Decreasing phosphorous sorption using fishpond sediment and goat manure in acid upland soil
2018
Hartono, A. | Anwar, S. | Putri, A.T. | Yokota, K.
Fishpond sediment and fishpond water at Petir village, Darmaga, Bogor, Indonesia have the potential as a soil ameliorant due to the nutrient content needed by crops. This present research sought to evaluate the phosphorus (P) sorption characteristics on acid soil Typic Hapludults Darmaga treated with fishpond sediment, fishpond water, goat manure and their combination, as well as conventional fertilizers. The research was conducted from March to August 2015. The treated soil samples were incubated for 1 week and 2 weeks under room temperature. The experimental design was completely randomized design with three replications. After 1 week or 2 weeks of incubation, soil samples from treatments were subjected to P sorption experiment. The data were simulated by Langmuir and Freundlich equations, wherein data was better simulated by the Freundlich equation. The Freundlich P sorption capacity (KF) value from the combined fishpond sediment and goat manure treatment was the lowest after1 week and 2 weeks of incubation. This treatment had a significantly higher n value than that of control after 1 week of incubation, however after 2 weeks incubation, the n value was not significantly different from the other treatments. From the KF and n values of Freundlich equation, it was suggested that a combination of fishpond sediment and goat manure was the best treatment needed to decrease P sorption capacity. The decrease of P sorption capacity should decrease the rate of P fertilizer applied by farmers.
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