Green prawn and Macrobrachium praecox are the production techniques for cultivating early-to-professional shrimp seedlings in plastic greenhouses, macrobrachium rosenbergii from June to September, and raising green prawn from October to May.
Choosing a pond requires a pond area of ​​8-10 mu, with abundant water sources, good water quality, water depth of more than 2 meters, and a slope ratio of 1:2.5. The newly-opened shrimp ponds also need to be set in the middle of the pond to collect shrimp ditch which is 4 to 6 meters wide for fishing. According to the scale of farming, high drainage and low row technology is used to build the drainage system.
Doing a good seedling cultivation In the middle and late May, purchase Macrobrachium roxburgi seed stocks, cultivate green seedlings in a special pool, select a good nursery pond in early June, set up a number of water cages, and stockpile shrimp, and shrimps at the end of September. Nearly 3 cm long.
Scientific stocking Macrobrachium rosenbergii stocking 20,000 to 25,000 shrimp per acre of ponds, and fresh shrimp laying 15,000 to 20,000 shrimp per acre pond. Prior to stocking, the shrimp ponds should be disinfected, basic baits should be cultivated, and transplanted plants should be planted. Choose sunny morning stocking, pay attention to the temperature difference should not be too large.
Feed two-season shrimp feed, can be fed with Macrobrachium prawn and shrimp feed series. Macrobrachium rosenbergii is fed mainly by feeding series compound feeds, and small fish, snails, clams, and oysters are properly increased. In the larval stage, the protein content of the formulated feed is required to be above 35%, and in the adult shrimp stage it is required to be above 32%. The feed is mainly fed in the evening, which can account for about 70% of the total feeding amount. During the daytime, the feed was put in deep water areas and was put into shallow water grasses at night. The feeds were fed regularly, fixed-point, quantitatively, and qualitatively. Raising the Macrobrachium rosenbergii, the daily feeding amount is 5% to 10% of the total weight of the shrimp, and the raised shrimp is 3% to 5%.
Water Quality Management From May to June, shrimp or seedlings will be kept in stocking for the first time and keep the pool water depth 0.8 meters. In the high temperature season from July to September, the pool water will be filled up and the rainy and hot weather will be encountered. Every 7 to 10 days should be changed according to the water quality. 1 new water, change water 1/3 each time. Usually strengthen the water quality inspection and patrol ponds.
The timely harvesting of Macrobrachium rosenbergii started in mid-August to catch up and stay small, and was listed in batches in batches; the green prawn was caught on the market in May of the following year.
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