Present Status of Low Depth Shrimp Farming System with Special Reference to Soil-water Characteristics in South-West Region of Bangladesh
Journal Title: Journal of Agriculture and Ecology Research International - Year 2017, Vol 12, Issue 1
Abstract
Management of soil and water quality parameters is important catalysts for gaining sustainable fish production in Bangladesh. In this context, a comprehensive survey was done to categories existing shrimp farms locally called ghers of Sadar Upazilla covering each union based on water depth. Among the ghers, 69% found between 1.5 < to < 3 ft depth, 17% below ≤ 1.5 ft and 14% ≥ 3 ft. and an investigation was carried out to assess soil-water quality parameters and production performance of 9 selected low depth shrimp ghers in Bemarta Union under Sadar Upazilla at Bagerhat districts of Bangladesh over a growing cycle. Physico-chemical parameters of soil-water needed to be measured and analyzed by standard methods. Total yield (3414 kg/ha/cycle in T1, 2470 kg/ha/cycle in T2, 1482 kg/ha/cycle in T3) of fishes was also calculated from the stocking and harvesting data. Most of the parameters of soil and water correlated significantly with each other suggesting a high degree of interactions between different parameters in the system. A pattern of qualitative and quantitative difference of zooplankton over phytoplankton was also recorded in these farms Therefore, a high degree of salinity fluctuation and iron deposition in waters was also documented. However, considerably lower concentrations of phosphorus in the soil indicated a net retention and trapping of phosphatic nutrients in the environment. Moreover cropping pattern was two cycles (fishes single, paddy single) per year, feeding frequencies was once in daily and shrimp suitability and production ranged from (15-27)% and 247 kg/ha/cycle to 741 kg/ha/cycle. The present findings indicate that low depth gher comparatively gives a better result in fin fishes than shrimp/prawn and creates a hazardous environment for shrimp post larvae survives, viral death, health risk and economically not viable for sustainable shrimp production in Bangladesh.
Authors and Affiliations
Md. Motiur Rahman, H. M. Rakibul Islam, Khan Kamal Uddin Ahmed
Influence of Deficit Irrigation at Silking Stage and Genotype on Maize (Zea mays L.) Agronomic and Yield Characters
Maize is considered susceptible to drought stress, when occurs at flowering stage. Thus, the development of drought tolerant maize cultivars is of important priority for plant breeders. The objectives of the present stud...
Effect of Mycorrhizal Inoculation (VAM) and Phosphorus Levels on Yield, Quality, Nutrient Uptake and Post Harvest Nutrient Status of Sunflower
The field experiment was conducted to study the effect of mycorrhizal inoculation (VAM) and different levels of phosphorus (0, 25, 50, 75 and 100 kg/ha) on yield, quality, nutrient uptake and post-harvest nutrient status...
Seed Vigour Enhancement and Protective Potential of Annona senegalensis Leaf Extracts against Fungal Pathogens of Sorghum Seeds
Medicinal plants are in nature and are cultivated worldwide and also commercially. This study was aimed at assessing the protective potential of leaf extracts of Annona senegalensis against selected fungal pathogens of s...
Food Security and Environmental Implications of Urban Wetlands Utilisation as Vegetable Gardens: The Case of Bamenda Municipality Cameroon
Wetland agriculture brings significant benefits to food security, health and income. However, ill-considered development often leads to deleterious environmental impacts and harmful consequences to people’s livelihoods....
Estimation of Optimum Rate of Sulfur for Application in Soils for Wheat Production in Ethiopia –III
Six on-farm experiments were conducted in 2013/2014 seasons, in the Central Highlands (CHLs) of Ethiopia, with the main aim of estimating optimum sulfur rate for wheat. The treatments were, 4-levels of S(S0 =0, S1 =5, S2...