期刊文献+

西安市绿地化肥面源污染状况研究

Study on Non-Point Pollution from Urban Green Land of Xi'an
下载PDF
导出
摘要 通过对2000-2014年西安市绿地面积、化肥施用量、比例结构、施用强度和氮、磷肥流失量的分析计算,得出:1随着西安市绿地面积的逐年递增,化肥施用总量也逐年增加,年均递增率达18.60%。且化肥品种单一,氮、磷、钾的结构比例不合理,存在着严重的偏施氮肥,而轻施磷肥和钾肥现象。2西安市绿地化肥年均施用强度达662.73kg/hm2,是发达国家污染控制上限的2.95倍和世界平均水平的6.32倍,已成为西安市又一重要的面源污染源。3西安市氮、磷肥年均流失总量达564.06t/a,其中氮、磷肥流失量分别为483.85t/a和80.22t/a;地面径流和地下淋溶流失量分别为528.37,35.69t/a,表明氮肥对面源污染的贡献远大于磷肥;化肥流失对地表水体的污染远大于对地下水的污染。 The non-point pollution situation caused by urban greenland was analysed by investigating the area ot greenland, and me consumption, proportion, amount in unit area of fertilizers, and the loss load of nitrogen and phosphorus fertilizer in Xi'an urban greenland from 2000 to 2014. The results showed that: ① As the increase of the urban green areas, fertilizer amount was also in- creasing with annual increasing rate of 18.60%. And fertilization proportion was unreasonable, which was in the condition of heav- ying nitrogen fertilizer application and lighting phosphate and potash fertilizer. ②The average annual amount in unit area of fertilizer of 15 years (2000--2014) was 662.73 kg/hm^2, which is 2.95 times higher than the international safety limit of 225 kg/hm^2 and 6.32 times higher than the world's average level, which meant it had become another important non-point pollution source in Xi'an. ③The total loss amount of nitrogen and phosphorus fertilizer was 564.06 t/a, in which the loss amounts of nitrogen and phosphate fertiliz- ers were 483.85 t/a and 80.22 t/a respectively, and the loss amounts in surface runoff and groundwater were 528. 37 t/a and 35.69 t/a, respectively. It showed that the nitrogen fertilizer was greater than phosphate on the contribution of non-point source pollution, and the pollution of fertilizers to the surface water was greater than to the groundwater.
作者 姜凌 易秀
出处 《中国农村水利水电》 北大核心 2016年第8期186-189,195,共5页 China Rural Water and Hydropower
基金 陕西省矿产资源勘查与综合利用重点实验室开放课题基金资助(2014HB004) 教育部 国家外国专家局"111"项目"干旱半干旱地区水文生态及水安全学科创新引智基地"(B08039)
关键词 城市绿地 面源污染 化肥流失 Urban green space non-point source pollution fertilizer losses
  • 相关文献

参考文献20

二级参考文献124

共引文献615

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部