Nghe An: Applying Biofloc technology to stabilize algae in shrimp ponds

(Baonghean.vn) - People in shrimp farming areas in Quynh Luu district (Nghe An) are urgently treating the environment of shrimp ponds for the first crop - the main crop of the year. In particular, the area is implementing the formation of aKey VietGAP shrimp farming areawith total cost65 billion dong

Mr. Hoang Xuan Tin's family, Mai Giang 1 hamlet, Quynh Bang commune (Quynh Luu) has 12 hectares of shrimp farming, of which 5 hectares are planned for specialized shrimp farming, the remaining 7 hectares are used for ponds to store and settle water. To prepare for the new crop this year, his family has invested more than 500 million VND to renovate ponds, apply Biofloc technology in white-leg shrimp farming, to create microorganisms to kill bacteria in water and algae to stabilize the farming environment, minimize the use of antibiotics in the farming season and reduce disease outbreaks.

Water and air filtration system for shrimp farming of Mr. Hoang Xuan Tin, Mai Giang 1 hamlet, Quynh Bang commune (Quynh Luu). Up to now, his family has stocked 40% of the pond area. Photo: Hong Dien

Mr. Nguyen Dinh Tuan in hamlet 11, Quynh Thanh commune has completed releasing nearly 250,000 shrimp seeds on an area of ​​4,000 m2.². For shrimp to grow and develop quickly, he always balances the appropriate amount of food and uses anti-shock, anti-alum and heavy metal drugs in the pond, checks the water quality to have measures to adjust and balance the PH appropriately. Along with that, he adds minerals to increase the shrimp's resistance.

The first shrimp farming plan of this year in Quynh Luu district is 465 hectares in the communes of Quynh Minh, Quynh Luong, Quynh Bang, Quynh Thanh, An Hoa, Quynh Doi, Quynh Nghia, Quynh Thuan, Son Hai, etc. So far, people have planted about 90 hectares.

Some shrimp farmers in Quynh Luong commune (Quynh Luu) put up nets above to prevent birds from swooping down to catch shrimp when the season comes. Photo: Hong Dien

In order for a crop to achieve both output, quality and value, the district has instructed localities to propagate to farming households that for white-leg shrimp, the stocking density should be from 60 - 100 shrimp/m2; for brackish and saltwater tiger shrimp raised in intensive and semi-intensive farming, the stocking density should be from 15 - 20 shrimp/m2, and for improved extensive farming, the stocking density should be 6 - 8 shrimp/m2.

With the goal of minimizing disease, it is recommended that shrimp farmers only stock 2/3 of the area, leaving the remaining 1/3 as a settling pond to create a reserve and provide clean water in a timely manner for farming.

Many shrimp farmers in Quynh Luu have invested hundreds of millions of VND to replace conventional bottom liners with HDPE tarpaulins. Photo: Hong Dien

Before this year's crop, households have boldly invested in replacing conventional bottom liners with HDPE tarpaulins. This type of tarpaulin has many outstanding features such as resistance to UV rays and weather effects, chemical resistance, anti-oxidation, preventing water loss in ponds, and good disease prevention. In particular, it can be used for 8-10 years, helping farmers reduce production costs.

In order to develop the aquaculture industry sustainably, in addition to the investment of the people, Quynh Luu has a Project to upgrade and renovate the aquaculture area, including investment items: upgrading the canal system, water supply, drainage, settling tanks and traffic system on the canal, which has been implemented since September 2016, with a total investment of 65 billion VND, of which the central capital is 60 billion VND, local capital is 5 billion VND.

Good investment in farming infrastructure will create better conditions for improving the water environment for key aquaculture in Quynh Luu district. Photo: Xuan Hoang

The project to upgrade and renovate aquaculture areas, when completed, will meet infrastructure requirements and ensure stable water supply for 158 hectares of brackish and saltwater aquaculture in the communes of Quynh Thanh, Quynh Luong, and Quynh Tho of Quynh Luu district.

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