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| Home > Publications database > Sugarcane bagasse ash and its blends with triple-superphosphate reduce the dependency on rock phosphate |
| Home > Publications database > Sugarcane bagasse ash and its blends with triple-superphosphate reduce the dependency on rock phosphate |
| Poster (After Call) | FZJ-2022-05792 |
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2022
Abstract: Optimal crop production depends on a supply of phosphorus. Sugarcane bagasse ash (BA), a by-product of sugarcane processing, contains up to 1.6 wt% phosphorus. BA use in agriculture can reduce the dependency on rock phosphate.The potential of BA as phosphorus fertilizer was tested for soybeans on Oxisol soil under Brazilian field conditions. Fertilizing effects of 40, 80 and 160 kg/ha P2O5 from BA were compared to conventional fertilization with 40 kg P2O5 from triple-superphosphate (TSP). Additionally, BA/TSP blends consisting of 70% P2O5 from BA and 30 % from TSP (resulting in 32, 65 and 130 P2O5 kg/ha) were evaluated with respect to fertilizing efficiency. The bioavailability of P2O5 from BA to soybeans was lower than from TSP, so that doubling of P2O5 dose was necessary to compensate for the lower offtake. Grain yields following BA-based fertilizations did not statistically differ compared to TSP fertilization, albeit tended to increase by 11% when fertilized with BA/TSP blend supplied at 65 kg P2O5/ha. Thus, while 80 kg P2O5/ha in form of BA could replace 40 kg P2O5/ha in form of TSP, fertilization with 65 kg P2O5/ha in form of BA/TSP could save 50% of TSP and increase the grain yield.
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