海带是著名的藻类植物,属褐藻门海带科,其种类繁多,目前世界上已发现的就有四十多种,大多分布于我国北部沿海,以及朝鲜、日本、苏联太平洋沿岸等地区,植株一般长2～4米,大的可达7米以上,密布于海水中,故素有“海上森林”、“海上庄稼”之称。我国史籍上很早就有关于海带的记述,宋代《嘉祐本草》:“海带,催生,治妇人及疗风,亦 Kelp is a famous algae, is a genus of brown algae kelp, its wide range, there are more than 40 species found in the world, most of them distributed in the northern coast of China, as well as North Korea, Japan, the Soviet Union Pacific coast and other areas, plants generally Length 2 to 4 meters, the largest up to 7 meters above sea level, densely covered in seawater, so called “sea forest”, “sea crops”. Chinese history books have long been described on the kelp, the Song Dynasty, “Jia You Materia Medica”: "kelp, birth, treatment of women and the treatment of wind, also