摘要
为了解常见水生植物对农田退水中总氮（TN）和总磷（TP）的净化作用，通过模拟实验研究了空心菜、紫背浮萍、水芹菜、水浮莲、三叶浮萍和满江红对农田退水中TN和TP的净化能力。结果表明：在处理20d后，供试水生植物对农田退水中TN的净化率达85．8％-95．6％，净化率大小顺序为：空心菜〉水芹菜〉水浮莲-紫背浮萍〉满江红-三叶浮萍；TP的净化率达95．3％～97．2％，净化率大小顺序为：水芹菜〉空心菜〉水浮莲〉紫背浮萍=-浮萍-满江红。而对照组仅为55．6％（TN）和58．9％（TP）。这说明6种供试水生植物对农田退水中TN和rrP均有较强的净化能力。
In order to research the removal ability of common aquatic plants on TN and TP in farmland drainage, using stimulated experiment to study the removal ability of Ipomoea aquatica Forsk, Spirodela polyrrhiza, Oenanthe javanica, Eichhornia crassipes, Lemma paucicostata and Azolla imbircata on TN and TP in farmland drainage. The results showed that 20 d after treatment applied, these six aquatic plants all had great removal ability on TN and TP in farmland drainage. The removal rates of them on TN were 85.8% ~95.6% with a order of Ipomoea aquatica Forsk 〉Oenanthe javanica〉Eichhornia crassipes ~ Spirodela polyrrhiza〉Azolla imbircata Lemma paucicostata, and the removal rates of them on TP were 95.3%-97.2% with a order of Oenanthe javanica〉Ipomoea aquatica Forsk〉Eichhornia crassipes 〉 Spirodelapolyrrhiza . Lemmapaucicostata Azolla imbircata, while the removal rate of control was only 55.6% on TN and 58.9% on TP.
出处
《湖南农业科学》
2012年第2期59-61,共3页
Hunan Agricultural Sciences
基金
湖南省教育厅科学研究项目(11C0467)
关键词
总氮
总磷
水生植物
农田退水
净化率
total N
total P
aquatic plants
farmland drainage
removal rate
