TY - JOUR AU - Quoc Dao AU - Trang Le AU - Anh Tran AU - Anh Dinh AU - Cuong Le AU - Khanh Pham AU - Minh Hau Dong AU - Trung Nguyen PY - 2022/06/30 Y2 - 2024/03/29 TI - Study current state of environment of small intensive shrimp farming in Ho Chi Minh City area and proposed solutions for improvement JF - Science & Technology Development Journal: Science of the Earth & Environment JA - STDJSEE VL - 5 IS - SI1 SE - Original Research DO - https://doi.org/10.32508/stdjsee.v5iSI1.570 UR - http://stdjsee.scienceandtechnology.com.vn/index.php/stdjsee/article/view/570 AB - The objective of the study is to survey the current state of the environment, the technical factors of intensive farming of white leg shrimp at household scale, and evaluate and analyze related problems, thereby proposing solutions, improve farming technology to improve productivity. The study conducted a general survey of shrimp farming techniques in different farming areas in Ho Chi Minh City; survey, measure water quality indicators of 6 typical ponds in Nha Be and Can Gio areas and apply the resting floor model for one pond. Research results show that the current small-scale intensive farming of vannamei shrimp in Ho Chi Minh City and surrounding areas has some technical problems in management and treatment of water environment ponds as well as management and treatment of waste generated during the farming process. The water supply for shrimp farming, especially the ammonium parameter, has been and is exceeding the standard, becoming popular in all brackish water shrimp farming areas; concentration of pollutants accumulated in the pond gradually increased over time; The concentration of ammonium and toxic substances for shrimp mostly exceeded the standard during the farming period, increased rapidly in the middle of the crop and slowly increased at the end of the crop. The design of the treatment ponds and farming ponds has not kept up with the fluctuations in input water quality and has not created an optimal environment for high-density shrimp farming. Shrimp ponds have not been optimally designed, shrimp lack of accommodation or have no place to rest, affecting harvest productivity. The study tested the model of resting floor on the pond to improve the condition of the pond, and the initial results showed that the shrimp yield efficiency increased by 12,5% per unit of culture time and the feed consumption decreased about 10%. Thereby, the model of the resting floor needs to be expanded experimentally, combined with improvements to increase reliability, and gradually applied in practice to increase economic efficiency and improve the quality of shrimp farming environment. ER -