Nutrient release dynamics of an accelerated compost: A case study in an Alfisol and Ultisol

Authors : Olufemi Emmanuel AyanfeOluwa, Olugbenga Oluseyi AdeOluwa, Vincent Oluwatomisin Aduramigba-Modupe

Pages : 350-356

Doi:10.18393/ejss.318795

View : 17 | Download : 6

Publication Date : 2017-10-01

Article Type : Research Paper

Abstract :Acceleration of composting process could influence fertilizer-efficiency of the accelerated composts. This study therefore evaluated the nutrient release dynamics of different rates of a commercial accelerated compost insert ignore into journalissuearticles values( OBD-plus ); in two soils described as Alfisol and Ultisol, under laboratory incubation study, in order to generate information for simulation under field conditions. Accelerated compost insert ignore into journalissuearticles values(AC); at the rates of 30, 60, 90, 120, 150 kg N ha -1 , mineral fertilizer insert ignore into journalissuearticles values(NPK 15-15-15); and conventional compost insert ignore into journalissuearticles values(CC); at 60 kg N ha -1 ,  were each mixed with  2 mm sieved soil insert ignore into journalissuearticles values(Alfisol and Ultisol); in cups, and arranged in a completely randomised design with three replications. Soils without amendment served as control. The treated soils were retrieved at 2, 4, 6, 8, 10 and 12 weeks of incubation insert ignore into journalissuearticles values(WOI);, air dried and analysed for pH, organic C, N, P and K, and data analysed using regression test. The results revealed that the 60 kg N ha -1 AC improved the pH, OC, N. P, K by -2%, 11%, 3%, 141% and 4% respectively, across the WOI, on the average of performance in the two soils, comparable with mineral fertilizer insert ignore into journalissuearticles values(-5%, 8%, -1%, 76%, 4% respectively); and CC insert ignore into journalissuearticles values(11%, 40%, 3%, 773%, 10% respectively);. The 60 kg N ha -1 AC significantly correlated insert ignore into journalissuearticles values(p<0.05); with time of incubation only with respect to P insert ignore into journalissuearticles values(0.934); and gave a similar nutrient release pattern compared with mineral fertilizer and CC, in terms of C, N, P and K in both soils. It therefore showed that the accelerated compost evaluated could mineralize in a way similar to conventional compost and mineral fertilizers, despite its shorter composting duration to maturity.
Keywords : Accelerated compost, Alfisol, incubation study, Ultisol