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我国北部沿海,大部分海区水质贫瘠,养殖贻贝(Mytilus edulis)单产较低,这给发展贻贝养殖带来某些困难。为了探索这类海区的生产潜力,1977年7月至1978年9月,我们选择山东胶南县(氵贡)口湾泊里公社海带养殖场,作为高产试验田进行试验。多年来,群众在这一海区养殖贻贝产量都较低,亩产仅有3,000—4,000斤(4台架子为1亩,每台50米长)。在进行小面积试验(4亩)的同时,我们亦搞大面积养殖,在45亩海面上,平均亩产净贻贝9,984斤,比原来群众养殖(以4,000斤/亩为基准)增产149.6％。从1977年9月包苗到1978年3月收获,生长期为了个月。试验了不同水层、包苗日期、包苗数量、不同长度的养殖苗绳对增产的关系,对贻贝生长、性腺发育、风浪和水温对产卵的关系,也进行了定期测定和检查。
Coastal northern China, most of the sea is poor water quality, low yields of mussels (Mytilus edulis), which bring some difficulties for the development of mussel breeding. In order to explore the production potential of this type of sea area, from July 1977 to September 1978, we selected the kelp farms of Kwan-Wan-Pak commune in Jiaonan County of Shandong Province (Jigong) to carry out experiments as high-yield experimental fields. Over the years, the masses have produced relatively low yields of mussels in this sea area, yielding only 3,000-4,000 kg of mu per mu (4 shelves 1 mu, each 50 meters long). While conducting a small-area trial (4 mu), we also engaged in large-scale aquaculture. On 45 mu of sea surface, the average mussel yield per hectare is 9,984 kilos, an increase of 149.6% over the mass breeding of 4,000 jin per mu . From September 1977 package seedlings to harvest in March 1978, the growth period for a month. The relationship between the growth rate of the culture seedling rope and the yield was tested, and the relationship between the growth of mussels, the development of gonads, wind waves and water temperature on spawning was also tested regularly.