中水灌溉对不同绿地植物叶片元素含量的影响

采用短期室内中水土柱模拟灌溉和长期中水灌溉区大田定位试验，研究中水灌溉后植物体内元素含量变化。结果表明，中水灌溉下全氮含量明显增大，全磷和全钾也有增大趋势；全钠、氯离子和硼含量因植物种类的不同而异，与对照差异显著（P<0.05）；重金属Cu、Zn、Pb、Cd含量在中水灌溉后大多数植物都有相对增加的趋势，与清水对照差异显著（P<0.05）。可见，中水灌溉引起植物体内矿质元素含量的变化。

Influence of Reclaimed Water Irrigation on Leaf Element Content of Different Greenland Plants

The indoor soil column simulation experiment irrigated by reclaimed water for short term, and the field experiment irrigated by reclaimed water for long term were used to investigated, the leaf element content changes in different plants.The results showed that total nitrogen content increased obviously, total Phosphorus and total Potassiums had a increasing trend under reclaimed water irrigation; Sodiums, Chloride ions and Boron contents were increased or decreased in different species of plants, and had significant difference with CK (P<0.05). The contents of heavy metals such as Cu, Zn, Pb, Cd had a relative increasing trend after reclaimed water irrigation, and also showed significant difference with CK (P<0.05). So,reclaimed water irrigation will change the content of mineral elements in plants.