Chất lượng nước khu vực nuôi tôm-lúa luân canh tại huyện Thới Bình, tỉnh Cà Mau=Assessment of water sources in the rice-shrimp farming area of Thoi Binh district, Ca Mau province

0 Người đánh giá. Xếp hạng trung bình 0

Tác giả: Văn Hóa Âu, Trường Giang Huỳnh, Tiến Chương Ngô, Ngọc Hải Trần, Trung Giang Trần, Văn An Trần, Hùng Hải Vũ, Minh Nhí Vưu

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học (Đại học Cần Thơ), 2024

Mô tả vật lý: tr.150-160

Bộ sưu tập: Metadata

ID: 244394

Thêm vào giỏ

Mục tiêu của nghiên cứu là đánh giá chất lượng nước tại một số tuyến kênh trong khu vực tôm-lúa luân canh tại huyện Thới Bình, tỉnh Cà Mau nhằm cung cấp thông tin cơ bản cho việc quản lý chất lượng nước của mô hình. Mẫu nước tầng mặt được thu tại 6 điểm qua 4 đợt thu mẫu gồm: đầu vụ tôm (tháng 02), cuối vụ tôm (tháng 7), đầu vụ lúa (tháng 10) và cuối vụ lúa (tháng 12) tại xã Biển Bạch Đông. Kết quả cho thấy hầu hết các yếu tố môi trường phù hợp với tiêu chuẩn chất lượng nước mặt và thích hợp cho nuôi trồng thủy sản. Tuy nhiên, một số chỉ tiêu như tổng chất rắn lơ lửng (TSS), nhu cầu oxy sinh học (BOD), tổng đạm (TN) và tổng lân (TP) ở một số điểm tương đối cao so với quy chuẩn về quản lý chất lượng nước. Độ mặn biến động lớn giữa đầu vụ và cuối vụ tôm, đặc biệt trong các tuyến kênh nội đồng. Các muối dinh dưỡng có khuynh hướng tăng vào cuối vụ lúa (tháng 12). Do đó, để sử dụng nguồn nước hiệu quả, người nuôi cần theo dõi, đo đạt các thông số môi trường trước khi cấp vào các vuông tôm-lúa trong khu vực nghiên cứu.This study aimed to assess the quality of water supply resources for rice-shrimp farming in Thoi Binh district, Ca Mau province to provide fundamental information for water quality management. Surface water was collected at 6 sites with 4 sampling periods including the beginning and end of the shrimp crop (February/July), the beginning and end of rice crop (October/December) in Bien Bach Dong commune. Results showed that most of the water quality parameters still met the national regulations and are suitable as water supply for aquaculture. However, several parameters such as total suspended solids (TSS), biological oxygen demand (BOD), total nitrogen (TN), and total phosphate (TP) were relatively high as compared to the national technical regulation on surface water quality. High variations of water salinity, especially in inland canals, were observed during the shrimp crop. Nutrients showed an upward trend over the sampling period. It is therefore suggested that r egularly monitoring water quality should be done while using water supply resources for the rice-shrimp farms in the survey area.

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1. Đọc trực tuyến

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