農業部-水產試驗所全球資訊網農業部-水產試驗所全球資訊網

本年度延續2020年之研究，進行0、40 %、70 %不同遮蔽率下養殖環境變化監測。經2020年5月7日放苗後開始進行試驗，至2021年6月間，持續進行水質、底泥、底棲生物、水中弧菌數及水體毒性試驗變化資料收集。水質監測結果顯示，溫度及BOD於處理組間之水質參數會隨著遮蔽度增加而遞減的趨勢；鹽度、pH及硝酸鹽(NO₃-)各處理組間之水質參數會隨著遮蔽度增加而增加的趨勢。水體毒性試驗變化中顯示不同遮蔽率下文蛤養殖池中並無明顯的毒性。經由光電養殖微生態環境監測結果顯示，文蛤養殖池的遮蔽率超過40 %後，養殖微生態環境即開始出現明顯的變化。測量池塘的初級生產力發現太陽能板遮陽的效果而降低陽光直射池水的強度，因而減少了池中的基礎生產力。以平均體重及活存率來估算池塘的產量分別為:無遮蔽組(S-0)為842.5 kg/0.1公頃池及遮蔽組(S-40)為613.3 kg/0.1公頃池。以小環藻藻泥、等鞭金藻藻泥或擬球藻藻泥進行文蛤養殖試驗，其中以投餵小環藻藻泥或擬球藻藻泥相同的活存率(92.86 %)，但投餵小環藻藻泥的文蛤有最佳的增重(10.67 %)及SGR(0.34)表現。在文蛤養殖改善試驗中添加藻水的遮蔽組產量與無遮蔽的對照組的產量沒有顯著差異(P<0.05)，未來以增加投餵次數及藻類濃度以達成改善的效果。

This year, the study in 2020 will be continued, and monitoring of changes in the breeding environment under different shade rates of 0, 40 %, and 70% will be carried out. After the seedlings are released on May 7, 2020, the test will be carried out. From June 2021, the data collection of water quality, sediment, benthic organisms, number of vibrio in water and water toxicity test changes will continue. Water quality monitoring results show that the water quality parameters of temperature and BOD between treatment groups will decrease as the degree of occlusion increases; the water quality parameters of salinity, pH and nitrate (NO₃ -) among the treatment groups will increase with the degree of occlusion And the increasing trend. The changes in the water toxicity test showed that there is no obvious toxicity in the clam breeding ponds with different coverage rates. According to the results of photoelectric aquaculture micro-ecological environment monitoring, after the sheltering rate of the clam breeding pond exceeds 40 %, the micro-ecological environment of aquaculture began to change significantly. Measure the primary productivity of the pond and found that the solar panels have the effect of shading and reduce the intensity of direct sunlight on the pool water, thus reducing the basic productivity in the pool. The average body weight and survival rate were used to estimate the yield of the pond respectively: the unshaded group (S-0) was 842.5 kg/0.1 hectare pond and the shaded group (S-40) was 613.3 kg/0.1 hectare pond. The clam culture experiment was carried out with chlorella alga mud, isochrysis alga mud or pseudochlorella algal mud, in which the same survival rate (92.86 %) of feeding chlorella alga mud or pseudochlorella alga mud was used, but feeding Clams from Cyclotella algae mud had the best weight gain (10.67 %) and SGR (0.34) performance. There was no significant difference between the yield of the shaded group with algae water and the unshielded control group in the improvement test of clam aquaculture (P<0.05). In the future, the number of feedings and the concentration of algae will be increased to achieve the improvement effect.