Nitrogen and phosphorus loss in different land use types and its response to environmental factors in the Three Gorges Reservoir area

The control of agricultural non-point source pollution (AGNPS) is an urgent problem to be solved for the ecological environment construction in the Three Gorges Reservoir Area. We analyzed the nitrogen (N) and phosphorus (P) loss and its response to environmental factors through monitoring the nutri...

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Bibliographic Details
Published inHuanjing kexue Vol. 33; no. 10; p. 3390
Main Authors Zeng, Li-Xiong, Huang, Zhi-Lin, Xiao, Wen-Fa, Tian, Yao-Wu
Format Journal Article
LanguageChinese
Published China 01.10.2012
Subjects
China
Crops, Agricultural - growth & development
Ecosystem
Environmental Monitoring
Fertilizers
Nitrogen - analysis
Phosphorus - analysis
Rain
Rivers
Soil - chemistry
Water Movements
Water Pollutants, Chemical - analysis
Water Supply - analysis
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Summary:The control of agricultural non-point source pollution (AGNPS) is an urgent problem to be solved for the ecological environment construction in the Three Gorges Reservoir Area. We analyzed the nitrogen (N) and phosphorus (P) loss and its response to environmental factors through monitoring the nutrient loss in different land use types after returning farmland to forest. The results showed that: 1) The variability of nutrient concentration loss was strong in different land use types under different rainfall conditions, and the variability in the concentration of available nutrient was much higher than that of total nutrient; 2) Compared to farmland, the annual phosphorus loss of different land use types was reduced by 84.53% - 91.61% after returning farmland to forest; the reduction of annual nitrogen loss was not significant except Chinese chestnut forest (Castanea mollissima) and arbor forest, and the nitrogen loss was much higher than the phosphorus loss in all land use types; 3) The particle phosphorus and
ISSN:0250-3301