Industrialized aquaculture was first seen in Japan in the 1980s. Most of them were artificial seedlings first, followed by seedling stocking. Specific practices were mostly carried out in man-made indoor pools (grooves). Shop about 30 cm of rough sand. Apply water daily, feed 2-3 times, and inflate. So long as the water supply is timely, the temperature is suitable, the density is reasonable, and the bait is suitable. It takes only half a year to develop the product. The output is usually 10 kilograms per square meter (about 3 kilograms per square meter). Extensive pond and marsh farming adopts artificial (or semi-manual) breeding seed stocks, and the earth ponds are stocked in large areas, and it is important to use shallow pond depressions that are not suitable for raising fish and shrimps at present. In view of the relatively large area of ​​these waters, many of which are initially developed, with poor pest removal, and the silkworm itself is a kind of food organism (including juveniles). Therefore, the water intake of Qingchi must be stricter than that of stocking. In order to prevent the invasion of many kinds of organisms, affecting survival and yield. Judging from the current performance, as long as the density is appropriate and properly managed, the per mu output can be over 50 kilograms. Proliferation tidal flats work from the perspective of multiplication resources. It is reported that Shandong and Liaoning artificially reared sand-dead larvae in a certain range of natural sea areas (intertidal zone) to reproduce silkworms, which has a gratifying effect of increasing production by 50-75 times. The method is also very simple. Social benefits And ecological benefits are very significant. China Agricultural Network Editor
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