摘要
通过水培实验,研究了弯囊苔草(Carex dispalata)不同刈割深度(C1留茬10 cm,C2留茬20 cm,C3留茬30 cm,C4留茬50 cm,C5不刈割)对生活污水净化效果及生长特征的影响。结果表明:刈割促进弯囊苔草的再生能力,C2实验组在刈割后1～7 d,植株生长速率达到3.67 cm·d-1,远远高于C5组。实验期间各实验组累积生物量变化存在差异,各组累积生物量表现为C2>C3>C1>C4>C5。刈割提高了弯囊苔草对生活污水中N、P等去除效果,C2组对TN、NH3-N、TP、COD cr的去除率均最高;弯囊苔草最佳刈割深度为留茬20～30 cm。
A hydroponics experiment was conducted to study the effects of five cutting intensities of Carex dispalata （the remained stubble height = 10 cm, Cl; 20 cm, C2; 30 cm, C3; 50 cm, C4; and no cutting, Cs ） on the growth of C. dispalata and its sewage purification efficiency. Cutting could promote the regeneration ability of C. dispalata. In C2, the plant growth rate in 1-7 days after cutting reached 3.67 cm·d-1 , far greater than that in Cs. The cumulative bio- mass varied among the treatments, showing a trend of C2〉 C3〉 C1 〉 C4〉 C5. Cutting increased the removal rates of sewage N and P by C. dispalata. Treatment C2 showed the highest removal rates of sewage TN, NH3-N, TP, and CODer. A remained stubble height of 20-30 cm was the optimal cutting intensity of C. dispalata.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第9期2418-2423,共6页
Chinese Journal of Ecology
基金
安徽省自然科学基金项目(1208085MD60)
安徽省教育厅自然科学研究项目(KJ2010A151)资助
关键词
弯囊苔草
刈割
刈割深度
净化污水
Carex dispalata
cutting
cutting intensity
sewage purification
