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我国北方海区,当海面水温稳定下降到19～20℃时室内培育的海带夏苗便由池内移入海中。从夏苗入海到分苗为止,生产上称为夏苗暂养阶段。夏苗入海后由于环境条件,如水温从8～10℃提高到19℃左右,光强由3.000—4.000烛光增强到10.000烛光以上,营养盐及其水流等环境条件均发生了很大变化。无疑地,这些对海带幼苗生长及其形态均产生着重要影响,导致部分幼苗在形态上发生了不正常的变化,称为畸形幼苗。关于畸形幼苗的形成众说不一,目前尚未见系统报导。
In the northern part of China, when the water temperature in the sea surface drops steadily to 19-20 ℃, the kelp summer seedlings cultivated indoors will move into the sea from the pool. From the summer seedlings into the sea until the seedlings, the production known as the summer seedling holding stage. Summer seedlings into the sea due to environmental conditions, such as water temperature from 8 ~ 10 ℃ to 19 ℃, light intensity from 3.000-4.000 candlelight to 10.000 candlelight above, nutrients and water flow and other environmental conditions have undergone great changes. Undoubtedly, these kelp seedlings have an important impact on the growth and morphology, resulting in some abnormal morphological changes of seedlings, known as deformed seedlings. On the formation of deformed seedlings different, there is no systematic report.