共查询到20条相似文献,搜索用时 140 毫秒
1.
通过深圳福龙路边坡绿化方案的现场实施,介绍喷混植生技术的特点及施工工艺流程和材料参考配比,对喷混植生技术的可行性和应用后的具体情况及景观效果进行分析探讨,提出对华南地区边坡绿化采用该技术的一些看法和切身体会。 相似文献
2.
3.
4.
5.
挂网喷混植生技术在金矿废弃物边坡植被恢复中的应用 总被引:1,自引:0,他引:1
喷混植生技术在紫金山金矿废弃物边坡植被恢复中首次应用,取得了较好的效果。本文从立地条件、技术方案、施工工艺、应用前景等进行阐述与分析。 相似文献
6.
7.
公路边坡防护与生态恢复 总被引:13,自引:2,他引:11
主要论述了公路边坡植物防护的主要形式如种草、铺草皮、液压喷播植草护坡、框格防护、合成材料植被网草皮护坡、喷混植生植物护坡、绿化笼砖护坡、香根草生物边坡防护技术、客土喷播技术等,在目前,公路防护工程设计要紧紧抓住设计对象的土质、水文、气候等特点,灵活采用不同的防护型式,确保公路边坡的可持续性。 相似文献
8.
液压喷播在黄土地区边坡植被建植中的应用研究 总被引:1,自引:0,他引:1
液压喷播技术是从国外引进的边坡快速绿化播种工程技术,目前在我国南方得到大规模应用,但在水土流失较为严重的黄土地区应用效果不理想。为解决黄土地区喷播植被群落建设问题,开展了微环境改良技术(土壤改良、覆盖改良)、植物选择与配比、边坡坡向等不同处理措施对植被建植的影响研究。结果表明:边坡开挖水平阶截持水分量是未处理的1.75倍,初始植株保存数量较未处理高82.5%;覆盖稻草与遮光网下的截持水量是覆盖无纺布的1.14倍与1.71倍,最高,遮光网与无纺布覆盖下初始植株保存数量分别为麦草覆盖下的43%与52%;麦草比无纺布覆盖下植被盖度高5%~23.7%;柠条+外来草种与唐古特白刺+本地草种当年生长季末盖度可分别达到59%和56.5%,第2年为52.5%和77.5%。研究指出,黄土地区边坡土壤可蚀性强,喷播层易于流失,干旱、盐碱性突出等因素是造成喷播植被难以建成的主要原因,进行微环境改良、选择乡土灌木+乡土草种组合可以成功建植液压喷播植被,实现持续效果。 相似文献
9.
10.
液压喷播植草护坡机械化程度高、速度快、效果好、适应性广,是一种快速建立绿化草坪的植草护坡方法。选择广东省飞来峡水利枢纽工程开挖的典型坡面为试验区,研究了液压喷播技术在植草护坡中的应用。结果表明,液压喷播植草护坡的成坪速度主要受草籽的生态学特性、种子萌芽条件及生长环境等因子的影响,即与草籽种类、植物生长调节试剂及土壤状况与气候条件等因子密切相关。 相似文献
11.
我国滑坡、崩塌的区域特征、成因分析及其防御 总被引:2,自引:0,他引:2
论述了我国滑坡、崩塌的区域分布特征,滑坡和崩塌的危害程度,滑坡和崩塌类型和成因分析,并且提出了灾害的防御措施,以期达到环境保护成为社会发展过程中的一个重要组成部分。 相似文献
12.
安阳市近10年来建成的水土保持工程的主要建设管理方式可分为3种,即:乡村组织治理,完成后分配给农户分散经营;乡村组织治理,由村成立专业队代表村集体管理;把小流域或荒山承包给个体或私人经济组织,由其自行治理和经营管护。3种建管方式中以后者为最优,其经济效益是分散经营管理的5倍、专业队经营管理的3.5倍。针对水保工程建设管理中存在的问题和适应农村税费改革等要求,提出了加快安阳市水保生态建设的建议。 相似文献
13.
Much evidence has indicated that the occurrence of montmorillonite and vermiculite containing Al-interlayers is very common in solis, particularly acid soils. Viewed in the light of soil clay minerology, it would be required to investigate the properties of their original minerals. For the latter purpose, the Al-interlayer has been removed prior to the Mg-glycerol,K-saturation and heating tests for identification of montmorillonite and vermiculite. Its removal has been accomplished in sevsral ways; KOH plus KCl (1), NH4F, KCl plus HCl (2), Na-citrate (3),400C de hydroxylation-NaOH (4) dissolution. Although these methods are effective for the removal of Al-interlayers, they seem drastically to affect the minerals or are time-consuming. Inthe course of the study of hydroxy-Al interlaid complexes of expanding 2:1 layer lattice clay minerals, the authors have noticed the difference between the (001) spacings of hydroxy-Al complexes of montmorillonite and vermiculite; the former exhibited the 20 A basal spacing at room temperature against the 14 A spacing of the latter. This difference might be useful for differentiating montnmorillonite-chlorite intergrades in soils. 相似文献
14.
为探讨硒、钴在提高苜蓿生长影响,在河南省沿黄滩区,开展了硒、钴单施和配施下对紫花苜蓿生长以及产量和品质影响研究。结果表明,硒、钴单施和配合基施均能够显著提高苜蓿从现蕾到开花期的净光合能力,降低呼吸消耗,提高单位叶面积干物质的生产速率,有利于苜蓿花前青干草生产和果实发育;其中,以硒570 g/hm2、钴762g/hm2配施下效果显著,青干草增产8.06%,种子千粒重可提高12.85%。单施钴和硒钴配施还能促进0—20 cm耕层苜蓿根瘤菌的生长和积累,增强苜蓿的固氮能力。说明硒钴合理基施对苜蓿青干草和优质种子生产具有很好的应用效果。 相似文献
15.
16.
开发建设项目水土保持设施竣工验收程序和方法 总被引:2,自引:1,他引:2
开发建设项目水土保持设施的竣工验收 ,要严格遵循水利部《开发建设项目水土保持设施验收管理办法》 ,坚持验收合格的 4条标准 ,由具备资质的机构进行验收前的技术评估 ,验收程序和方法要符合国家验收规程的规定与要求 相似文献
17.
18.
19.
Separation and analysis of diastereomers and enantiomers of cypermethrin and cyfluthrin by gas chromatography 总被引:5,自引:0,他引:5
Synthetic pyrethroid (SP) insecticides are of environmental significance because of their high aquatic toxicity. Due to their chirality, SP compounds contain multiple diastereomers and enantiomers. However, due to great structural similarities and lack of isomer standards, gas chromatographic (GC) analysis of SP diastereomers or enantiomers is poorly developed. In this study, we used a HP-5 column to separate the diastereomers and a beta-cyclodextrin-based enantioselective column (BGB-172) to separate the enantiomers of cypermethrin (CP) and cyfluthrin (CF). Resolved peaks were identified by comparing chromatograms of isomer-enriched CP products. Diastereomers of both CP and CF were separated on the HP-5 column. On the BGB-172 column, enantiomers of all cis diastereomers were separated, while those of trans diastereomers were not separated. The elution order appears to be regulated by configuration, a finding which may allow peak identification in the absence of isomer standards. When coupled with electron capture detection, the developed methods had low detection limits and may be used for analysis of SP diastereomers and enantiomers in environmental samples. 相似文献
20.
Experiments were conducted to study the influences of synthetic bayerite, non-crystalline aluminum oxide (N-AlOH), goethite, non-crystalline iron oxide (N-FeOH) and kaolinite on the adsorption, activity, kinetics and thermal stability of invertase. Adsorption of invertase on iron, aluminum oxides fitted Langmuir equation. The amount of invertase held on the minerals followed the sequence kaolinite > goethite > N-AlOH > bayerite > N-FeOH. No correlation was found between enzyme adsorption and the specific surface area of minerals examined. The differences in the surface structure of minerals and the arrangement of enzymatic molecules on mineral surfaces led to the different capacities of minerals for enzyme adsorption. The adsorption of invertase on bayerite, N-AlOH, goethite, N-FeOH and kaolinite was differently affected by pH. The order for the activity of invertase adsorbed on minerals was N-FeOH > N-AlOH > bayerite > reak goethite > kaolinite. The inhibition effect of minerals on enzyme activity was kaolinite > crystalline oxides > non-crystalline oxides. The pH optimum of iron oxide- and aluminum oxide-invertase complexes was similar to that of free enzyme (pH 4.0), whereas the pH optimum of kaolinite-invertase complex was one pH unit higher than that of free enzyme. The affinity to substrate and the maximum reaction velocity as well as the thermal stability of combined invertase were lower than those of the free enzyme. 相似文献