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Surveys has been developed for the quality of the soil environment in the vegetable plot, choosing some vegetable bases in Chengdu's suburb- Pengzhou as the study area. In order to analyze the changing trend of soil environmental quality in the suburban vegetable base, comparisons from the soil pH, soil nutrient composition, soil heavy metals to pesticide residues have been made with the previous...
Geographic informational system (GIS) and the Soil and Water Assessment Tool (SWAT) was used to simulate the transport of runoff, sediment, total nitrogen and total phosphorus into the Zhangjiafen stations. The main objective was to discuss climate change affecting on sediment and water quality. The results showed: The SWAT generally performs well and could accurately simulate monthly runoff, sediment,...
This paper uses statistic and nonlinear regression approaches to describe and evaluate the changes of the cyanobacteria growth in the Guishui lake in Beijing remote suburb. The results show that high ratios of TN/TP (>20), and low concentrations of TP (<;0.3 mg/L), and COD (<;30 mg/L) may constrain the growths of the cyanobacteria in the lake. The cyanobacteria growths are positively related...
Contents of soil organic matter (SOM) and total nitrogen (TN) were measured in Nanjishan wetland of Poyang Lake, China, in 2009. Three types of soil from Ass. Triarrhera lutarioriparia , Ass. Carex cinerascens and Ass. Eleocharis valleculosa were analyzed along water gradients. Results showed that spatial distributions of both SOM and TN were very similar in soil profiles (0-100 cm) of the three areas...
A study was initiated in a small semi-arid catchment with reforestation history to elucidate the soil change. Results showed that land use pattern was closely related with terrain conditions and human disturbance levels. Soil properties under four typical human-disturbed land use types (orchard, shrub, cropland and reforested land) were compared. Significant differences were found for total nitrogen...
Concentration and distribution of particulate organic carbon (POC) and mineral organic carbon (MOC) in soils of different ecological zones of Yancheng coastal wetland were investigated, and the effects of vegetation on soils environment, such as the accumulations and characteristics of soil organic carbon, were also discussed. Results indicated that total organic carbon (TOC) and total nitrogen (TN)...
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