With more than 10 years of research and application of new technologies, Mr. Long Văn Nghĩa (47 years old, Bac Lieu City) has successfully built a high-tech shrimp farming model that saves labor, protects the environment, and brings in annual profits of VND 6-7 billion.
THE JOURNEY OF INNOVATION IN SHRIMP FARMING
Coming from a farming family, in 1997 Mr. Nghĩa decided to switch from crop cultivation to semi-intensive black tiger shrimp farming. At first, the model was effective, but gradually, technical limitations caused him to suffer losses for two consecutive years.
Faced with that reality, Mr. Nghĩa determined to study Aquaculture at Can Tho University to improve his knowledge.
After graduating in 2003, Mr. Nghĩa worked at the province’s saltwater aquaculture experimental hatchery, where he tested super-intensive whiteleg shrimp farming using pond-bottom lining, paddlewheel aeration, and a stocking density of 140 shrimp/m2. However, at that time, whiteleg shrimp were difficult to sell due to the lack of export markets.
BREAKTHROUGH WITH THE FLOATING POND MODEL
In 2009, Mr. Nghĩa returned to farming on his own with 6 super-intensive whiteleg shrimp ponds, increasing the stocking density to 200 shrimp/m2, achieving a success rate of 70%.
In 2016, after many visits, he invested in 4 floating ponds (500 m2) with greenhouse structures and a Biofloc wastewater treatment system.
The round floating ponds help reduce intestinal diseases because dirt does not accumulate along the walls, lower the risk of reverse osmosis, and collect waste better thanks to the centrifugal force of the water wheels. Mr. Nghĩa spent 3 years studying pond slope, optimizing it at 45-50 cm for a 500 m2 pond, ensuring a stocking density of 200-300 shrimp/m2.
TOWARD SUSTAINABLE PRODUCTION
To achieve success, farmers must follow the water treatment process from settling ponds and treatment ponds to ready ponds before transferring water into the farming area. Disease-free seed stock must be nursery-raised to the proper size before stocking. The water treatment system separates shrimp waste, sends it through settling ponds for 3 days of purification before reuse, helping optimize efficiency and protect the environment.
With 36 farming ponds, each with an area of 800 m2, Mr. Nghĩa harvests 300-350 tons of shrimp each year, earning a profit of VND 6-7 billion after expenses. Thanks to high-tech application, he has reduced labor by one-third, increased economic efficiency, and ensured the quality of shrimp supplied to the export market.
Chúc Ly
Source: vnexpress.net
