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1.
姜科植物花色艳丽、花型奇特、芬芳馥郁,在园林绿化中具有较大的开发利用价值;通过对福州市园林绿地中姜科植物的资源和应用情况进行调查和分析,探讨了姜科植物的资源、开发利用价值和园林应用形式,以期为姜科植物的引种、开发利用和园林应用提供理论依据和实践指导。  相似文献   

2.
阐述了开发利用能源植物的意义,分析了能源植物的开发利用现状以及山西省发展林业能源植物的有利条件,并对山西省开发利用林业能源植物提出了相关建议。  相似文献   

3.
国内外能源植物的开发利用   总被引:12,自引:0,他引:12  
本文就能源植物的概念、类型以及国内外开发利用状况进行了分析和讨论,提出了我国能源植物开发利用的问题与建议.  相似文献   

4.
本文综述了甘肃干旱荒漠区植物资源的地理分布特征、种类构成、资源类型及其开发利用现状,分析了存在的问题,展望了荒漠植物资源开发利用前景。认为甘肃干旱荒漠区蕴藏着较为丰富的荒漠植物资源,从科、属、种总体来看分别占我国干旱荒漠植物的67.07%、47.11%和31.87%。这些荒漠植物资源在食用、药用、工业原料、防护和改造环境方面具有很高的生态、经济和开发利用价值,对发展甘肃地方经济和维系荒漠化区域生态安全及环境保持具有十分重要的意义。  相似文献   

5.
植物源农药的研究概况及其在新疆开发利用的前景   总被引:6,自引:0,他引:6  
根据国内外植物源农药研究的现状和植物资源特点,分析了植物源农药在新疆开发利用的广阔前景,并指出在开发利用植物资源的同时应根据新疆气候条件恶劣,生态环境脆弱的特点,优先考虑保护生态环境,合理地利用植物资源,避免盲目开发、过度利用。  相似文献   

6.
早春植物在美化北方城市中的作用   总被引:3,自引:0,他引:3  
本针对城市在生态环境建设中地被植物种类单一化的问题,提出了开发利用当地早春植物,使植物种类多样化、增加可观赏性。并推荐了几种常见的、有开发利用价值的早春植物。  相似文献   

7.
新疆柽柳属植物的价值及开发利用建议   总被引:4,自引:0,他引:4  
文章概述了新疆柽柳属植物开发利用的生态价值和经济价值,并提出了相关建议,为新疆柽柳属植物的进一步开发利用提供参考。  相似文献   

8.
山西霍山植物资源的开发利用与保护对策   总被引:1,自引:0,他引:1  
通过对霍山多种植物类别资源的分布、生境、组成的研究,详细分析了植物资源的种类及开发利用前景,从植被生态学、生态经济学和环境科学等多学科、广角度出发,为维护生态平衡,促进周边地区可持续发展以及植物资源的开发利用、改造和保护提供科学依据。  相似文献   

9.
中国木犀属(桂花属 Osmanthus)植物的研究概况和开发利用   总被引:3,自引:0,他引:3  
彭国全  季梦成 《江西科学》2004,22(3):221-226
总结了中国木犀属植物研究的历史、现状,以及开发利用的价值,并就该属植物的研究重点及开发利用提出建议。  相似文献   

10.
为当前我场植物资源开发利用提供参考意见.在简要回顾我场植物资源开发利用所取得的成果的基础上,就当前各种植物资源的利用问题进行规划.当前我扬在各种植物资源开发利用方面已取得可喜成果,但还存在不足和误区,还有很强的潜力与后劲,各种植物资源开发利用前景广阔.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

15.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

16.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

17.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

18.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

19.
Quality traits in wheat (Triticum aestirum L.) were studied by quantitative trait locus (QTL) analysis in a recombinant inbred line (RIL) population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross (ChSh). Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.  相似文献   

20.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

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