Use of fishpond sediment for sustainable aquaculture—agriculture farming

An experiment was carried out in triplicate, in 1 1 m 2 plots using six treatments, viz. zero input control (S 0 N 0 P 0 K 0 ), fertilizer control (S 0 NPK), sediment 60 kg without fertilizer (S 60 N 0 P 0 K 0 ), sediment 60 kg with N and K (S 60 NP 0 K), sediment 120 kg without fertilizer (S 120 N 0 P 0 K 0 ) and sediment 120 kg with N and K (S 120 NP 0 K) to determine the potential of tilapia pond sediment to supply P to morning glory, and the effects on the soil aggregate stability and the bulk density. The application of 60 and 120 kg sediment plot -1 corresponds to 30% and 60% of the plot soil by weight, respectively. The study confirmed that the application of tilapia pond sediment at 30% to farm soils with supplementation of N and K, i.e. the treatment S 60 NP 0 K, provided the required amount of P to morning glory and gave fresh and dry matter yields of morning glory equal to the fertilizer control plot. Furthermore, the application of 30% sediment significantly improved the soil aggregate stability and decreased the bulk density of farm soils to favorable levels. This kind of integration would ensure long-term sustainability of both aquaculture and agriculture farming.