SciELO - Scientific Electronic Library Online

vol.17 número3Contribution of mineral N to young grapevine in the presence or absence of cover cropsSoil amendment with high and low C/N residue -influence of low soil water content between first and second residue addition on soil respiration, microbial biomass and nutrient availability índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados

  • En proceso de indezaciónCitado por Google
  • No hay articulos similaresSimilares en SciELO
  • En proceso de indezaciónSimilares en Google


Journal of soil science and plant nutrition

versión On-line ISSN 0718-9516


NONGQWENGA, N et al. Possible use of struvite as an alternative phosphate fertilizer. J. Soil Sci. Plant Nutr. [online]. 2017, vol.17, n.3, pp.581-593. ISSN 0718-9516.

Struvite, from human urine, is an alternative phosphorus (P) fertilizer. This study evaluated P release from struvite and its effectiveness for maize in Inanda (Ia), Sepane (Se) and Cartref (Cf) soils. Phosphorus sorption isotherms were determined, an incubation study determined the release pattern of P from struvite, and a pot trial compared struvite with single superphosphate (SSP) on maize P uptake. The amount of P at equilibrium (where Q = 0) in the Cf was 1.39 mg L-1, followed by Ia and Se with values of 0.17 and 0.13 mg L-1, respectively. Buffer coefficients were in the order Ia > Se > Cf with values of 454, 71 and 50 mg kg-1/mg L-1, respectively. The extractable P in all three soils increased with time, with evidence of declining P release after Day 8. Struvite was most effective as a P source in the Cf followed by Se and Ia. Compared to SSP, there was significant improvement in maize grown on the Cf, while the reverse occurred in the Se. Maize grown in the Ia did not respond to either struvite or SSP. It was concluded that the phosphorus sorption was the main limiting factor that governed struvite effectiveness as a P source.

Palabras clave : Phosphorus-sorption; struvite; urine; phosphate fertilizer.

        · texto en Inglés     · Inglés ( pdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons