Applied Mechanics and Materials Vols. 641-642

Abstract: Biogenic volatile organic compounds are a class of small molecule compounds produced by the plant secondary metabolites. Although the contents are relatively low, but have strong ecological effects. In plant communities, the plant can hinder the growth of competing plants around by releasing BVOCs, and it could also enhance the ability to resist predators. At the same time, it can inhibit the pathogenic microorganisms and enhance the disease resistance. In addition, BVOCs can regulate the body's mental and physical state to exert the health effects. Therefore, the study of the BVOCs’ ecological functions is of great significance.

Abstract: In order to accurately obtain the real-time environment information, this paper introduces a solar energy environmental monitoring intelligent system, and gives the corresponding design of hardware and software flow. The system adopts solar energy to supply power, uses ARM as the core microprocessor, and acquires environment information by multiple sensors, so that system terminal displays the real-time monitoring information. This design not only enhances Security for people's work, life and travel, but also makes full use of solar energy to achieve a modern green life.

Abstract: Specific electric conductivity of water samples in a polluted urban stream was compared with other water quality parameters such as concentration of inorganic carbon, total organic carbon, and total nitrogen. Increasing of water conductivity 1.3...10 times was observed downstream canalization outlets discharging drainage waters together with residential waste waters from inhabited district of city. In some periods water conductivity showed good correlation with pollutants concentration such as TN and IC (with correlation coefficients 0.54...0.96). The received data show that electric conductivity can be used for revealing waste waters pollution in fresh surface waters.

Abstract: Based on determination of heavy metal contents in soils and plants, understanding pollution of heavy metal in soils and plants, as well as the heavy metal accumulation in plants, in order to provide scientific basis for phytoremediation of heavy metals in mining areas. The determination and analysis on the concent of Zn, Cu, Pb, Cd, Mn was made in Niuba and southern mining area in Gejiu City. The result showed that the soil pollution from Cd is the most serious while the pollution from Zn was relative to minimum in Niuba abandoned mining area. In southern mining area, Pb in soil pollution was the most serious while Cu was relative to minimum Analysis on correlation between the heavy metal content in plants and soils was made based on the 5 plant samples (Pyracantha fortuneana, Zea mays, Acroptilon repens, Equisetum ramosissimum and Cucurbita moschata) collected from Niuba reclamation area and 5 plant samples (Corylus yunnanensis, Alnus nepalensis, Pyracantha fortuneana,Cupressus torulosa,Acacia dealbata) from recovery area of southern mining area. The results show that Pyracantha fortuneana has a better correlation with soil than other plants, Cucurbita moschata and soil have poor correlation, Corylus yunnanensis has better correlation with soil compared to other plants, Acacia dealbata has poor correlation with soil.

Abstract: In this paper, the Chlorella vulgaris in Yellow River Diversion reservoir was selected as experimental subjects to cultivate in laboratory. The the relationship between algae biomass and N,P was studied from the following aspects：the type of nitrogen source, the concentration of N and P，and the ratio of N and P. It was found that KNO₃ was one of the best nitrogen source for growth of Chlorella vulgaris. Chlorella vulgaris can live at the lower N concentration, while it was very difficult to survive in the absence of P. So P is the limiting factor for its growth. In addition, the optimum ratio of nitrogen to phosphorus was 16:1, for Chlorella vulgaris’s growth. It was similar to the algae outbreak in the water eutrophication, glycine as the Chlorella nutrition, the algae grew slow at early and later rapid.

Abstract: With the China's rural social and economic development, great changes in the aspect of living level have taken place. But meanwhile, in the course of economic development, a great number of environmental costs have been invested in the vast rural areas, which have restricted the development of agricultural economy. We systematically study the existing major environmental problem of rural environmental protection in the process of new socialist countryside construction. Then policy and suggestions was proposed so as to materialize the sustainable development of rural regional economy and society. It is urgent to strengthen the propaganda and education of rural environmental protection, so as to solve the problem of environmental pollution and establish a harmonious relationship between new socialist countryside construction and environmental Protection.

Abstract: Taking Daliuta mine as research object, use its 2002, 2011 two same period Landsat TM/ ETM and remote sensing image as the data source, use pixel dichotomy to get its vegetation coverage evolution trend data; Use DEM digital elevation model data in the region to generate digital terrain model based on ArcGIS, and make overlay analysis with the vegetation coverage evolution trend data to study the relationship between the vegetation coverage and terrain factor of the mine area. The results showed that: From 2002 to 2011, the vegetation coverage evolution trend of Daliuta mining mainly moderate improvement and significantly improvement, and concentrated in middle altitude, low slope, sunny area.

Abstract: Toxaphene is an organochlorine insecticide, widely used in cereals, vegetables, fruits, tea and other pests. However, in killing pests, increasing agricultural production, while toxaphene aquatic creatures threat. In order to enrich aquatic organisms toxicological data, evaluate the risk to aquatic organisms toxaphene healthy growth, we use the traditional toxicological approach to study the toxic effects of toxaphene goldfish (Carassius auratus)'s. Study 5 toxaphene concentration 7d goldfish exposed catalase (CAT), superoxide dismutase (SOD), acetylcholinesterase (TChE), glutathione peroxidase (GSH-PX), malondialdehyde (MDA) effects, the results showed that: toxaphene in 0.1,0.2,0.3,0.4, 0.5 μg / L in five concentrations, these five enzymes promoting effect, with more toxaphene concentration high, goldfish liver CAT activity is stronger, the stronger the brain and liver SOD activity, the activity of the brain TChE weaker, the stronger the brain activity of GSH-PX, and the contrast with the blank, P <0.01, illustrate the five enzymes do toxaphene toxicity testing of biomarkers.

Abstract: Digestion samples, graphite atomized method and flame atomization method, determinated Cd, Zn, Ni, Cu, Pb, Cr heavy metals in fruits, soil and water of 6 different vineyards of Xinjiang. Analysis and comparison of measurement results with national standards, results showed that: Zn in the fruits of TR2 and Ni in the fruits of TR3 were close to the standard limit value. Zn in the soil of TR2 was close to the standard limit value. Cr in the soil of TR1 was 196.5835 mg/kg, which is greater than 150 mg/kg of II security level standard, so the soil was belong to III security level. Ni in water of TR3 was close to the standard limit value. They should be taken into account.

Abstract: With the characteristics of great ornamental value and strong adaptability, Abelia grandiflora 'Francis Mason' is widely used in the garden. For the shortage of water in some garden and landscape spaces, the effect of water stress on the physiology of Abelia grandiflora 'Francis Mason' was tested to ascertain the optimum irrigation of it. The results showed that water flood suppressed the growth of the plants seriously after treated for 58 days, which embodied in the dramatic decline of Fv /Fm, Fv'/Fm', ETR, qP, chlorophyll and net photosynthetic rate. Treating with drought for 50 days was proved to be beneficial for the growth of the plants, for the Fv /Fm, Fv'/Fm', ETR, qP, chlorophyll were increased. But these fluorescence parameters were decreased 60 days later and the plants were dead in 90-days drought stress. Water treatment had the most significant impact on the plants whlie mild drought stress a little.