施用污泥堆肥对木槿生长的影响研究

以城市污水处理厂堆肥污泥为研究对象,采用田间小区实验方法开展了污泥土地利用对土壤环境和植物影响的研究。结果表明,污泥土地利用可显著提高土壤中氮、磷及有机质的含量,污泥用量为10%、30%和50%时均不同程度地促进了木槿的生长发育,地上生物量比对照分别提高12.8%～200.8%、23.9%～134.1%和16.4%～112.3%,地下生物量分别提高13.7%～253.9%、16.4%～132.2%和9.3%～123.5%。污泥施用量只要控制在10%以内,污泥中重金属不会对土壤环境产生不良的影响。

Effects of Application of Sewage Sludge Compost on Hibiscus Syriacus

There is a great deal of municipal sewage sludge annually, how to stabilize and dispose it harmlessly is becoming more important. Effects of application of sewage sludge compost on soil and plant were studied. The results of one year field experiment showed that compost could improve the soil chemical and biological properties, such as, the contents of nitrogen, phosphorus and organic matter in the soil increased significantly, thus being advantageous to the growth and development of Hibiscus Syriacus L. When the sludge application was 10%, 30% and 50%, the aboveground biomass of Hibiscus Syriacus increased 12.8%-200.8%, 23.9%-134.1% and 16.4%-112.3% respectively, compared with that of the control, while, the underground biomass increased 13.7%-253.9%, 16.4%-132.2% and 9.3%-123.5%, respectively. There was no harmful effect of heavy metals on the quality of soil environment when the application rate of sewage sludge compost was controlled within 10%.