苦草 ,俗名扁担草 ,系沉水植物。它的根系发达 ,生长快 ,具有净化水质的作用。蟹池内栽种苦草 ,可为河蟹提供良好的生态环境 ,使河蟹生长迅速、体质强壮、疾病少、规格大、产量高。又可作为河蟹活动的攀附物和蟹的植物性饵料 ,有利用河蟹的蜕壳和躲避。夏季池水过浅时 ,苦草还 Bitter grass, commonly known as the pen, grass, Department of submerged plants. Its well-developed root system, rapid growth, with the role of water purification. Crab pond planted with bitter grass, crabs can provide a good ecological environment, so that crabs grow rapidly, strong constitution, disease less, large size, high yield. But also as crab activities attached to the crab and plant phytoplankton, the use of crabs molt and avoid. Summer water too shallow, bitter grass also