大米草系多年生禾本科植物,适生于泥质海岸中潮带上部至高潮带下部的海滩上,具有耐盐、耐淹、耐淤埋、耐瘠、耐风浪、生活力旺盛、无性繁殖能力强等特点。我国于1963年开始引种,用以促淤造陆,保滩护岸。目前,我省已繁殖蔓延达28.5万亩。沿海各地用作动物饲草、啤酒添加剂、增殖沙蚕(出口商品)等,进行综合利用。但大米草的减淤保港作用,当时并未被人们所认识。七十年代曾有人在启东一小闸闸下作过大米草保港尝试,因其岸段淤长不快,闸下淤积不多,草滩面积过小,效果不甚明显,因而没有作更多的探讨。近几年来,笔者调查观测了新洋港闸下南侧大米草滩对闸 Rice grasses perennial grass, suitable for living in the muddy coast tidal zone to the upper part of the climax of the beach, with salt, flooding, resistance to burial, barren, wind and waves, strong viability, asexual reproduction ability Features. China began in 1963 introduction, to promote silt making land, Paul Beach revetment. At present, our province has propagated up to 285,000 mu. Coastal areas for animal forage, beer additives, multiplication Nereis (exports), for comprehensive utilization. However, the role of silt mitigation and harbor protection was not recognized by people at that time. In the 1970s, people tried on the grass of Hong Kong under the Little Gate of Qidong. Because of the unpleasant silt on the shore and the small sedimentation under the gates, the area of ​​the beach was too small, the effect was not obvious. Therefore, no more Discussion. In recent years, the author investigated and observed the dam on the south side of the Yangtze River under the straw beach