中国落叶栎树的综合研究   总被引：11，自引：0，他引：11  

北京林业大学落叶栎树研究组 《北京林业大学学报》1988,10(3):77-83

落叶栎树是特指壳斗科标属(Qurecus L.)中的落叶种类。刘慎谔先生曾把它们称为枯叶栎。落叶栎树是温带、亚热带山区组成森林的主要树种。本文对落叶档树的分类、地理分布、叶和槲果的化学成分,木材解剖和物理力学性质进行了调查和分析测试,取得了较全面而可靠的数据,对合理开发和利用落叶栎树资源提供了科学依据。  相似文献   

蒙古栎的加工利用研究进展   总被引：1，自引：0，他引：1  

申艳梅  郭平平  刘淑玲  赵西平  梁芳 《森林工程》2014,30(5)

蒙古栎(Quercus mongolica)是一种耐干旱、耐贫瘠、耐干扰的落叶阔叶树种,主要分布于我国东北地区,为次生落叶阔叶林的主要组成树种.蒙古栎全身都是宝,木材利用率高,市场开发前景好,是实现树木全株利用的优质树种.蒙古栎作为我国主要的工业用材树种,除了木材资源的广泛利用外,蒙古栎林副产品也逐渐被开发和应用.尤其是林业剩余物利用,原料充足、用途广泛、附加值高,为全方位经营林业打开了思路和市场.本文介绍蒙古栎加工利用的最新研究进展,旨在推广蒙古栎树木全株利用技术.通过对蒙古栎木材分类加工、剩余物利用等技术进行研究,充分挖掘蒙古栎的加工利用潜质,提高经济效益和综合利用水平,为我国林业经营、木材加工和应用开发提供一些有益指导.  相似文献   

柞树单宁的提取及柞树品种间单宁含量的比较     

张娜  王斌赫  张超  姜义仁  秦利 《北方蚕业》2014,(2):18-22

本试验以辽东栎绿叶样品为材料,采用有机溶剂萃取法及分光光度法探讨了柞树单宁提取工艺,并对5种不同柞树品种的绿叶、落叶及枝条中单宁含量进行了比较。结果表明,选用80%乙醇（含1%盐酸）作提取剂,在料液比1∶15、提取时间2.5h、提取温度75℃条件下,单宁的提取量可达206.74mg/g;麻栎的单宁含量较高,绿叶期可达222.02mg/g,落叶期可达177.30mg/g,枝条单宁含量可达67.92mg/g,辽东栎、蒙古栎、锐齿槲栎及槲各有不同。  相似文献   

蒙古栎天然林单木生长模型研究:Ⅲ.单木枯死模型     

马武  雷相东  徐光 《西北农林科技大学学报(自然科学版)》2015,43(4):59-64,72

【目的】研究蒙古栎天然林的单木枯死模型,为蒙古栎天然林的合理经营提供依据。【方法】以蒙古栎天然林为研究对象,基于吉林省汪清林业局195块固定样地的2期复测数据,采用二分类的Logistic回归方法建立蒙古栎天然林的单木枯死模型。【结果】期初胸径、竞争指数、林分密度都是显著影响树木枯死的因子,林木直径是影响林木枯死的重要因子,直径越小,枯死概率越大。χ2检验结果以及ROC(Receiver operating characteristic)曲线显示,使用Logistic回归可以有效预测树木的枯死情况,所建模型较合理。【结论】建立的单木枯死模型统计可靠,可为吉林省汪清地区蒙古栎天然林的生长预测提供依据。  相似文献   

中国硬叶常绿高山栎类植物的起源与演化   总被引：2，自引：0，他引：2  

刘兴良  杨冬生  刘世荣  杨玉坡  马钦彦 《四川林业科技》2007,28(1):6-12

硬叶常绿高山栎类植物是指壳斗科栎亚属中的高山栎组(Quercus subgenus Quercus sect. B rachylepides)的8种植物和1个存疑种植物,以及巴东栎组(Quercus subgenus Quercus sect. Engleriana)的7种植物。本文依据已有的文献,综述了中国硬叶常绿高山栎类植物系统演化、化石历史和现代分布等,讨论了中国硬叶常绿高山栎类植物的起源、演化和扩展途径,为进一步系统研究和解释这类植物对高山环境的适应机制提供基础资料。  相似文献   

Endangered lowland oak forest steppe remnants keep unique bird species richness in Central Hungary     

Gábor 《林业研究》2022,33(1):343-355

The biodiversity of natural or semi-natural native,old oak woodlands have high conservation impor-tance,especially in landscapes of monocultural forest plan-tations and arable fields.With a wider variety of microhabi-tats and foraging sources,such old oak forests can provide essential habitat for native forest bird communities.We con-ducted a study using bird point counts to compare the forest bird communities of old pedunculate oak (Quercus robur)remnants with native and non-native plantations in central Hungary in a landscape of mostly arable fields,settlements,and monocultural plantations.Avian surveys were carried out in old oak forest remnants,middle-aged oak,white pop-lar (Populus alba),hybrid poplar (Populus × euramericana),black locust (Robinia pseudoacacia),and pine (Pinus spp.)plantations.Fieldwork has been carried out in nine study sites,where all six habitat types were represented (with a few exceptions),to determine total abundance,species rich-ness,Shannon-Wiener diversity,species evenness,domi-nant and indicator species,and guild abundances.We found that old oak forest remnants were the most diverse habitats among the studied forest types,while hybrid poplar and pine plantations exhibited the lowest avian biodiversity.The avian guilds most sensitive to the loss of old oak forest remnants were ground foragers,bark foragers,cavity-nest-ers,residents,and Mediterranean migratory birds.Native habitats were more diverse than non-native plantations.Our results suggest that it is important to conserve all remaining high biodiversity old oak stands and to avoid clear-cutting of monocultural plantations in favour of practices such as mixed-species plantations,longer rotation lengths,or reten-tion forestry.  相似文献   

Stones and Organic Mulches Improve the Quercus Ilex L. Afforestation Success Under Mediterranean Climatic Conditions     

María Noelia Jimnez  Emilia Fernndez‐Ondoo  María ngeles Ripoll  Juan Castro‐Rodríguez  Lynn Huntsinger  Francisco Bruno Navarro 《Land Degradation \u0026amp; Development》2016,27(2):357-365

This work studies the influence of two mulching treatments on soil properties and the field performance of afforested holm‐oak seedlings (Quercus ilex L. subsp. ballota (Desf.) Samp.) nine years after outplanting. Mulching treatments composed of stones, forest debris, and an untreated control were randomly applied to 180 seedlings (n = 60) in January 2001 at the bed level (1 × 1 m) in an abandoned agricultural field in SE Spain. Survival, growth measured by means of leaf area, and nutrient concentrations in leaves and soil were measured. Both mulches provided higher survival and greater leaf‐area growth than the control, but did not differ in leaf‐nutrient concentration. Most of the analysed soil variables were not affected by the mulching treatments at the end of the study period, and, therefore, the soil properties changes by mulching might be slower than expected under semi‐arid conditions. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献