白烂,是海带因细胞藻褐素和叶绿素被分解而呈现白色以致死亡的一种病害,其发病的主要原因是光照过强和营养条件不良。一方面,从历年的发病情况来看,白烂多是当海带长到一定大小、水温达到一定高度而海水透明度突然增大时发生的。另一方面,在营养条件不良的海区,尤其是缺氮的贫区,白烂也会经常发生。由于该病发病面广,扩散速度快,因而对海带养殖生产的危害极大,必须采取有效 White rotten, kelp is a disease caused by white alginate and chlorophyll being decomposed and causing the death of white kelp, its incidence is mainly due to excessive light and poor nutritional conditions. On the one hand, from the incidence of the calendar year, white rotten and more is when the kelp grow to a certain size, the water temperature reaches a certain height while the sea water transparency suddenly increased. On the other hand, white rotten areas often occur in areas with poor nutrition, especially in poor areas where nitrogen is scarce. Due to the wide range of disease incidence, the proliferation of fast, which is harmful to the production of kelp breeding great, we must take effective