摘要
2007年5月初至12月底对沪郊旱地地下水进行了定时观测,并测定了地下水的营养成分。结果表明:降水后潜水位迅速上升,然后缓慢下降直到平衡;地下水位日变化呈波动性,每天极差在3～6cm,每天水位在12:00时最低,20:00～22:00时最高;降雨后潜水中的硝酸盐浓度明显升高,当水位降低后硝酸盐浓度又明显回落,水位不同其浓度也不同;潜水中硝酸盐浓度的变化和土层中硝酸盐含量均自上向下逐渐减小。
The groundwater levels of dryland in Shanghai suburbs were observed at regular intervals between May and December of 2007,and the groundwater nutrients were also determined.The results showed that just after rain the groundwater level rose rapidly and then fell slowly until the equilibrium;The groundwater level fluctuated daily with a range of 3～6 cm,and was the lowest at 12：00 and the highest between 20：00 and 22：00） The nitrate concentration of groundwater increased obviously after rain but decreased obviously when the groundwater level fell,being different at various groundwater levels;Both the nitrate concentration of groundwater and the nitrate content of soil layer gradually decreased from top to bottom.
出处
《上海农业学报》
CSCD
北大核心
2011年第1期88-90,共3页
Acta Agriculturae Shanghai
基金
国际植物营养研究所(中国项目部)(Shanghai-09)资助
关键词
旱地
地下水位
硝酸盐
降雨
上海郊区
Dryland
Groundwater level
Nitrate
Rainfall
Shanghai suburbs
