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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (18): 378-383.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

宁夏地下水中硝态氮含量状况及其影响因素研究

贾小妨1,李玉中1,周 涛2,王世荣2,宋吉青1   

  • 收稿日期:2009-04-13 修回日期:2009-04-27 出版日期:2009-09-20 发布日期:2009-09-20
  • 基金资助:

    华北村镇地下饮用水安全保障技术研究与示范;北方农业干旱调控技术研究

Study on the Nitrate Content and the Influence Factors of Groundwater in Ningxia

JIA Xiao-Fang   

  • Received:2009-04-13 Revised:2009-04-27 Online:2009-09-20 Published:2009-09-20

PDF (PC)

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摘要：

本文研究了宁夏地区不同作物种植体系下地下水中的硝态氮含量状况及其影响因素，同时对宁夏地区的地下水水质进行评价。结果表明，不同作物种植体系下地下水中硝态氮含量具有明显差异，其中果园＞温室菜＞葡萄地＞林地＞小麦玉米＞水稻＞盐碱地，地下水中硝态氮的总体平均含量都低于20mg?L-1，均达到Ⅲ类水质标准。果园所对应地下水的硝态氮含量最大，平均为7.94mg?L-1，盐碱地所对应地下水的硝态氮含量最小，平均为0.74mg?L-1。综上，宁夏地区地下水情况比较乐观，但个别地区已接近污染警戒，如果不采取合理的预防措施，情形将趋向恶化。地下水中硝态氮含量随埋深的变化，有可能受土壤地质层或地下水补给途径的影响，没有呈现明显的规律性，这也可能与样点的选取和样点多少有关。

关键词: 土壤酶活性, 土壤酶活性, 土壤肥力, 相关分析, 典型相关分析

Abstract:

The groundwater nitrate concentration and their influence factors under different cropping systems are studied in this paper, the quality of groundwater in Ningxia is evaluated. The result indicates that there are obvious differences in the content of nitrate in the groundwater under different cropping systems. Among them, Orchard>Greenhouse Vegetable>Grape>Forest land>Wheat-corn>Paddy rice>Saline and alkali land. The average content of nitrate in the groundwater is all lower than 20mg?L-1, which all meet the groundwater quality standard Ⅲ. The content of nitrate corresponding orchard in the groundwater is the highest, the average is 7.94mg?L-1, the lowest of the content of nitrate in the groundwater corresponds saline and alkali land, the average is 0.74 mg?L-1. As we've seen, the quality situation of groundwater in Ningxia is optimistic, but individual areas approach to pollution level. If not take the measures to prevent and control, the situation will deteriorate. The nitrate contents of the groundwater have no obvious regularity along with the burying depth, which may be affected by textures of local soil or recharge ways of groundwater. It also may be associated with places and numbers of sampling points.