SciELO - Scientific Electronic Library Online

 
vol.25 número1Alta correlación entre el "pool" de carbono lábil por fumigación con cloroformo-extracción (carbono de biomasa microbiana plus) y carbono de biomasa microbiana en suelos de Argentina y BrasilDisponibilidad de cobre, hierro, manganeso, zinc en suelos del NO argentino índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

  • No hay articulos citadosCitado por SciELO

Links relacionados

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

Bookmark


Ciencia del suelo

versión On-line ISSN 1850-2067

Resumen

MIRTA, González et al. Comparison of Bray & Kurtz N°1 and Mehlich III methods in the determination of phosphorus availability in soils with continuous fertilizations. Cienc. suelo [online]. 2007, vol.25, n.1, pp. 23-29. ISSN 1850-2067.

In this work, we compared two methods of available phosphorus evaluation, Bray & Kurtz I, (the most common in the pampean zone), and Mehlich III, (commonly used in other countries in soils with contionuous P applications). The studied soils received increasing doses of phosphate fertilizer, applied to the beginning of a maize, wheat and soybean rotation. Soil samples were taken in the field, and extractable phosphorus (P) by Mehlich III and Bray & Kurtz I methods were compared. The data were adjusted with the Peto-Wilcoxon test of determination and regression analysis to evaluate the sensitivity of both methods. The results indicated that to low values, these are not different substantially, but from the 15 (mg kg-1) of P in soil, the Mehlich III method overestimates the value with respect to Bray & Kurtz I. This method was the one that showed greater variation to the added doses of P, showing greater sensitivity between treatments. It was concluded that the Bray & Kurtz I method is the one that better adapts to the practices of diagnosis and recommendations of fertilizer use.

Palabras llave : Extractable phosphorus; Bray Kurtz I; Mehlich III; Pampean Region.

        · resumen en Español     · texto en Español     · pdf en Español