稻草基生态护坡板及其拦截污染物效率的实验研究

以稻草为主要原材料,采用"复合压板"工艺,研制一种可以复绿的护坡基材。经过高羊茅草种子的发芽试验表明:该基材可以作为植物生长的载体,并为植物提供营养供给。基材绿化后形成的护坡材料在径流速度为0.5L/s和坡度55o的条件下,可以有效延迟径流停留时间,对悬浮固体的平均拦截效率为85%,对水溶性磷和泥沙结合态磷的平均拦截率为93%和84%。经过生物安全性测试,表明稻草基护坡材料具有环境安全性。生态护坡材料的开发,可以有效遏制我国大量稻草资源的浪费以及缓解污染环境。

Efficiency of straw eco-slope on pollution control

Based on the "composite plate" technology, straw was used as the main raw material to produce a kind of slope support that can recover green. The seed germination experiments of Festuca elata Keng showed that the eco-slope support can be used as the substrate of plant growth and can supply nutrients for plant growth. When the rainfall rate was 0.5 L/s and the slope was 55o, the eco-slope covered with vegetation could effectively delay the runoff retention time. The average removal efficiency of the eco-slope was 85% for suspended solids. The average removal efficiencies of the eco-slope were 93% and 84% for water-soluble phosphorus and sediment combined phosphorus, respectively. The bio-safety tests showed that straw eco-slope was environment-friendly. The development of straw eco-slope could make full use of straw, thus could decrease environmental pollution from straw-burning.