Macrobrachium rosenbergii and Polygonum multiflorum

It is feasible to use Macrobrachium rosenbergii and Polygonum multiflorum polyculture or polyculture with Takizawa oysters. The following are the main technical measures for the introduction of one production example.
In Zhangzhou Aquatic Station in Fujian Province, the experiment of 180 mu mixed Fish breeding of Macrobrachium praecox and C. edodenatus was carried out in 1996. The breeding period was 180 days, and 225.5 kg of Macrobrachium rosenbergii was produced, with a size of 40-50 tails per kilogram per mu; Kilograms, average weight 0.4 kg, maximum weight 0.6 kg; total output value of 2.37 million yuan, profit of 729,000 yuan, average profit of 4050 yuan per mu, economic benefits are very significant, and its technical points are:
I. Selection of ponds Macrobrachium rosenbergii requires high dissolved oxygen. Therefore, ponds with adequate water sources, fresh water, convenient drainage and irrigation, no pollution, mud bottom or sand bottom are selected as the polytrophic pool. The pool is provided with an intake and a drainage gate, with a pool size of 5-10 acres and a mixed water depth of 1.3-1.5 meters.
Second, the stocking mode and stocking capacity are mainly shrimp-based, mixed-breeding, farming, and breeding mode. Each turtle grows body length 0.8 centimeters of Roche shrimp wan desalination 20,000, mixed-breeding body length of 5-7 centimeters puffer fish 400 species.
3. Before the stocking, prepare to drain the pool water 50 days before the seedlings are set aside to remove excessive silt, level the bottom of the pool, and expose to the sun for 20-30 days to plug the leak. 10-15 days before planting, disinfection and disinfection. Water depth 1 meter, splash lime 125-250 kg per acre or bleach 15-20 kg, kill wild fish, bacteria and parasites. In addition, 0.8 grams of trichlorfon was used per acre to kill mixed shrimp and aquatic insects. Check the pool water before releasing the seedlings, confirm that the toxicity has passed before releasing the seedlings, and fertilize the natural basic bait (plankton) for 7-10 days before transplanting, so as to increase the survival rate of the stocking.
Fourth, seedlings Macrobrachium Roche macrostocking in May-June, the shrimp seedlings have been completely diluted and raised for 2-3 days before entering the pond. One month after the shrimps were released, they were stocked with fishes.
V. Feeding and management First, the water quality control, the previous period (15 days after planting) to Tim water, a small amount of water change; in the middle and late according to the water quality often change the water, generally every 2-3 days for water 1 times, change the amount of water 20- 40%; the transparency is maintained at 20-30 centimeters in the early stage and 30-50 centimeters in the middle stage. Each pool is equipped with 1-2 aerators, and the second is bait. Macrobrachium rosenbergii (15 days after laying) is mainly fed with zooplankton, with a small amount of egg tarts and tofu. In the middle period, fresh live bait (such as small fish, shellfish, etc.) is used together with bait. Feed 3 times a day, feed each time in the morning, evening and midnight, and set up 1-2 bait stations per tank to observe their feeding conditions. The amount of feed depends on the quality of water, weather, and food intake. Pteromasaurus mainly feed on zooplankton and organic debris, so it is not necessary to feed the feed.
Sixth, disease prevention and control 澎 Ze 鲫 strong life, generally no obvious disease. Macrobrachium rosenbergii experienced bacterial black spot, fungal black shank, and filamentous algae during the trial period. Meteorism uses improved water quality and uses 0.5-0.7 grams of potassium permanganate per cubic meter of water in Quanchiposa, and 50% in 24 hours. Black leeks are splashed with 10-15 grams of lime per cubic meter, and the amount of water is increased. For the growth of filamentous algae, fertilization is used to reduce the transparency of pool water. In combination with copper sulfate, 0.5-0.7 grams per cubic meter of water is used to kill and kill filamentous algae.
VII. Harvesting of razor clams. Feeding until the end of December, Macrobrachium rosenbergii will be harvested and marketed in October. The specifications will be around 50 pieces per kilogram. When the water temperature is below 16°C, all will be caught. In the Macrobrachium rosenbergii pool, the adult fishes were bred and mixed. In the condition of no increase in feeding, the average yield per mu was 126 kg, and the income per mu increased by 1890 yuan. The economic benefits were obvious.

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