Agronomic effectiveness of a granular poultry litter-derived organomineral phosphate fertilizer in tropical soils: Soil phosphorus fractionation and plant responses
Production of organomineral phosphate fertilizers (OMF) from poultry litter (PL) has been suggested to reduce the dependence on phosphorus (P) reserves. Here, we compared a granular PL-derived OMF to triple superphosphate (TSP) in two contrasting tropical soils (Oxisol and Entisol) by using isotope...
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| Published in: | Geoderma Vol. 337; pp. 582 - 593 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-03-2019
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Production of organomineral phosphate fertilizers (OMF) from poultry litter (PL) has been suggested to reduce the dependence on phosphorus (P) reserves. Here, we compared a granular PL-derived OMF to triple superphosphate (TSP) in two contrasting tropical soils (Oxisol and Entisol) by using isotope dilution with 32P. Our study aimed to gain insight into soil P fractionation, and P availability to maize plants achieved by P fertilization (0, 25, 50, 75 and 100 mg kg−1 of soil), in order to investigate the agronomic effectiveness of OMF. Despite μ-XRF maps revealing that the mixture of PL and TSP as OMF resulted in P hot spots disseminated in a low-concentration background, whereas for the TSP treatment higher P concentration was uniformly distributed in the granules, there was no difference in maize yield and fertilizer P recovery (%R) between P sources in both soils. In the Oxisol, there was no difference between fertilizers in any of the soil P pools, but larger readily phytoavailable P and smaller moderately labile P fractions were obtained with OMF. In the Entisol, the labile P pool was larger with TSP. Nevertheless, acid and alkaline phosphatase activity and microbial biomass were affected by P rate and P source. The results show that OMF is an effective substitute for conventional phosphate fertilizers, since OMF promotes P recovery, plant P uptake and biomass yields compared to those obtained with TSP.
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•OMF was compared to TSP in two contrasting soils by isotope dilution assay (32P).•Sequential P fractionation allows assessing the behaviour of P fertilizers in soil.•Phosphatase activity was associated with a depletion of labile P fractions.•OMF promoted biomass yields and P uptake comparable to those obtained with TSP.•OMF is an effective substitute to conventional phosphate fertilizers. |
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| ISSN: | 0016-7061 |
| DOI: | 10.1016/j.geoderma.2018.10.003 |