On the basis of the agricultural non-point source pollution data survey to Daye and
Yangxin, the main pollution loads and main pollution factors is calculated through the relevant
formulas. Some conclusions are drawn as follow:
The emissions of Nitrogen and phosphorus pollutants from chemical fertilizers poultry and
aquaculture are 6043.32t/a, 1044.81 t/a. The emissions in Yangxin (2511.88 t/a, 464.68 t/a) was
higher than that in Daye (3531.44 t/a, 580.13 t/a). The Pollutants emissions and pollution load are
characterized by Poultry> Chemical fertilizers > Aquaculture in Yangxin. But the features of Daye is
aquaculture > poultry> synthetic fertilizer. Thought the comparison of the equivalent load, Nitrogen
and phosphorus pollutants from aquaculture are identified as the main pollution factors. The results
show that Phosphorus is the main controlling factor from Poultry. The emissions concentration of
Nitrogen and phosphorus is above the requirements of Grade III on surface water(TN1.0mg/l, TP0.2mg/l). Appropriate control measures are put forward against main pollution sources and main
pollution factors.
Plant diversity evaluation of highway construction of nature reserve is one important
task in a construction project. I analyze and appraisal the plant diversity problems
caused by the rebuilding and extension project of No.209 national highway Duchuan
to Chunshuya section from plant species diversity, plant composition characteristics,
vegetation type's diversity and national rare and endangered plants in the construction
region. The highway reconstruction through the Savage Valley Nature Reserve
basically causes no destructive effects on plant diversity, but there are still some
negative effects. In this paper, I put forward scientific, reasonable and feasible
measures and methods to the plant diversity protection by combining with the natural
environment characteristics of the highway construction region.
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