【作者】 于波； 陈建军； 祖艳群； 李元；

【Author】 YU Bo,CHEN Jian-jun,ZU Yan-qun,LI Yuan *(College of Environment and Resources,Yunnan Agriculture University,Kunming 650201,China)

【机构】 云南农业大学资源与环境学院；

【摘要】 选择杞麓湖北岸的六街村平地、坡地、林地采用径流小区法进行观测,通过对2010年5—10月l4场降雨的径流量和泥沙产生量中的氮磷流失监测,结果表明:(1)平地、坡地、林地径流输出量平均值分别为224 m3.hm-2、280 m3.hm-2、86 m3.hm-2,最大值是坡地烤烟为288 m3.hm-2,最小值是林地2号为50 m3.hm-2。泥沙输出量平均值分别为403 kg.hm-2、618 kg.hm-2、61 kg.hm-2。最大值是坡地辣椒为1 333.97 kg.hm-2,最小值是林地2号为97.18kg.hm-2。径流量和泥沙量大小的关系是坡地>平地>林地。径流量与降雨量显著相关;(2)径流中TN输出量最大值是平地烤烟为4.76 kg.hm-2,最小值是林地2号0.62 kg.hm-2;TP的输出量最大值是平地大蒜为1.44 kg.hm-2,最小值是林地2号0.05 kg.hm-2。TN和TP输出量平地>坡地>林地;(3)径流中COD输出量中最大值是坡地烤烟为23.08 kg.hm-2,最小值为林地2号4.24 kg.hm-2;COD输出量坡地>平地>林地;(4)泥沙中TN输出量最大值坡地辣椒5.05 kg.hm-2,最小值山地2号0.25 kg.hm-2,TP输出量最大值坡地辣椒3.32 kg.hm-2,最小值山地2号0.14kg.hm-2;泥沙流失中TN和TP输出量为坡地>平地>林地。杞麓湖流域中坡地是径流量、泥沙量和农业面源污染负荷产生的区域。更多还原

【Abstract】 Based on the observation of the nitrogen and phosphorus loss in surface runoff in under rainfall events from May to October in 2010,plots experiments on cultivated lands were conducted in Liujiecun village beside northern Qiluhu Lake watershed.The results showed that:(1) For sloped farmland,lacustrine cultivated land and forest land,the average amount of the runoff were 224 m3.hm-2,280 m3.hm-2and 86 m3.hm-2.the highest was 288 m3.hm-2in sloped farmland planting tobaco,the lowest 50 m3.hm-2in forest land No.2.The average amount of sedimentation were 403 kg.hm-2,618 kg.hm-2and 61 kg.hm-2.The highest was 1 333.97 kg.hm-2 in sloped farmland of Chili,the lowest 97.18 kg.hm-2 in forest land No.2.A positive significant relationship between runoff and sedimentation was observed.The sequence order was sloped farmland> lacustrine cultivated land> forest land.(2) The highest total nitrogen output at the runoff in different regions was 4.76 kg.hm-2in lacustine cultivated land planting tobaco,the lowest 0.62 kg.hm-2in forest land No.2.the highest total phosphorus output was 1.44 kg.hm-2 in lacustrine cultivated land planting garlic,the lowest export 0.05 kg.hm-2 in forest land No.2.The total nitrogen and phosphorous outputs at the runoff in different regions were orderly followed as lacustrine cultivated land>sloped farmland>forest land.(3) The highest COD output was 23.08 kg.hm-2 in lacustrine cultivated land planting tobaco,the lowest export 4.24 kg.hm-2 in forest land No.2.(4) The highest total nitrogen outputs at the eroded sedimentation in different regions was 5.05 kg.hm-2 in lacustrine cultivated land planting chilie,the lowest 0.25 kg.hm-2 in forest land No.2.the highest total phosphorus output was 3.32 kg.hm-2 in lacustrine cultivated land planting chili,the lowest 0.14 kg.hm-2 in forest land No.2.The total nitrogen and phosphorous outputs at the eroded sedimentation in different regions were orderly followed as sloped farmland> lacustrine cultivated land> forest land.The sloped farmland was the main area of agricultural non-point source pollution.更多还原