Boxworm (Nemesis) pond culture

Fang Xingxing (commonly known as sandworm) is an annelid, polychaete, also known as Nereis, sea worms, jellyfish. Checkerworm is crispy in flesh, rich in protein, fat, calcium, phosphorus, iron and many other nutrients. Its taste is better than that of sea cucumber and shark's fin. It is a seafood product that is popular among consumers. China's Shandong Province, Fujian Province, Guangdong Province, Guangxi Province, and Taiwan's coastal areas are all distributed. The Guangxi Sea Area has the most abundant resources. However, due to the long-term predatory exploitation of P. elegans, the resources have dropped rapidly and the supply of products has fallen short of demand. In recent years, some farmers in Beihai City, Guangxi Province have conducted experiments on artificial pond culture of P. elegans and achieved success. According to statistics, 50 kg per mu of seedlings are planted, and the average yield per mu is 205 kg. The output value per mu is 8,600 yuan, and the benefits are significant. The breeding situation of P. elegans is now described as follows for reference by farmers:

I. Pond conditions

The aquaculture pond area is generally suitable for 3 mu to 5 mu. It is rectangular or square and has a water depth of 80 cm to 120 cm. The sediment quality is good for sandy soil, and the sediment content is more than 70%. It requires looseness and thickness. Tangtang is sturdy and durable, with good water retention in ponds, which naturally drains pool water. Adequate water sources, good water quality, no industrial and domestic sewage inflows nearby.

II. Preparations before Breeding

1. Clean up and disinfect the pond. After closing the insects, seal the dam dry pond, repair the pond embankment, clear the bottom of the pond, and dig trenches around the pond. The ditch is 50 cm wide and the pond is divided into blocks of 200 cm to 250 cm in width. The width between the block and the block is 50 cm wide. The ditch, water supply and drainage and operation. The aquaculture blocks were divided into sections of soil and rammed soil, and then the blocks were flattened and wiped with wooden planks. The blocks were pressed to form a “road shape” on both sides of the block face, so that the block area was not water. For flattened ponds, 10 days before stocking, drugs should be applied. The bleaching powder can be used to make the whole pool splash. The dosage per acre is from 8 kg to 10 kg.

2. After the fertilizer and water treatment period expires, water is stored to cultivate the basic food. The water inlet is filtered through a mesh bag with an aperture of 80 mesh, and the inlet water is 40 cm to 50 cm. Fertilizer can be used for fermentation of farmyard fertilizers, with an amount of 200 kg per mu, spread on the surface of the culture block, or 3 kg of nitrogen fertilizer and 1 kg of phosphate fertilizer per mu. Conditional farmers use organic fertilizers mixed with microbial preparations for better results.

Third, seed stocking and cultivation management

The larvae of the larvae are mainly before and after Qingming Festival every year. Each mus of 50 kilos of seedlings has a specification of more than 400 pieces per kilogram. The larvae that are stocked require individuals to be intact without injury. The color is dark brown. Stocking should be chosen to be sunny. The pond's seawater salinity is about 25‰, and the difference between the breeding water body and the seedling salinity should not exceed 5‰.

Seed stocking density of 30 per square meter is appropriate, calculate the number of seedlings required before stocking, and then spread the seed evenly on the surface of the culture block, let it naturally into the sand.

The larvae of the larvae will enter breeding management after stocking. Frequently inspect the surface of the culture and regularly clear the ditch. After stocking for 2 days to 3 days, the survival rate of the stockings was checked in the lower pond and the survival rate was found to be low, and the seedlings should be immediately filled. Every week after the next pond inspection, gutters and dams should always care. Into the summer, timely clear the channel, the block surface into a "road-shaped", do not make the block area of ​​water, so that the block surface is solid up, form a stable living environment, easy to grow square beetles. When typhoons and heavy rainstorms occur, the proportion of seawater in the culture ponds often drops abruptly. After the rain, the pond water should be drained in time, and fresh seawater should be included in the high tide to prevent the death of the star beetle by excessively low proportion of seawater.

During the growing season, according to the climate change situation, pay attention to regulate the water level. The weather in spring and autumn is warm and shallow, and it is hot in summer and cold in winter. Change the water once a week, dry ponds 2 days to 3 days a month, the use of dry pond machine, the lower pond to clear the fish, shrimp, crabs and canola and other predators.

The star caterpillars feed on benthic diatoms and organic debris. According to the conditions of ponds during farming, they can fertilize algae or feed some artificial baits as supplements.

Fourth, listing insects

The individuals in the North Sea are approximately 10 cm long. After 6 to 8 months of artificial breeding, the product specifications can be as long as 80 to 100 pieces per kilogram. After the dry ponds, excavation methods were used to arrest them. The larvae in the sediment have a depth of about 25 cm to 40 cm. When they are in dry ponds, they carry maggots or cockroaches. They find burrows and quickly excavate. Be careful not to dig the worm body, and it is not easy for the stump to be stocked. The collected larvae must prevent the sun and rain, so as not to affect the survival rate. After harvesting, they are basketed for sale.

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