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Pesticides are widely used in China for crop protection. Econometric analysis showed the magnitude of the chronic health effects and health costs to be directly related to pesticide exposure, and accumulative pesticides has led to serious pollution to the environment. This study was conducted on a random sample of 150 rice farming households to collect information on their knowledge, attitude, and...
Given a description of city environment of Zhuzhou from the geochemical and geological environment, the author carried out further research on city ecological geochemistry and discussed the pollution of soil heavy metal through correlations analysis, R-cluster analysis and classified statistic of parent rock.
According to the actual conditions of the plain area of Jilin Province, and based on the DRASTIC index system, the Vector Drawing Function in GIS Software is applied to draw single index figures. Then different figures form the assessment cells by the Module of Special Superposition Analysis. The attributive database of GIS is applied to evaluate the antipollution capability of groundwater in the...
Contents of heavy metals in six vegetable species and the corresponding rhizospheric soils around a lead-zinc mining and smelting plant in Nanjing, China were investigated to assess the possible risks of heavy metal posed to human health through food chain and to discuss the relationships of heavy metals contents in vegetables and the corresponding rhizospheric soils. Compared to national sanitation...
A phytase-producing strain was isolated from humous soil near the root of crops in Heilongjiang province in China. According to the morphological results by microscope and transmission electron microscope, strain No. 26-13-4 was identified as Spicaria Harting. The enzyme characteristics of Spicaria Harting phytase were studied. The optimal temperature and pH for sodium-phytate hydrolysis by Spicaria...
In the Dabie Mountains of the lower Yangtze basin, China, soil loss reduction has been deemed as important as flood control after the 1998 flood, which caused great damage to the area and its residents. After 2000 year, a project of Reforestation in cultivated land at slope was started. In this study, field observations of water and sediment discharges were carried out on USLE (Universal Soil Loss...
Snowfall is a general natural phenomenon in winter-spring alternate season in northeast of China. Snow was melt with the increase of temperature, i.e. freezing-thawing alternations affects soil properties. Static chamber technique was used to monitor nitrous oxide (N2O) flux from black soils in a snowfall process. The fertilization treatments are none (CK), 150 kg N ha-1 (N1), 300 kg N ha-1 (N2) and...
The purpose of this paper is to establish an evaluation system to estimate the water ecosystem services in the Songhua River Basin. According to the MA's classification, this paper groups water ecosystem services into four categories comprised of provisioning, regulating, cultural and supporting. On the basis, the paper assesses the sixteen important significant indexes for the Songhua River Basin...
Chitin deacetylase (CDA) is an enzyme that catalyzes the hydrolysis of acetamine groups of N-acetyl-D-glucosamine in chitin. Chitin deacetylase converting chitin to chitosan in fungal cell walls. A total of 208 strains was isolated from soil samples in the riverbank of Xiangjiang River and an island of Zhanjiang. 12 CDA producing strains was founded by color reaction that including three fungus, two...
Yunfu pyrite deposit bearing thallium (Tl) with proven reserves of three million tons' Tl in Guangdong Province, China has been extensively exploited since 1970. This study investigated contamination levels of Tl and other trace metals in ecosystem such as soils, surface waters, vegetables and crops in the area near the deposit. Results show that Tl in these samples nearby has greatly enriched and...
Soil contamination with polycyclic aromatic hydro-carbons (PAHs) is an increasing problem in China. An field survey was conducted in the industrial field and adjacent soils of Benxi Iron and Steel Group Corporation of Benxi, China to investigate the contents and distribution of the PAHs of soil, and a health risk assessment was carried out with total toxicity equivalence concentration (TTEC) of 15...
A clonal herb species, Iris japonica, is used for constructing understory horticultural landscape, and it has high adaptability in understory condition. Root characteristics differences between I. japonica and other herb species in two typical natural habitats, Open area at forest edge (OAFE) and Bamboo forest (BF) were carried out on Jinyun Mountain, Chongqing, China, and a reciprocal transplant-replant...
Xinfeng, is the typical region of the vegetation restoration of serious soil and water loss zone in Jiangxi Province, in which dynamics of species diversity and achievement of 6 restoration communities were analyzed using three diversity indices, Detrended correspondence analysis (DCA) and Detrended canonical correspondence analysis (DCCA). Investigations were carried out in 2004yr and 2008yr. The...
Soil samples (0-10cm soil layer) were collected from Xuanwei and Fuyuan, which were known as high lung cancer incidence area in Yunnan province, China.The aim of the study was to investigate the trace metal pollution situation of the local village. Total 24 samples of surface soil were analyzed for 32 trace metals. The samples were digested with HNO3 and HF and H2O2 using microwave. The concentrations...
On the Loess Plateau of China, the local people have been struggling on low incomes to guarantee their food security, and contend with some of the most serious soil erosion problems in the world. This paper discusses the application, over ten years, of an ecosystem recovery plan, introduced in the Yan'gou watershed in 1998, including large scale construction and re-vegetation projects intended to...
In light of the research area current problems, SWAT model is chosen to simulate the infiltration quantity in the western of Jilin province, China. Based on data collection and field investigation, soil database has been built up in the study area. Matlab has been applied to re-calculate the diameter proportion of the soil components and SPAW used to obtain soil attributes. Result shows that in 2004a...
Xinfeng, is the typical region of the vegetation restoration of serious soil and water loss zone and a typical national demonstration zone for biological measures to control soil erosion in Jiangxi Province, SE China, in which the relationship between surface runoff and environmental factors, soil features and community features of restoration vegetation were analyzed using Detrended correspondence...
The heavy metal pollution on atmospheric dust made by fire coal of city power plant is receiving more and more attentions, but spatial and temporal effect researches on fire coal amount and heavy metal pollution of atmospheric dust after enterprise' relocation out of urban area are comparatively less. This paper studied three thermal power plants in east city and Beihu Park on the outskirts, doing...
Groundwater pollution risk assessment to delineate areas that are more susceptible to contamination from anthropogenic sources has become an important element for sensible resource management and land use planning. This contribution aims at estimating groundwater pollution risk assessment by applying the DRASTIC model as well as utilizing sensitivity analyses to evaluate the relative importance of...
Different methods were applied to recent soil survey data to estimate background concentration of zinc in paddy soils in central Anhui Province, China. Results with quite high consistency were obtained and a background concentration of 66.1 mg kg-1 was accepted and used for calculating zinc surplus in soils and thereafter for identifying areas with high anthropogenic zinc input. Spatial characteristics...
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