【摘要】 <正> 广东省的紫菜人工采苗养殖事业起始于1966年9月,当时从福建运回坛紫菜(Por-phyra haitanensis T.J.Chang et B.F.Zheng)的丝状体采苗养殖,并取得了一定的效果。为广东省开展紫菜人工养殖创造了条件。广东地处热带、亚热带地区,水温较高,坛紫菜在汕头地区的收获时间只有2个月左右,生长期短,再加上养殖技术问题尚未很好地解决,产量一直不高,远远不如福建、浙江。据汕头地区水产局的统计,全区平均产量最高亩产仅81公斤,最低只有13.5公斤(干品,下同)。这对广东沿海大力开展群众性的紫菜养殖带来很大的困难。更多还原

【Abstract】 Since 1974,we have investigated on the cultivation of local species of Porphyra, namely,P.guangdongensis Tseng et T.J.,Chang,in the Shantou District of the Guangdong province.Our studies for the last three years show that this purple laver is better adapted to higher temperature and more protected region than the other species now under cultivation in our country.Porphyra haitanensis T.J.Chang et B.F.Zheng was introduced to the Shantou District some years ago,average produc- tion per mu(667 m~2)varying from 13.5 Kg to 81 Kg(dry weight of processed laver). Our experiments on production scale show that with P.guangdongensis,the average production per mu reached 107 Kg and 144Kg in two different regions. This is due to the facts that with the Guangdong Porphyra,spore-collecting and the cultivation can be effected at water temperature as high as 28—30℃,about one month earlier than the Fujian Porphyra,thus prolonging the growth period,resulting in higher yield.The Guangdong species seems to be better adapted to growing in the inner parts of the bays,where it grows well,whereas the Fujian species requires a more agitated environment of the outer part of the bays.更多还原