污泥蚓粪对匍匐翦股颖草生长的影响

Influence of Sludge-vermicompost on Growth of Creeping Bentgrass

在塑料大棚内采用盆栽试验方法研究污泥蚓粪作为草坪坪床基质改良剂对基质理化性状和草生长的影响,并与泥炭进行了对比,以确定污泥蚓粪作为坪床基质改良剂的可行性,为开拓生活污泥资源化利用途径提供理论基础。结果表明:污泥蚓粪的加入增加了基质的养分供应,可促进草的生长,缩短草坪成坪时间。20g·kg-1和40g·kg-1蚓粪处理的草屑量分别是40g·kg-1泥炭处理的2.4倍和3.3倍。20～80g·kg-1蚓粪处理草的再生速度和叶绿素含量均大于40g·kg-1泥炭处理。但高含量的污泥蚓粪会抑制草坪草的生长,使草坪成坪时间延长,且成坪后盖度较差,质地较粗。实际建设中20～60g·kg-1的污泥蚓粪用量较为合适。污泥蚓粪具备取代泥炭成为坪床基质改良剂的潜能,可成为生活污泥农业工程利用的有效途径。

Sludge-vermicompost is the product of the process of sludge treatment by using earthworm.Influence on the properties of turf-bed and growth of creeping bentgrass based on sludge-vermicompost as the basic materials were studied to determine the feasibility and effectiveness of sludge-vermicompost as substrate modifier of the turf-bed,and to provide theoretical basis for the development of sludge resource.The results showed that the addition of sludge-vermicompost could significantly shorten the time of the formation process of the lawn,considerably increase the regeneration speed,and remarkably improve the chlorophyll content and the clipping content.The growth of grass in sludge-vermicompost treatments was better than that in peat treatment.The clipping contents in E1（20 g·kg-1 sludge-vermicompost） and E2（40 g·kg-1 sludge-vermicompost） treatments were 2.4 and 3.3 times of that in S（40 g·kg-1 peat） treatment,respectively.The regeneration speed and the chlorophyll content in all sludge-vermicompost treatments were higher than that in peat treatment.But the high dosage treatment with sludge-vermicompost inhibited the growth of the grass,thus to lengthen the time of the formation process of the lawn.During actual performance,the amount of 20~60 g·kg-1 of sludge-vermicompost was recommended actual performance.Sludge-vermicompost has potential to replace peat as substrate modifier of the turf-bed,which will be developed and utilized to be one of the effective ways of utilization of sludge.