ABSTRACT
EVALUATION OF THE NITRATE-REDUCTASE ACTIVITY AS A DIAGNOSTIC TOOL OF ORANGE NITROGEN NUTRITION

Rafael Ruiz S.1 y Aldo Norero Sch.2
 

Nitrate-reductase activity and total N was mesured in orange leaves in order to evaluate the nitrogen status of the tree. This work was done in the citrus growing area of Venezuela. Enzyme activity showed a close correlation with fertilization practices as well as yield. Total N was found to be less satisfactory.

Keywords:
1Ing. Agr., M. S., Programa Fertilidad de Suelos, Estación Experimental La Platina, Instituto de Investigaciones Agropecuarias (INIA), Casilla 5427, Santiago, Chile.
2Ing. Agr., Ph. D. CIDIAT. Apartado 219, Mérida, Venezuela