摘要
以西安郊区主要周边蔬菜产区为研究地点，通过分析蔬菜鲜样、菜田土壤2m垂直分层土样、浅层地下水的水样，研究蔬菜及菜田生态系统氮肥污染现状。结果表明，按我国的地下水硝酸盐含量标准，在选点采样中1．5～3m深的地下水硝酸盐含量超标，菜田土层土质疏松与浇水次数较多的菜田硝酸盐向下淋洗现象明显，温室较露地2m深土层硝态氮与铵态氮分布浓度高，菜田2m深土层中常有硝态氮与铵态氮的聚集峰，不同深度地下水的菜田韭菜硝酸盐含量差异明显。
The objective of this research has been conducted to investigate the contamination of vegetable fields environment caused by application of chemical fertilizer, and use the methods of analyzing the content of nitrate and nitrite in vegetable, soil（〈2 m） and underground water. The results show the highest content of nitrate in underground water was detected, in depth of 1.5 to 3 m underground water from samples. The sand soil and the more times of irrigation have magnificent effects on nitrate leaching. The content of NO3^--N, NH4^＋-N in green houses soil in 2 m depth range is more rich than opening vegetable fields, and the leek of same variety in different places with different depth of under-ground water have significant different content of nitrate in samples we collected. We present some methods for controlling nitrate contamination in the environment of vegetable cultivation.
出处
《西北农业学报》
CSCD
北大核心
2008年第1期188-192,198,共6页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家“十五”科技攻关项目(2004BA516A09)
关键词
蔬菜
硝态氮
铵态氮
浅层地下水
Vegetable fields
NO3^- -N
NH4^＋ -N
Underground water
