Võ Thị Gương, Đỗ Thị Xuân (trang 86-92)
Từ khoá: khoáng hoá, đạm, đất, ao, nuôi artemia, artemia, Vĩnh Châu, Sóc Trăng
Nitrogen mineralization in Artemia ponds
Big constraint of reducing cyst yield of artemia cultivation on saline soil areas. Hypotheses of this problem is N mineralization of soil ponds, releasing N available to the water column. Top soil samples (0-5cm) of 14 artemia pond were collected to study the relation between soil chemical properties and soil N mineralization. The pond where algae bloom has always occurred contains high organic matter and high soil N released. There is no correlation between total N, soil pH, C/N, organic matter and soil N mineralization in aerobic laboratory incubation. Strong correlation was found between labile organic N and N mineralization at 7 days incubation. These results suggest that labile organic N could be used to estimate soil mineralization in artemia ponds, which relate to algae bloom. If combine the soil N released with the management of inorganic and organic fertilizer, the problem of algae bloom can be controlled.