The Influence Of The Number Of Pond Bottom Aeration Points On White Shrimp Farming, Litopenaeus Vannamei

One effort to increase dissolved oxygen concentration in pond waters is by applying bottom aeration system. The number of aeration point in the pond bottom allegedly affects oxygen solubility and shrimp farming performance. This study utilized two concreted ponds of 1000 m(2) each equipped with two bottom aeration systems built by 100 cm long of rubber diffuser, totaling 140 pieces (Treatment A) and 70 pieces (Treatment B). The PL-9 of L. vannamei were stocked with density of 600 ind/m(2) and reared for 70 days. Treatment A resulted dissolved oxygen of 3.04-10.36 (6.60 +/- 1.07) mg/L which were higher than Treatment B where the range of dissolved oxygen were 2.77-7.92 (6.08 +/- 0.95) mg/L. In contrast, nitrite, total nitrogen, phosphate and dissolved organic matter were lower within treatment A. Shrimp production, survival rate and feed conversion ratio in Treatment A were5, 620 kg, 93.6% and 1.12, respectively; whereas in treatment B were 4,000 kg, 80.7% and 1.51. Treatment A resulted in a better the L. vannamei farming compared to treatment B. To increase the supply of dissolved oxygen in the pond, a rubber diffuser can be used which is connected to a blower.