Apparent recovery of surface applied nitrogen fertilizer by a coastcross pasture.

PRIMAVESI, A. C. P. de A.; PRIMAVESI, O. M. A. S. P. R.; CORREA, L. de A.; CANTARELLA, H.; SILVA, A. G.

Apparent recovery of surface applied nitrogen fertilizer by a coastcross pasture.

Autores

PRIMAVESI, A. C. P. de A.

PRIMAVESI, O. M. A. S. P. R.

CORREA, L. de A.

CANTARELLA, H.

SILVA, A. G.

Descripción

Nitrogen recoveries from fivel levels of urea and ammonium nitrate surface-applied on coastcross pasture, grown on a dark red lotosol (Hapludox), in Sao Carlos, SP, Brazil under tropical altitude climate, were estimated. Significant differences occurred within periods (P<0.05), depending on climatic conditions. Under adequate plant growth conditions, mean N recovery from urea was about 67%, sometimes reaching 80% of that from ammonium nitrate. Recovery of ammonium nitrate varied from 45 to 68% of applied N.