2008年平顶山市常绿园林植物冻害调查及分析

2008年春调查了平顶山常绿木本植物冻害情况,结果发现,外地引进种受冻害影响较为普遍,有13种在不同程度上受害,冻害影响存在区域差异,郊区冻害比城区严重;之后分析了冻害原因,并对其引种提出建议。     

毛竹林理水固土功能评述

从毛竹林林冠对降雨的再分配功能、林下枯落物对水源的涵养功能和毛竹林地下鞭根系统固土功能等三方面对毛竹林的理水固土功能进行了简单地评述,并对该方向的研究重点提出一些自己的看法.     

观赏竹园艺栽培技术研究初探

该研究以改善生态环境为目标,围绕城市园林绿化、营造竹林景观,在安吉竹种园、上海东方绿舟、北京房山高科技园区、临安观赏竹园开展试验研究,并在浙江、上海、北京不同区域运用此项技术进行推广试验,在试验过程中,总结了观赏竹园艺栽培技术:(1)城市园林观赏竹栽培技术;(2)观赏竹盆景栽培及制作.城市园林观赏竹栽培技术包括采取堆土筑丘、改土、设置隔离层等方法创造适宜竹子生长的土壤环境,并采取搭建水平井字架,块状拉索等措施进行固竹防风,采取了全秆通梢密植法开展竹子园艺栽培,解决不同区域立地条件栽植竹子,快速形成竹林景观的技术问题,研究摸索出了一套全梢竹子挖掘、运输、整枝修剪、栽植和养护技术措施,实现竹类园艺栽培技术创新;观赏竹盆景栽培及制作包括盆景栽培、盆景养护、盆景配置等.     

Habitat selection of Guizhou golden monkey （Phinopithecus roxellanae brelichi）in Fanjing Mountain Biosphere Reserve, China

Guizhou golden monkey (Phinopithecus roxellanae brelichi) is a peculiar, rare and endangered species. It is distributed most narrowly and requires a rigorous habitat. In this study the habitats of Guizhou Golden Monkey were divided into three habitats: most suitable habitats, suitable habitats and marginally suitable habitats. The characteristics of the vegetation community, environmental factors and extreme environmental factors in the three habitats were systematically analyzed. The seasonal activity rule, activity area and the food characteristic of Guizhou golden monkey were also study at the same time. The results indicate that the evergreen and deciduous broadleaf mixed forest is the optimal living vegetation community for Guizhoug olden Monkey, and the suitable annual temperature is 8-15℃, the extremely lowest temperature is -2.5℃, the extremely highest temperature is 25℃, and the optimal living altitude is 1500-1700 m. In the same area, the higher the vegetation diversitythe more suitable it is for the life of Guizhou golden monkey. Temperature and food are the main habitat factors in determining the activity scope of the guizhou golden monkey community. The Altitude, temperature and the characteristics of the vegetation community are the main limitina factors for habitat selection.     

火力楠等3种阔叶树幼苗的养分分布格局

研究了火力楠、红苞木、大叶相思幼苗的养分分布格局。结果表明：3种树种各器官的千重排序火力楠为根＞干＞叶＞枝,红苞木为叶＞根＞干＞枝,大叶相思为干＞叶＞根＞枝。3种树种的养分浓度为N＞K＞Ca＞P＞Mg,养分总浓度大叶相思＞火力楠＞红苞木。3种树种各器官的养分总贮量排序火力楠为根＞叶＞干＞枝,红苞木为叶＞根＞干＞枝,大叶相思为叶＞干＞根＞枝。3种树种各器官中的养分贮量多为N＞K＞Ca＞P＞Mg,其养分总贮量也为N＞K＞Ca＞P＞Mg。     

新西兰林业--世界人工林经营的成功典范

本文介绍了新西兰林业的基本情况及其人工林经营的成功经验 ,并对武汉林业的发展提出了建议。     

Supercritical fluid extraction of sapogenins from tubers of Smilax china

Supercritical CO(2) fluid extraction (SFE-CO(2)) was used to extract the sapogenins after acid hydrolysis from Smilax china tubers. The influence of extraction variables, such as modifier, pressure, temperature and extraction time, were studied. SFE-CO(2) was found to produce higher yield than conventional solvent extraction. The highest yield (0.454%) of sapogenins, mostly containing diosgenin, was obtained using 35 MPa pressure, 65 degrees C and 95% EtOH as a modifier for 180 min, higher than that obtained with conventional extraction methods (0.385%).     

Genetic diversity of sea buckthorn (Hippophae rhamnoides) populations in northeastern and northwestern China as revealed by ISSR markers

As a N₂-fixing tree species, sea buckthorn (Hippophae rhamnoides) is well adapted to arid regions and is utilized for multiple purposes in China. Current knowledge of genetic variability of H. rhamnoides is limited in terms of rangewide distributions. Eleven natural populations of sea buckthorn in northeastern and northwestern China were analyzed to detect genetic variation among and within populations, by use of ISSR (inter-simple sequence repeats) markers. Using eight primers, 207 polymorphic loci were observed, ranging in size from 250 to 2500 bp. The coefficient of gene differentiation (Gst = 0.0679) showed that the total molecular variance of 11 populations was mainly existed within populations. The genetic variation within and among the 11 populations was 93.21 and 6.79%, respectively. No significant correlation between genetic and geographic distances of the populations was found using ISSR markers. Our study provides a population-level genetic profile for further investigation and conservation of genetic diversity of sea buckthorn.     

杨树微纤丝角的变异及其与木材性质的相关关系

微纤丝角为细胞次生壁S2层微纤丝排列方向与细胞主轴所形成的夹角,与木材的物理性质、力学性质和化学性质都有着直接的关系。应用x射线衍射法测定了7个杨树无性系(14株样木)胸径处各年轮的微纤丝角,并对应分析和测定了各年轮的木材基本密度、纤维长度、纤维宽度和纤维素含量。研究结果表明,杨树微纤丝角在年轮间存在显著差异,其径向变异规律为从髓心向外以微纤丝角逐渐降低,年轮间的平均微纤丝角在7.8旱?8褐洌荒静幕久芏取⑾宋ざ取⑾宋矶群拖宋睾吭谀曷旨湟泊嬖谙灾钜臁O喙胤治霰砻鳎⑾怂拷怯肽静幕久芏取⑾宋ざ取⑾宋矶群拖宋睾看嬖谙灾母合喙毓叵??0.01),相关系数分别为-0.450、-0.586、-0.516和-0.660。回归分析结果表明,多项式方程可较好地描述杨树微纤丝角与所测定的木材性质的关系,相关系数均在-0.45以上(n=125)。本文的研究结果认为,在今后针对杨树材性改良的育种计划中,微纤丝角是一个重要的选育和改良指标。图3表3参34。     

白玉兰离体培养和快速繁殖

试验建立了白玉兰离体繁殖体系。种子为外植体 ,初代培养基为 :B5 +BA0 .5mg/L +NAA0 .0 5mg/L + 30g/L糖 +琼脂 6g/L ,萌发率 85 %。继代培养基为 :B5 +BA1.5mg/L +NAA0 .15mg/L + 30g/glucose/sucrose + 6g/Lagar+Vco0 .5g/L ,月增殖率可达 5 .0± 0 .1。生根培养为 :1/2B5+NAA0 .5mg/L +AC1.0mg/L +VB2 0mg/L。以试管苗茎段、根段做外植体 ,培养基B5 +BA2mg/L+ 2 .4 -D0 .5mg/L +VC0 .5g/L ,可获得少量愈伤组织 ,继代存活率仅为 30 %。没有再分化成苗