不同用量固化剂对湖底淤泥理化性质以及草坪草生长的影响

Effect of Different Solidifying Agent Content on Physical and Chemical Properties of Lake Silt and Growth of Turfgrass

利用室内培养试验研究了固化剂不同用量对湖底淤泥理化性质的影响,结合盆栽试验分析了淤泥固化后种植植物的生长情况,以期为淤泥就地固化转化为种植土提供技术支撑。结果表明：不同用量固化剂对固化后淤泥的容重、土壤有机质含量没有明显影响,但其全盐含量和pH值随固化剂用量的增加呈升高的趋势。固化剂添加后土壤含水率明显降低,与淤泥静置10d相比,添加3%～8%固化剂后（T2～T7处理）土壤含水率分别降低了30.5%～20.2%。从高羊茅、黑麦草生长情况来看,淤泥经过固化后种植高羊茅、黑麦草的出苗率、株高和植被指数均高于未经固化淤泥处理,其中以添加4%固化剂（T3处理）的植株长势最好,其出芽率、株高和植被指数要高于其它处理。

Silt solidification as planting soil is an important way to solve dredging a large amount of silt from the lake tunnel project.In the paper,the effect of different solidifying agent content treatments on physical and chemical properties of lake silt and growth of turfgrass were analyzed.The results showed that there was no significant effect of different solidifying agent content on soil bulk density and organic matter,but the total salt content and pH value showed an increasing trend.The soil water content decreased significantly after adding solidifying agent,and compared with the silt set for 10 days,the soil water content were decreased by 30.5%-20.2%after 3%-8%solidifying agent added（T2-T7）.From the growth of Festuca elata,Lolium perenne,the emergence rates,plant height and NDVI of the trufgrass added solidifying agent were higher than those without silt solidification and 4%solidifying agent（T3）was the most significant.