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粤北地区光皮树种质资源生态调查及其开发利用 总被引：6，自引：4，他引：2
光皮树是我国新发掘的一种珍稀、优质、理想的多用途乡土木本油料树种,尤其适合石灰岩山地种植,是石漠化地区良好的生态恢复造林树种。根据2008和2010年对粤北地区（主要在乐昌县境内）进行的两次资源调查结果,发现粤北地区光皮树资源亟待保护。现存光皮树的分布类型主要包括树龄在200年以上的散生古树、天然小群体和人工小群体三种类型。以生长和果实产量为主要目标经济性状,共收集粤北地区光皮树种质资源45份。根据文献资料以及最新试验数据,文章对光皮树的开发利用进行了总结和探讨。 相似文献
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本文对生物柴油树种进行了筛选与评价,认为珍稀树种、优质干果树种、出种率低的树种、优质食用油料树种、大面积造林具有困难的树种不宜选作生物柴油树种.初步筛选文冠果、花椒、黄连木、乌桕、油桐、光皮树、麻疯树、绿玉树、椰子、油棕等10种作为生物柴油树种.分别对以上树种的形态特征、生态习性、苗木培育、栽植方法、病虫害、自然分布、种子产量、利用年限、目前的应用、含油量、提炼的生物柴油性质及与0号石化柴油燃料特性对比等做了调查和评价.对生物柴油树种发展的制约因子如黄连木种子小蜂、文冠果"千花一果"、麻疯树等产生的有毒物质进行了探讨.以花椒为例,对生物柴油林的经济效益进行了评估. 相似文献
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引言海南岛热带树种资源丰富,各树种特性不同,苗木生长速度差异极大。了解苗木生长速度,掌握苗木生长规律,可为苗期试验,决定造林苗木的播种季节等提供依据。笔者于1963—1965年、1973—1983年在海南岛尖峰岭热林所苗圃进行苗木生长规律研究。共作了69个树种299种次的苗木生长过程观察,取得了25万多个观察数据,初步掌握了热带树种苗木生长规律,现将资料整理如下。一、研究材料和方法研究所用苗木均为用种子繁殖的裸根实生苗。所用种子大部分采自海南岛尖峰龄、坝王岭和吊罗山等三大林区以及屯昌县、崖 相似文献
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粤北石灰岩山地的造林树种及造林技术 总被引：8，自引：1，他引：7
通过调查和种植试验，选出了１０种适合粤北石灰岩山地造林绿化树种，并将其中经济价值较高的任豆、菜豆树、光皮树、柏木、阴香５个树种分别介绍其生长特性和育苗、造林技术。 相似文献
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This study examined the effects of framework trees, planted in 1998, and bird community on the natural recruitment of tree
seedling species in a forest restoration experiment designed to test the framework species method of forest restoration established
by Chiang Mai University’s Forest Restoration Research Unit (FORRU-CMU). Tree seedlings establishing beneath five framework
tree species: Erythrina subumbrans (Hassk.) Merr., Hovenia dulcis Thunb., Melia toosendan Sieb. & Zucc., Prunus cerasoides D.Don and Spondias axillaries Roxb., were surveyed. Five trees of each species were selected in the 8-year-old trial plots. Birds visiting each tree were
observed to determine possible seed dispersal activities. Thirty-six tree seedling species were found beneath the selected
trees, of which 11 were wind-dispersed and 25 were animal-dispersed. The population density of animal-dispersed tree seedlings
was higher than the wind-dispersed seedlings beneath all selected framework trees. The sample plots beneath P. cerasoides supported the highest population density of tree seedlings. Forty-nine bird species were recorded visiting the framework
trees between July 2006 and June 2007. Non-frugivorous birds were recorded more frequently than the frugivorous birds. The
effects of birds on seedling recruitment were different among each of the selected framework tree. Bigger trees, which attracted
high number of birds by providing food resources, roosting and nesting sites may increase the seed deposition more than smaller
trees with fewer attractants. 相似文献
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我国林木良种繁育现状及发展趋势 总被引：5，自引：0，他引：5
文章对我国林木良种繁育的现状及发展趋势进行了综合评述。从８０年代起,我国进行了大规模的林木良种基地建设,并对４０多个主要造林树种,开展了不同水平的遗传改良,取得了显著成效。林木良种繁育工作,充分利用种源、林分和个体选择的结果,按照自然区划和树种特点,建立不同层次的种子生产基地。当前存在的主要问题是园址选择不尽合适,繁殖材料选择、配置不当,经营管理粗放,产量较低,在种子园建设中,对实生种子园有所忽略 相似文献
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25种优良阔叶树种育苗技术研究 总被引：4，自引：2，他引：2
通过对吉安双江林场和南昌树木园3年生25个优良阔叶树种的育苗试验,表明采用常规育苗方法可培育出供生产用的合格苗木,但各树种在育苗时的种子催芽方法不尽相同,播种时间有所差异,同时对苗木的根系及苗木的产苗量进行了初步的探讨。 相似文献
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《林业研究》2016,(2)
We studied seed germination and early seedling growth of Pinus densata to explore the range of variability within the species and to inform afforestation practices.Phenotypes were evaluated at a forest tree nursery under conditions that support Pinus yunnanensis, one of the presumed parental species of P. densata. Seeds were collected from 20 open-pollinated trees within each of eight autochthonous populations representing the natural distribution of P. densata in China to assess variation in germination traits and early seedling growth, and to examine the relationships among these traits. Results showed that seeds from all populations germinated and seedlings established successfully. There were significant differences among populations in 13 of 14 traits evaluated. Seed germination and early seedling growth were strongly related to seed size and seed weight. Bigger seeds germinated earlier and faster than small seeds, and seedling size was positively correlated with seed size. Some germination traits were strongly and significantly correlated with climatic variables associated with the provenance of the studied populations. Based on these observations, we conclude there were large, significant, and biologically important differences among P. densata populations in seed germination and seedling growth traits. The observed variability probably reflects a high degree of adaptive differentiation among populations that is likely to be relevant for future afforestation. 相似文献
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ZHANG Yan-hua SUN Li-fu Ken C. Hodgkinson 《林业研究》2005,16(4):306-310
桉属植物是澳大利亚景观中的主要的乡土植物类群。在欧洲人定居澳大利亚以后,新南威尔士州台地的桉树急剧减少,桉树更新停滞,景观生态系统很难恢复到原初状态。本文介绍了桉树和乡土灌木减少的历史背景,分析了在这一地区幼苗更新减少的原因主要是由于开垦、放牧、火烧、外来物种竞争、枯萎、昆虫和干旱等,总结了桉树更新的可能条件,如幼苗存活的合适条件、充足的种子供应、避免捕食、适当的萌发条件、无放牧环境、机械处理、杂草控制、火烧系统和疾病控制等,借以建议在该地区应怎样保护和促进桉树的更新。参26。 相似文献
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Prunus cerasoides D. Don has been identified as a framework species for restoring evergreen forest in seasonally dry climates. The aim of this study was to develop criteria to select parent trees for supplying seed to forest restoration projects based on seedling performance in the nursery and in the field. Seed progenies were collected from 50 individual parent trees; 13 in Doi Inthanon National Park; 14 in Doi Ang Khang; and 23 in Doi Suthep-Pui National Park. Criteria were developed for the selection of superior parent seed trees based on nursery and field performance, and a provisional selection of parent seed trees for forest restoration projects has been made based on these criteria. Four standards for selection of superior seed trees were recognised: (i) 70% or greater seedling survival in the field, (ii) a seedling height of 100 cm or taller after the first growing season in the field, (iii) 40% or greater germination in the nursery and (iv) 70% or higher seedling survival in the nursery. Twenty one seed trees met these standards. 相似文献
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枫香人工育苗技术研究 总被引：2，自引：0，他引：2
采用随机区组设计了枫香不同年龄母树种子品质、不同播种时间(春播、冬播)和不同播种方式(条播、撒播)试验,进行枫香不同育苗方式对比研究。结果表明:不同年龄枫香母树种子产量和种子品质存在显著差异,20年生枫香母树种子千粒重、出籽率及发芽率分别均高于40年生枫香母树种子,因此枫香育苗宜选择20~30年生健壮无病虫害的母树采种。不同播种时间育苗的苗木生长和苗木质量无明显差异,春播苗木生长及苗木质量略优于冬播苗木。枫香条播与撒播育苗苗木生长和苗木质量无明显差异,但条播节省种子。因此枫香育苗宜采用条播,1年生幼苗发育可分为出苗期、幼苗期、速生期、苗木硬化期4个时期。 相似文献
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The effects of microhabitat (shrubs and herbs), plant litter, and seed burial on the regeneration of Liaodong oak (Quercus wutaishanica Mayr) and Chinese pine (Pinus tabulaeformis Carr.) were studied in three typical stands (Liaodong oak forest, Chinese pine plantation, and grassland) in the Loess Plateau, China. We monitored the establishment and growth of seedlings of these two woody species in sown experimental plots, in which shrubs and herbs, plant litter, and seed burial were manipulated. In the grassland, shrubs and herbs facilitated Liaodong oak establishment, with no effect on the establishment of Chinese pine. In the two forest stands, shrubs and herbs primarily had an inhibition effect on the establishment of these trees. The effects of plant litter were facilitation or inhibition, depending on the target species and the habitat. Seed burial had a positive effect on seedling establishment. In all three habitats, shrubs and herbs had inhibition effects on seedling growth of both tree species. Plant litter and seed burial did not influence seedling growth in either species. Liaodong oak and Chinese pine use different regeneration strategies during early stages of succession and similar strategies during late stages of succession. 相似文献