关键词: 风干污泥, 组配基质, 草坪植物, 生理生态

Abstract: Turfgrasses were planted in mixed medium with air-dried sewage sludge and soil, and the ecophysiological characteristics of two turfgrass cultivars Lolium perenne and Festuca arundinacea were investigated. The results showed that the mixed medium with different proportions of air-dried sewage sludge and soil had positive effect on the increments of dry matter yield, plant height and chlorophyll content of turfgrass. As compared with control, the dry matter yield of L.perenne and F.arundinacea increased by 148.8%-193.0% and 148.6%-159.6%, respectively. The total chlorophyll contents of two turfgrasses were 64.2%-103.0% and 44.8%-54.5% higher than that of control, respectively. Meanwhile, the addition of air-dried sewage sludge in turf medium significantly increased catalase (CAT) and peroxidase (POD) activities. The maximums of CAT and POD for L.perenne were observed in the treatment of sludge: soil (3∶13), which were 132.7% and 33.2% higher than that of control, respectively. However, there was no significant difference in CAT and POD activities among three treatments of F.arundinacea. Malonaldehyde (MDA) content of L.perenne increased in mixed medium of sewage sludge and soil as well as relative electrical conductivity. For F.arundinacea, MDA content and relative electrical conductivity had no significant difference between the treatment of S100 (700 g soil+100 g sewage sludge) and control. Based on the above analyses, mixed air-dried sewage sludge and soil as turfgrass medium can not only promote turfgrass growth, but also shorten the time of sewage sludge composting and reduce the cost of sewage sludge reutilization.

Key words: air-dried sewage sludge, mixed medium, turfgrass, ecophysiology