【摘要】 <正> 石花菜是一种广泛分布于我国北方沿海的经济海藻。它既生长于营养盐丰富的海区,也能呈大群落地分布于营养盐含量少的海区。因而人们认为石花菜是一种耐低氮的海藻。经过1981—1983年在黄渤海沿岸十几个点试养结果表明,秋季海洋中营养盐含量较高,石花菜生长良好,而同一海区的春季,营养盐含量较少,石花菜的颜色变淡,呈淡黄或黄绿色,藻体纤细,重量较更多还原

【Abstract】 The crop of cultivated Gelidium gathered in the natural sea of Yellow--Sea was ow. So, an experiment of cultivation by application of manure by raft method was carried out at Jiao--nan on the southern coast of Shandong and the result was as follows: 1. After being manured, the growth of Gelidium was speeded up and the crop increased. The more the quantity of （NH₄）₂SO₄ is applied, the higher the crops of Gelidium will be harvested. 2. The period of manuring is divided into 3 stages. The application of （NH₄）₂SO₄ to Gelidium tobe carried out in different stages. Throughout all stages, the fertilizer effect of （NH₄）₂SO₄ is obvious. But, the last stage is an important one in which the higher productivily is most concerned. From begining of the stage until early May, the temperature is low. During then, the plants can not grow rapidly, therefore it is unnecessary to use a large quantity of manure.更多还原