The Research Of Soil Character Change And The Situation About Vegetation Restoration From Ecological Bags Of Xibaipo Highway In Hebei Province

Eco bag planting technology due to its ease of use, corrosion resistant, UV-resistant, resistant to microbes, good stability characteristics, widely used for slope afforestation and barren hills afforestation projects and so on. Currently, the research of ecological bags concentrated on city vertical greening, and lake shores restoration, river governance and slope complex green, of application aspects. The general of method is used dedicated mechanical equipment, according to specific of production process, put the grass species, and fertilizer, and insurance agent, by must of density colonization into can natural degradation of no spinning cloth or other material, and after machine of rolling and acupuncture of composite positioning processes, formed must scale of ecological bags, and ecological bags stacked up. But the demonstration area in xibaipo highway in Hebei province practical application, the plant is torn bags of seed planting, which can improve seed germination, reduce planting costs. This is different from conventional methods. Scientific guidance and proper measures for ecological restoration technology landscape plays a very important role. Currently Green eco-bags lack of technology management research, scant guidance from the scientific and reasonable measures. This research for ecological restoration technologies soil and plants about slope vegetation, and identify ecological technology of slope soil moisture and nutrient variation on influencing factors of vegetation recovery. The main results are as follows:(1) The change of soil moisture and nutrientsOn each height in 2013 and 2014, soil moisture, October 2014, content was significantly higher in 2013. Eco-bags of soil moisture in the facade works change was caused mainly by the gravitational influence of the law, secondly there is the influence of environmental factors. Variation of soil moisture of different height in different years was caused by natural conditions. Ecological band belongs to the physical grit, fractions of coarse silt, soil texture to light loam. The soil is alkaline, and variation is small, evenly distributed.Due to the return of vegetation, vegetation to return nutrients to the soil, the whole, soil nutrients(nitrogen, potassium, phosphorus and organic matter) content increased, but remains in a nutrient-poor state. Eco-bags of soil nutrient variation: slope beneath the soil available nitrogen, potassium and phosphorus content, and in the Middle slope, soil available nitrogen, potassium, phosphorus and organic matter content are minimum.(2) Species diversity in vegetation changesSpecies composition and structure of the genus: eco-bag of vegetation types in 2013 and 2014 more than one or two-years herbs, and has since broadcast less able, dominant families are the same, 2014 vegetation increases at the same time, reduction in number of species. Need manual spreading and replanting of vegetation each year, but Amorpha fruticosa, semen ziziphi spinosae has been adapted to the environment of the shrub, gradually grew, and the large coverage, of which the dominant status. In the choice of plant species should be chosen perennial, growing strong, resilient native plants.From eco-bag of slope vegetation height and coverage: in 2013 and 2014, as the vertical height increased, the average vegetation height and coverage showed a decreasing trend. At the same height, the 2014 from 2013 a increase in average height plants, marked increase in number and coverage of amorpha fruticosa, and vegetation cover decreases.From eco-bag of slope vegetation diversity: ecological vegetation species composition simple vegetation types more single, in vegetation species composition types of individuals in communities more unevenly distributed, advantage individual types of obvious, advantage standing out. Vertical distance from the 6m, 4m, Shannon diversity index and Pielou evenness index and Simpson diversity indices showed a decrease, indicating vegetation diversity decreased in 2013, compared to the 2014. Vertical distance from 2m, and Shannon diversity indices lower, Simpson diversity index and Pielou evenness index increased species reduce the number of instructions in 2013, compared to the vegetation in 2014, uneven distribution of individual types of dominant species obvious advantage standing out.(3) Soil moisture, nutrients and plant height, coverage, the relevance of diversityAll in all, overall poverty levels in soils, when soil water of ecological bags in xibaipo in Hebei Province Highway at a lower level, available potassium in soil and height of plant and α-diversity was a significant positive correlation. It is said that vegetation growth has some influence on soil moisture on slope restoration. While manual maintenance should be increased at a later stage, should also pay attention to soil water and nutrients nitrogen, phosphorus, potassium, and organic matter addition.(4) Ecological bags later management of the Expressway and recommendationXibaipo in Hebei province still need manual sowing of vegetation restoration of Highway slope and labor management, research results show that current slope plant communities after 1 year later, vegetation communities are shifting to more advanced development stage, is a positive development, despite the dominant species become increasingly evident, but also did not regress. The current status development trends from view, while the coverage of species has declined but increased proportion of vegetation in bush plants.Eco-bag in the process of vegetation restoration in slope to improve species diversity, increased coverage of slope greening and improve slope landscaping, you should choose suitable plant species and reasonable labor management. Has higher nutrient content, but still in a State of lack, so later when management, should pay attention to the ecological slope soil nutrient supplement.