condition of strong,the weak light adaptability optimal,the strongest potential accumulation of organic matter.

工程质量“使用后评价(POE)”是工程学领域中工程策划的主要内容之一,灰色关联分析也是现代设计方法论中的重要手段之一,文章在分析POE特征的基础上,构建了基于灰色关联分析的园林工程质量POE评价模型,选取了15项评价指标并运用因子分析权数法,确定了其权重系数,变幅为0.0477～0.0989,其中植物种植工程(0.0989)的权重最高,假山工程(0.0477)的权重最低.以湖南省长沙市梅溪湖11个工程样地为研究对象,利用灰色关联分析法对园林工程的景观质量进行综合评价.结果表明:基于加权法的关联度变幅为0.799～0.989,其中,桃花岭工程(Y=0.989)、白沙滩工程(Y=0.955)和银杏公园(Y=0.953)综合表现最好;龙王港工程(Y=0.799)表现最差.POE这种强调调查研究、注重实证的科学设计思想和研究方法的引入,可为提高设计质量,增加我国园林工程设计的国际竞争力提供科学依据.

柳栎树形优美,且抗高温和寒冷气候,是目前国内最具前景的多用途树种.考察了立地类型、栽植方式和苗木地径规格对柳栎造林成活率及苗高、地径生长的影响,结果表明:选择地径2.0 cm裸根苗,通过宽窄行栽植能有效提高柳栎造林成活率,最大造林成活率高达91.86%.在出圃幼苗地径规格相同的情况下,柳栎造林成活率宽窄行栽植>行植>均匀栽植.栽植方式和出圃苗木地径规格均对造林后柳栎苗高及地径生长产生显著影响.

Dendrochronology is the study of growth rings properties, and use the rings to dating and analyze the past the science of environmental change, but the discipline connotation is not limited to determine years to a ifne living trees or log or wood, still can use rings inherent information recover or reconstruct the natural environment evolution of the historical process, using the rings s for the identiifcation of ancient buildings, ancient cultural relics, ancient art. The contents of this article are composed of four subjects. (1) A survey on dendrochronology including its definition, its research objects and its brief developing process are pointed. (2) The principles and research methods of dendrochronology are briefly described, among those, crossdating, matching of tree-ring, connection of tree-ring or bridge of tree-ring are the key technology to precise date of tree-ring. It is an important means to verify the true age and the establishment the chronology of trees history. Secondly, the ecological amplitude (sensitivity principles) are the vital principle and method for selecting desirable samples site and sample tree for researcher’s purpose. (3) Along with the extensive and deep development of this discipline, The applied ifelds has been differentiated into more secondary disciplines as follows: Tree ring chronology, dendrobiology, dendroclimatology, Tree ring ifre science, dendro-geomorphology, dendrochemistry, and dendroarcheology. Among those, a lot of achievements were obtained in dendroclimatology, taking Europe for instance, the chronology of trees history was obtained for thousands of years, from which dendrochronology is originated, and by which the history of ancient climate can be rebuilt in many areas. (4) Nowadays, the development of dendrochronology has entered a new stage, of which it is characterized by cytology level of perfect information. No longer limited to ring width as the main object of study. Moreover, the observation of naked eye will be gradually replaced by the image recognition technology.

Davidia involucrata is bract important part of reproductive organs and ornamental.In this study,the bracts of Davidia involucrata were divided into four stages according to the color and bract width ratio,and the GA3 (gibberellin) in each stage of bracts and leaves were determined by high performance liquid chromatography (HPLC),ZT (cytokinin),ABA (abscisic acid) and IAA (3-indoleacetic acid),and the dynamic changes of the ratio of the hormones were analyzed.The The aim of this study is to elucidate and reveal the role of endogenous hormones in the development of the bracts ofDavidia involucrata,which is helpful to understand the growth and development process of the bracts of Davidia involucrata,and to further study the growth and shedding genes of the bracts ofDavidia involucrata Regulate expression research to lay the foundation for research.

In order to compare quality characteristics of different batches in a Southern fresh jujube named Mid-autumn Crisp jujube comprehensive.In this study,Jujube fruits at white ripe stage and mature period were researched to analyze the content of total soluble sugar,reducing sugar,starch,vitamin C,soluble proteins and eight different mineral elements.The results showed that the nutrimental compositions presented different in distinct period.What's more,it showed a declining trend from white ripe stage to mature period.At white ripe stage,the first fruit had higher content of K,Mg,Ca,Na,Fe and Zn.Reducing sugar and vitamin C at the second fruit were the highest among the three batches of jujube.The content of soluble proteins,Mn and Cu were significantly higher than another two jujube fruits.When during mature period,the content of vitamin C,Ca and Cu of the first fruit were the highest.But for the second fruit,the percentage of esculent part of fruit is very high.And it had the highest content of total soluble sugar,reducing sugar,starch,soluble proteins.Compared with the first two batches of jujube fruits,the advantages of third fruit mainly embodied in the content of Mg,Na,Mn and Zn.

In this study,the tree age and its dominant height of Cunninghamia lanceolata plantation are firstly classified in consideration of the pure stands of Cunninghamia lanceolata in the same or similar age whose growth of dominant tree is greatly affected by site conditions.Secondly,the dummy variable will be constructed on the basis of classification of tree height and age,Finally,the polymorphic site index curve model for regional Cunninghamia lanceolata will be established,employing the non-linear regression analysis based on the dummy variable.The above research will provide new ideas and methods for evaluating forest site quality and estimating productivity in regional forest.In the same time,a new reasonable method of constructing dummy variables of tree height and age classification is also proposed and how to reasonably add the dummy variable to the model will be further studied in the research.In this study,the data of average height and age of dominant tree is taken as the study subject,which are from 606 groups of Cunninghamia lanceolata pure forest in different regions of Hunan province.In order to find the optimal basic model,the commonly used nonlinear equations as Richards,Gompertz,Korf and Mitscherlich are employed to simulate and analyze.In the purpose of finding out the ideal results of classification to construct the dummy variables,the cyclic iterative method integrated with the optimal basic model is taken to classify the tree height and age.The specific implementation steps are as follows:Firstly,setting the three-year as the initial tree age graduation,classifying the tree height of various age graduation by nine methods,then the corresponding dummy variables to different trees' classification methods will be obtained,employing non-linear regression analysis method with the dummy variables to simulate and analyze the relationship between tree height and tree age,comparing the accuracy and validity of models to find out the optimal classifying method and the ideal result of tree height.Secondly,17 kinds of different tree age classification methods and their corresponding dummy variables are obtained from the above ideal result,employing non-linear regression analysis method with the dummy variables to simulate and analyze the relationship between tree height and tree age,comparing the accuracy and validity of models to find out the optimal classifying method and the ideal result of tree-age graduation.Thirdly,the optimal corresponding dummy variable and tree-height classification are obtained from the above optimal tree-age graduation by repeating the first step.Based on the optimal dummy variable,the growth curve of the tree height and age is simulated by taking seven different methods with the dummy variable in consideration of that adding the dummy variable to different parameters' model to simulate would obtain different results.And then comparing and analyzing these simulation effects to find out the optimal model to draw the polymorphic site index curve.The model is tested by the following four indexes as the determine coefficient(R2),mean absolute error(MAE),root mean square error(RMSE) and the residual error.The first one is that the Richard equation is the optimal one by comparing and analyzing the modeling accuracy of the four kinds of non-linear models,and its expression is,whose determinant parameter R2 is 0.79964,And the second one is that the optimal dummy variable is obtained when the tree-age graduation set as five-year and the tree-height classified into nine classifications by adopting the non-linear regression with dummy variables and employing the cyclic iterative methods to analyze the model simulation accuracy and validity of different tree height classification and tree age graduation on the basis of the optimal model.And the third one is that the dummy variable added to the parameters of a、b is the optimal one by simulating seven kinds of models with dummy variables on the basis of the optimal dummy variable,whose determinant coefficient(R2),mean absolute error(MAE),root mean square error(RMSE) are 0.953 029、0.836 93、1.119 938 respectively,and the residual values evenly distribute on both sides of the horizontal axis,which shows that the validity of the model is good.In this study,the polymorphic site index curve model for Cunninghamia lanceolata of Hunan province is systematically established by employing the methods of regression analysis with dummy variables and cyclic iteration method,which not only increased the accuracy of determinant coefficients from 0.799 644 to 0.953 029,but also provide new ideas and methods for constructing the model of evaluating forest site quality and estimating productivity prediction in regional places.