共查询到19条相似文献,搜索用时 944 毫秒
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能源植物资源研究进展 总被引:7,自引:0,他引:7
能源植物是一种重要的可再生能源。随着化石能源的日益紧张,能源植物的利用受到人们日益关注。我国能源需求量大,化石能源相对贫乏,十分有必要开发能源植物资源。我国植物资源十分丰富,为开发能源植物资源提供了良好的物质基础。 相似文献
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继1982年国务院环境保护办公室和中国科学院植物研究所将我国354种植物列为国家重点保护植物之后,国家环保局和中国科学院植物研究所又提出了第二批国家重点保护植物381种,其中分布在内蒙古的有20种,加上第一批分布于我区的24种,现在我区共有国家级重点保护植物44种。为了更好地宣传和保护这些植物资源,现将第二批保护植物简介如下: 相似文献
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资源植物是指对人类有开发利用价值的植物,大兴安岭是我国植物资源最富含的地区之一。文章查阅大量文献并结合实际经验,简明介绍了该地区几种典型植物资源。 相似文献
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资源植物是指对人类有开发利用价值的植物。大兴安岭地区是我国植物资源最富含的地区之一。文章通过查阅大量文献并结合实际经验,简明介绍了该地区几种典型植物资源。 相似文献
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我国森林珍稀濒危植物的保护 总被引:2,自引:0,他引:2
一、我困森林植物资源概况 我国地域辽阔,地形地貌复杂,自然条件多样,从南到北跨越热带、亚热带、暖温带、温带和寒温带共5个气候带,从东到西拥有平原、丘陵、高原和山地等多种地貌类型,而它们海拔高度相差8000多米。由于不同气候、不同地貌和不同水热的组合条件,孕育了我国丰富的植物资源,形成了山岳森林型、海滨森林型、沙漠森林型、 相似文献
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深圳洪湖公园水生植物的配置 总被引:3,自引:0,他引:3
通过对深圳洪湖公园水生植物配置的调查,介绍了该公园的植物种类、配置方式,并以此为例系统论述了水生植物配置的特点、生态功能及景观价值等。提出了洪湖公园水生植物应用配置上存在的问题及解决方法。 相似文献
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文章对大连地区植物造景进行调查,介绍了该区栽培植物的种类、特点及植物配植应用现状,并结合科学的植物造景原则和美学原理,对盐碱地城市不同类型用地的植物景观进行评价。 相似文献
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广州地区主要草本园林植物检索表 总被引:1,自引:0,他引:1
本文对广州地区常见的草本园林植物按一、二年生草本园林植物,宿根草本园林植物,蕨类植物,水生园林植物,草坪及地被园林植物,肉质多浆及仙人掌类植物七大类编制了分种检索表。 相似文献
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在对齐云山的野生观赏植物进行多年调查研究的基础上,筛选出了具有观赏价值的野生植物402种(包括种下分类单位),隶属118科304属,划分为绿化及风景植物、花卉植物、草坪及绿篱植物、垂直绿化植物和树桩盆景植物5大类,并对齐云山的野生观赏植物的保护及开发利用提出了建议。 相似文献
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合理开发观果植物并应用于城市园林绿化具有积极的意义。文中总结了适宜在南宁市推广应用的观果植物,并提出合理开发、利用的建议。
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Seasonal fluctuations of starch in root and stem tissues of coppiced Salix viminalis plants grown under two nitrogen regimes 总被引:1,自引:0,他引:1
Seasonal changes in starch were studied at the tissue and cellular levels in roots and stems of Salix viminalis L. cuttings. Cuttings were planted in pots containing sand and grown in a controlled environment chamber in which seasons were artificially induced by changes in temperature and photoperiod. Nitrogen was supplied at optimum and low rates, and during dormancy, one-half of the plants were decapitated. Starch concentrations in root and stem tissues were determined regularly during shoot extension growth, dormancy and resprouting after dormancy. We used light microscopy (LM) combined with image analysis (IA) to determine the cellular localization and amount of starch in different cell types of stem and root tissues. Chemical analysis confirmed that starch concentrations were lower in plants receiving a high-N supply rate than in plants receiving a low-N supply rate. In all plants, the highest concentration of starch was in the roots. Light microscopy and IA showed that starch accumulated mainly in the phloem and cortical cells of both root and stem tissues. Starch grains were also regularly found in ray parenchyma cells. The amount of starch as well as the size of the grains showed strong seasonal fluctuations. In both roots and stems, starch concentrations were highest during predormancy and lowest during periods of shoot extension growth. At the time of resprouting, root cells of decapitated plants were more depleted of starch than root cells of intact plants, supporting the hypothesis that starch reserves in roots are important during the early phase of resprouting in coppice systems. 相似文献