Reúso da água da piscicultura na irrigação da bananeira Fhia 18.

Abstract

Currently, with the emergence of water scarcity and pollution related problems in big cities, started increased interest from various economic sectors on water inilization, which is also motivated by recent federal and state policies about the water management resources. In Brazil have been studying for a couple years some integration models for generation and aggregation of income. This study aimed to develop reuse strategies for using aquaculture water in fertirrgation of FHIA 18 banana crop. This research was conducted in EMBRAPA Meio Norte experimental area in Santa Rosa in the State of Piaui. The fish species was the Nile Tilapia (Oreochromis niloticus), from chitrala, and the vegetable species was the FHIA 18 banana. The storage density was 3 fishes per cubic meter water for the second cycle of banana. For the third cycle the storage density was 2 fishes per cubic meter, both during 145 days cycle. The factors studied were two. The first factor was the evapotranspiration of 6 water depths with 25, 50, 75,100,125 and 150% using the Penman Monteith method from a automatic meteorological station model Metus Compact from Metus. The second factor was the economic viability of cultivation of FHIA 18 banana and the Nile Tilapia with the same water. For the water dephts, growth rates and production components of banana estimated an ideal interval for good production. Regarding the water reuse there is no water alteration due to use of water pisciculture on banana components. The water balance of banana FHIA 18 estimated for semiarid region of Piaui Kc of 0,8 and 1,03 for banana (second cycle), for the vegetative and production phase of banana and for the third cycle received a single value of 0.92 Kc. The water requirement for this region in the 2nd and 3rd cycle was obtained with a water depth of 1,200 and 1,000 mm per cycle respectively. The efficiency of water reuse was has a inverse proportion for the irrigation depft, the treatment at 25% showed a 3,16 kg fraitm"3 of water in 2nd cycle and 4,18 kg fruit.ni3 of water in 3nd cycle. The banana and fish production consortium in both cycles, considering the highest and lowest market price, showed a profitability index that ranged from 55.7 to 31.9%