废水资源化小球藻对拟南芥生长的肥效研究

Evaluation of Wastewater-grown Chlorella vulgaris as a Biofertilizer for Arabidopsis thaliana

[目的]探究废水资源化小球藻在植物营养方面的高值化利用潜能。[方法]研究小球藻对污水中氨氮、磷的吸收率,以及不同小球藻处理对拟南芥植株生长的生物肥效及对土壤酶活性的影响。[结果]供试水样中氨氮和正磷酸盐含量分别为100和50 mg/L时,小球藻对其的去除率分别达到80.12%和62.72%;不同处理的废水培养小球藻藻液以追肥的形式施入拟南芥盆栽植物,与CK相比,藻液肥对拟南芥株高、根长及土壤酶活性均有不同程度的促进作用。[结论]小球藻对污水中氨氮、磷酸盐具有较高的吸收效率,废水资源化小球藻对拟南芥的生长具有一定的生物肥效,该新型肥料具备高值化的开发潜力。

[Objective]To explore the high value utilization potential of Chlorella vulgaris in plant nutrition.[Method]The absorption rate of ammonia nitrogen and phosphorus in sewage by Chlorella vulgaris was studied,and the effect of Chlorella vulgaris on the growth of Arabidopsis thaliana plants and the activities of soil enzymes were also studied.[Result]When the content of ammonia and phosphate in the sample was100and50mg/L,the removal rates of Chlorella vulgaris on ammonia and phosphate were80.12%and62.72%,respectively.The cultivation of Chlorella vulgaris processing wastewater with different liquid fertilizer to form into Chlorella vulgaris plants,compared with CK,algae fertilizer on Arabidopsis plant height,root length and soil enzyme activity had different promoting effects.[Conclusion]Chlorella vulgaris has high absorption efficiency for ammonia nitrogen and phosphate in sewage.The resource utilization of Chlorella vulgaris has certain bio-fertilizer effect on the growth of Arabidopsis thaliana.The new fertilizer has high potential of development.