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《Journal of Soil and Water Conservation》 2018-03
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Spatial and Temporal Distribution Characteristics of Nitrogen Content in Different Forms in the Surface Water of Hani Terraces

MIN Huilin;SONG Weifeng;College of Ecology and Soil & Water Conservation,Southwest Forestry University;  
To explore the unity use patterns of water and nutrients in Hani terrace,reveal the spatial and temporal variation of nitrogen,clarify the impact of land use on nitrogen concentration,and provide scientific basis for water environment protection and sustainable development,we used QuanFu zhuang watershed as the research object,analyzed the characteristics of spatial and temporal distribution of surface water nitrogen.The research showed that(1)Except for the strong variation of NO_3~--N concentration in summer and winter,the coefficients of variation of other N concentrations in different seasons were less than 100%,and showed a moderate variation.(2)The variations of the concentration of TN,NO_3~--N and NH_4~+-N concentration in the lower part of the terraced fields were(0.103~0.849,0.010~0.143,0.052~0.446 mg/L)relatively large,and the variations of the concentration of TN,NO_3~--N and NH_4~+-N concentration in forest surface water were(0.108~0.471,0.003~0.102,0.058~0.164 mg/L)relatively small.(3)The nugget coefficients of TN,NO_3~-—N,and NH_4~+-N were less than 50% in each season,and showed a strong spatial correlation in each season.The variation ranges of TN,NO_3~-—N,and NH_4~+-N were all within 1 000 min each season,indicating that the variation was distributed continuously in different scales in each season and there was spatial autocorrelation.(4)Through Kriging interpolation,the overall TN,NO_3~--N,and NH_4~+-N concentration in surface water of different seasons ranged as village woodlandterracerivers.
【Fund】: 国家自然科学基金项目“基于氢氧同位素技术的哈尼梯田水源区土壤水分运移规律研究”(41371066)
【CateGory Index】: X522
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