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衡水市立体绿化现状与植物选择 总被引：1，自引：0，他引：1
以衡水市立体绿化为研究对象,通过实地调查的方法,对立体绿化植物种类、应用类型、绿化方式和景观效果等方面进行调查,得出衡水市立体绿化建设存在规模极小,植物种类单调,应用方式单一等问题,为此提出通过研究和引进新型绿化形式,充分发掘利用垂直绿化植物等措施改善城市绿化不足. 相似文献
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2009年5～8月对衡水湖湿地防护林带的鞘翅目昆虫进行了初步调查.整理记录到鞘翅目昆虫20科90种,种类较多的科有瓢甲科14种,象甲科12种,叶甲科10种,是衡水湖防护林带的鞘翅目优势科,共占调查总种数的40.00%.概括分析了防护林的主要危害种类,提出了防治建议. 相似文献
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《嘉应学院学报》2020,(3):48-54
采用实地调查、文献资料等方法调查了世界客都城区蓝色花卉植物的种类、属性及其利用现状.结果表明:客都城区共有蓝色花卉植物16科、31属、35种,分别占该区域植物总数的6.9%、3.5%、1.5%.其中草本28种,占80%;灌木4种,占11.4%;草本或亚灌木1种,占2.9%;灌木或小乔木1种,占2.9%;乔木1种,占2.9%. 35种蓝色花卉植物中,野生种类11种,栽培种类17种,栽培或野生种类7种.客都城区蓝色花卉植物的4种典型花色为蓝色、深蓝色、淡蓝色和蓝紫色;唇形科、马鞭草科和菊科为客都城区蓝色花卉植物的优势科;大部分蓝色花卉植物的花期在3月～8月;客都城区蓝色花卉植物的地理区系类型以泛热带分布为主.编制的客都城区蓝色花卉植物名录,可为客都及其附近地区的植物景观设计、园林绿化提供参考与指导. 相似文献
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在形形色色的被子植物中 ,约 10 %靠风力传粉、极少数靠鸟和水传粉 ,绝大多数的种类皆靠昆虫传粉。昆虫来往于花丛之间 ,或是为了采食花粉、花蜜 ;或是为了在花中产卵 ,或是以花朵为栖息场所 ,传粉纯属它们的无意行为。虫媒花植物往往是花冠大而显著、色彩鲜艳、有特殊的气味、能分泌蜜汁以吸引昆虫 ,花粉粒一般比风媒花大 ,外壁粗糙。传粉的昆虫有蜂类、蝶蛾类、蝇类、甲虫类等多种类型 ,它们和各类植物在长期的演化过程中互相适应和选择 ,形成了各自的传粉特色。下面以堇菜科植物三色堇为例 ,剖析虫媒植物的花在传粉过程中与昆虫的辩证关… 相似文献
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南阳市园林植物灯下昆虫群落结构分析 总被引：1，自引：0，他引：1
通过对南阳市园林绿地植物7~8月份诱虫灯下昆虫群落的调查,摸清了其常见的昆虫种类,结果表明：园林绿地植物灯下昆虫群落包括5个目,21科,50种;其中有害虫45种,害虫天敌4种和杂食性昆虫1种.同时,根据害虫的发生数量及对园林绿地植物的危害程度,从群落的角度分析了园林绿地植物害虫的优势种（类）,主要有暗黑鳃金龟、淡剑夜蛾、茶长卷蛾、斜纹夜蛾、土蝽等;从生态功能分类的角度把这些绿地害虫分为植食性昆虫、肉食性昆虫、传粉昆虫、杂食性昆虫4大类,其中这些害虫主要来自于鳞翅目、同翅目、直翅目、鞘翅目、半翅目五个目,为园林绿地植物在群落水平上进行综合治理提供了理论依据. 相似文献
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园林铺装是园林景观的一个重要构成要素．本文通过对其表现、功能性、生态性等不同角度的分析,结合衡水市怡水公园的相关情况进行了探讨．对园林铺地的设计提出了可行性的建议。 相似文献
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芳香植物集绿化、美化和香化于一身,是重要的园林设计要素之一,其极富变化的季相景观为城市园林绿化增添了无穷意境。衡水市早春开花的芳香植物70%为蔷薇科,其中桃属、李属占蔷薇科总数最多,均为21%;其花期多集中在4月中旬,达5-60天;花色多为浅色淡香;生活型多为落叶乔木和灌木,分别占60%和20%,草花数量较少,仅占5%。由调查得知早春开花的芳香植物种类少,品种单一,可借鉴知名园林绿化场所的配置,与实际情况结合,提高衡水园林绿化上的整体水平。 相似文献
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本文通过对河西走廊地区明长城沿线种子植物调查,共统计到种子植物26科79属107种,其中裸子植物1科1属1种;被子植物25科78属106种.单种属的科共12个,超过10属的科3个,其总属数占调查总属数的45.6％,种数占调查总种数的51.4％,以藜科最多,共13属21种.科的区系分布类型共4个正型和3个变型.属的区系分布类型共12个正型和9个变型,中国特有属1个,即菊科的河西菊属(Hexinia).调查区域的植物种类相对单一;地理成分比较单一,以地中海地区、西亚至中亚分布型和北温带成分为主;发现珍惜濒危植物4种,一级保护植物1种,其余均属二级保护.这些结论为利用植物因素保护长城选择适宜的植被类群和代表性物种提供了一定的理论依据. 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献