The utilization of brackish water-induced land through a rice-tiger shrimp coculture system

The brackish water-induced lands are abandoned by their owners because the land is unproductive. These lands are adjacent to the pond. This study aims to evaluate the brackish water-induced land through the rice-tiger shrimp coculture system. The land was reconstructed using excavators into 70 % rice fields and 30 % caren for shrimp cultivation. On this land, cultivation was carried out with Irrigated Inbred Rice (Inpari 34) and tiger shrimp (P) and Inpari 35 and tiger shrimp (T). Each treatment is two replicates. Salt-tolerant rice seeds used are varieties of Inpari 34 and Inpari 35 planted on rice fields after seedbeds for 25 days. Post larvae (PL) of tiger shrimp were adapted to a salinity of 7 ppt for 30 days, to be stocked at a density of 4 ind/m2. The growth of rice and tiger shrimp growth and water quality were monitored at a 14-day interval. Production of rice and tiger shrimp was counted at the end of the study. The results showed that salt-tolerant rice varieties Inpari 34 grew from 40 to 108 cm in height and Inpari 35 grew from 43 to 126 cm with production reach 5.060 ± 64.28 and 4.324 ± 19.09 t/ha, respectively, during 105 days of culture period. The survival rate and body weight of tiger shrimp are 20.19 ± 0.43 % and 11.56 ± 2.36 g for Inpari 34 and 20.83 ± 31.26 % and 12.40 ± 2.42 g for Inpari 35 for 65 days culture period, with production estimated 0.176 ± 0.054 (P) and 0.134 ± 0.010 t/ha (T). Inpari 34 and Inpari 35 rice varieties can be cocultured with tiger shrimp on the brackish water-induced land. Rice-tiger shrimp coculture system can be an alternative technology to restore land function that is intrusive by brackish water-induced land and support food security.