Đánh giá hiệu quả nuôi tôm chân trắng sử dụng hệ thống nuôi tuần hoàn kết hợp lọc sinh học

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Văn Hùng Hoàng, Duy Khương Lê, Công Tâm Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Đại học Hạ Long, 2022

Mô tả vật lý: tr.101

Bộ sưu tập: Metadata

ID: 337254

Thêm vào giỏ Liên kết toàn văn

In this study, a commercial shrimp (Litopenaeus vannamei Boone, 1931) culturing was designed and evaluated based on the efficiency of biological and mechanical filtration in a recirculation aquaculture system (RAS). Changes in water quality parameters and the growth rates of commercial shrimp production were used to assess the efficiency of RAS. The results showed that the water quality parameters: TAN, NO2-, NO3- were always below the allowable standards in the biological filtration system without affecting shrimp growth. The biological filtration system has controlled environmental parameters to help shrimp grow well at high stocking density with the growth rate of shrimp in RAS equivalent to that of external pond systems. The study found that the optimal stocking density for the system was 1600 fish/tank (800 fish/m3), which gave a survival rate of 54.2%, a yield of 18.5 kg/tank, an average shrimp size of 46.9 shrimp/kg, and an average shrimp weight of 21.3 g/head. The results of this study open up a direction for more sustainable shrimp farming by saving water resources and limiting disease outbreaks during farming shrimp.Nghiên cứu này đã thiết kế và đánh giá hệ thống nuôi tôm chân trắng (Litopenaeus vannamei Boone, 1931) không thay nước, dựa vào hiệu quả của hệ thống lọc sinh học và cơ học trong hệ thống tuần hoàn khép kín. Biến động chỉ số môi trường và các thông số trong quá trình nuôi tôm thương phẩm được sử dụng để đánh giá hiệu quả làm việc của hệ thống. Kết quả cho thấy, các thông số chất lượng nước: TAN, NO2-, NO3- luôn ở dưới giới hạn cho phép trong hệ thống lọc sinh học, không làm tác động đến sức khoẻ tôm. Hệ thống lọc sinh học đã kiểm soát được các thông số môi trường, giúp tôm phát triển tốt ở mật độ nuôi cao với tốc độ sinh trưởng và phát triển tương đương với các hệ thống ao nuôi ngoài trời. Kết quả nghiên cứu đã lựa chọn mật độ nuôi phù hợp cho hệ thống là 1600 con/bể (800 con/m3), cho tỷ lệ sống 54,2%, sản lượng 18,5 kg/bể, cỡ tôm trung bình 46,9 con/kg và khối lượng tôm trung bình 21,3 g/con. Kết quả nghiên cứu này mở ra hướng nuôi tôm bền vững hơn nhờ tiết kiệm nước và hạn chế phát sinh dịch bệnh trong quá trình nuôi tôm.

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