Low-density non-pollution large-scale cultured shrimp
Disposable Cosmetic Towel(face Towel) Face towels that are safe to use,Disposable Cosmetic towel,Large size face towel JIANGYIN MASK PURIFICATION SUPPLIES NON-WOVEN CO.,LTD. , https://www.jynonwovenmask.com
In recent years, due to the fact that the low level pool cannot completely drain water in the intertidal zone, serious long-term contamination of the sediment, direct water-contained cross-infection, difficult area management, poor equipment, and other factors have plagued the operators for a long time. Less is a common phenomenon, but the vast number of technical personnel and the people's constant exploration has finally found a new way of low-density pollution-free large-scale shrimp farming, low-level pool gradually out of the woods, the benefits are also significant. Its technical operation is described as follows:
First creation: Normally, the seedlings will be marked in March and April. When the crude body is 3-4 cm in length, they will be placed in Yangtse-type Datang. The density of seedlings in Datang will be regulated by thick-spotted larvae of 4000 shrimp/shrimp. Mu, and then raised for 10-20 days until its body up to 6-7 cm began to be fed animal-based live bait based on small shellfish, 50-60 days after specification up to 15 / kg. The survival rate is about 70%, the output is 100-200 kg/mu, the cost is 6-7 yuan per catty, the selling price is 40 yuan, and the profit is 4000-6000 yuan.
No.2 production: In general, in June and July, stocks of shrimp, prawns, larvae, shrimp, shrimp, shrimp, shrimp, shrimp, etc., with a high quality of 30-40 tails/kg were carefully selected and stocked at a density of 3000 fish per mu. Fresh live bait, after 40-50 days of breeding specifications up to 13 / catty, the survival rate of about 80%, yield 100-200 kg / acre, cost 8-9 yuan per catty, priced at 40 yuan, 4000-6000 yuan profit.