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Discussion on the Prevention and Control Countermeasures of Sudden Disasters on Protected Vegetable in Hebei Province 被引量:1
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作者 刘云 梁玉芹 +1 位作者 王灵敏 宋炳彦 《Agricultural Science & Technology》 CAS 2016年第3期511-515,共5页
Protected vegetable production made the traditional agriculture gradually get rid of the shackles of nature, broke the seasonal traditional agriculture and realized the anti season list of agricultural products. While... Protected vegetable production made the traditional agriculture gradually get rid of the shackles of nature, broke the seasonal traditional agriculture and realized the anti season list of agricultural products. While protected vegetables often encountered sudden disasters in production and were restricted with the conditions of low temperature and weak light. Aimed at the sudden disasters of protected vegetable production in Hebei Province,the countermeasures for disaster prevention and control were put forward from the aspects of variety selection, seedling treatment technology,grafting technique,cultivation and management,flower and fruit retention technology,application of exogenous substance,rational fertilization,transgenic technology and so on,in order to reduce production risks and cut loss,realize that protected vegetable production is safe,good-quality and efficient. 展开更多
关键词 Hebei Province protected vegetable Sudden disasters Prevention and control countermeasures
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Research Progress of Eco-Friendly Portland Cement Porous Concrete:A Review
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作者 Xin Cai Fan Li +4 位作者 Xingwen Guo Ren Li Yanan Zhang Qinghui Liu Minmin Jiang 《Journal of Renewable Materials》 SCIE EI 2023年第1期103-130,共28页
With the great impetus of energy conservation and emission reduction policies in various countries,the proposal of concepts such as“Sponge City”and“Eco-City”,and the emphasis on restoration and governance of ecolo... With the great impetus of energy conservation and emission reduction policies in various countries,the proposal of concepts such as“Sponge City”and“Eco-City”,and the emphasis on restoration and governance of ecological environment day by day,portland cement porous concrete(PCPC),as a novel building material,has attracted more and more attention from scientific researchers and engineers.PCPC possesses the peculiar pore structure,which owns numerous functions like river embankment protection,vegetation greening as well as air-cleaning,and has been of wide application in different engineering fields.This paper reviews the salient properties of PCPC,detailedly expounds the research progress of domestic and foreign literature about this subject in the past ten years(2010–2020),conducts the statistical analysis of the distribution rule of its major properties around the world,combines with the engineering application to summarize the excellent properties of PCPC,and makes a forecast of future research direction. 展开更多
关键词 Portland cement porous concrete(PCPC) penetrating quality mechanical properties DURABILITY PHOTOCATALYSIS endothermic function slope protection with vegetation
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Slope Protection with Vegetation of Baoji(Shaanxi)-Hanzhong(Shaanxi) Expressway
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作者 徐宣斌 《Agricultural Science & Technology》 CAS 2015年第1期151-159,175,共10页
With expressway development and environment protection consciousness improving, slope protection technology with vegetation has drawn much more attention. From the perspective of ecology, Baoji-Hanzhong Expressway max... With expressway development and environment protection consciousness improving, slope protection technology with vegetation has drawn much more attention. From the perspective of ecology, Baoji-Hanzhong Expressway maximized slope protection technology with vegetation and formed attracting landscapes on basis of eco-protection. This research introduced the technology of Baoji-Hanzhong Expressway, and explored a low-cost and effective biological slopeprotection way, suitable for Baoji-Hanzhong Expressway, according to slope protection technologies, at home and abroad, with botany, water and soil conservation engineering, and architecture, which fixed and stabilized slopes, prevented rainfall scouring, and advanced slope protection development in China. 展开更多
关键词 Slope protection with vegetation Eco-landscape Ecological restoration EXPRESSWAY
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An Exploratory Analysis of Vegetation Strategies to Reduce Shallow Landslide Activity on Loess Hillslopes, Northeast Qinghai-Tibet Plateau, China 被引量:46
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作者 HU Xia-song BRIERLEY Gary +5 位作者 ZHU Hai-li LI Guo-rong FU Jiang-tao MAO Xiao-qing YU Qin-qin QIAO Na 《Journal of Mountain Science》 SCIE CSCD 2013年第4期668-686,共19页
Heavy summer rainfall induces significant soil erosion and shallow landslide activity on the loess hillslopes of the Xining Basin at the northeast margin of the Qinghai-Tibet Plateau. This study examines the mechanica... Heavy summer rainfall induces significant soil erosion and shallow landslide activity on the loess hillslopes of the Xining Basin at the northeast margin of the Qinghai-Tibet Plateau. This study examines the mechanical effects of five native shrubs that can be used to reduce shallow landslide activity. We measured single root tensile resistance and shear resistance, root anatomical structure and direct shear and triaxial shear for soil without roots and five root- soil composite systems. Results show that Atriplex canescens (Pursh) Nutt. possessed the strongest roots, followed by Caragana korshinskii Kom., Zygophyllum xanthoxylon (Bunge) Maxim., Nitraria tangutorum Bobr. and Lycium chinense Mill. Single root strength and shear resistance relationships with root diameter are characterized by power or exponential relations, consistent with the Mohr- Coulomb law. Root mechanical strength reflects their anatomical structure, especially the percentage of phloem and xylem cells, and the degree and speed of periderm lignifications. The cohesion force of root- soil composite systems is notably higher than that of soil without roots, with increasing amplitudes of cohesion force for A. canescens, C. korshinskii, Z. xanthoxylon, N. tangutorurn and L. chinense of 75.9%, 75.1%, 36.2%, 24.6% and 17.0 % respectively. When subjected to shear forces, the soil without root samples show much greater lateral deformation thanthe root-soil composite systems, reflecting the restraining effects of roots. Findings from this paper indicate that efforts to reduce shallow landslides in this region by enhancing root reinforcement will be achieved most effectively using A. canescens and C. korshinskii. 展开更多
关键词 Arid environments Shallow landslide Vegetative hillslope protection Root-soil compositesystems Tensile strength Root reinforcement
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Mechanical analysis of interaction between plant roots and rock and soil mass in slope vegetation 被引量:7
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作者 言志信 宋云 +1 位作者 江平 王后裕 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2010年第5期617-622,共6页
With the help of plant roots, slope vegetation makes the slope soil mass become a composite material of soil and roots, and thus enhances shear strength of the slope soil mass and stability of the slope. However, the ... With the help of plant roots, slope vegetation makes the slope soil mass become a composite material of soil and roots, and thus enhances shear strength of the slope soil mass and stability of the slope. However, the related studies at present are still qualitative. In this paper, quantitative analysis of the interaction between roots and soil mass are made. By the analysis of the interaction between herbaceous plant roots including lateral roots of woody plants and rock and soil mass, a mechanical model of the interaction between frictional roots and soil is established, and its correctness is shown. A mechanical model of the interaction between anchorage root, namely, woody plant taproot, and soil is also established. The establishment of the models provides a useful means in quantitative analysis of the interaction between plant roots and soil, and has practical values. 展开更多
关键词 slope vegetation vegetation for slope protection mechanical model frictional root anchorage root
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Emphasis on the Protecting Role of Forest Vegetation against Floods and Droughts
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《Natural Disaster Reduction in China》 1997年第4期126-131,共6页
关键词 Emphasis on the Protecting Role of Forest Vegetation against Floods and Droughts
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