Metabolism and efficiency in nitrogen utilization during senescence in pepper plants: Response to nitrogenous fertilization

Abstract

The effect that application of nitrogen (N) rates exerts on some parameters of N metabolism in pepper plants (Capsicum annuum L. cv. Lamuyo) during senescence was studied. All plants were grown under controlled conditions in an experimental greenhouse. The treatments consisted of the application of 4 rates of N at the onset of flowering in the form of KNO₃ (N1: 6 g m^‐2, N2:12 g m^‐2, N3:18 g m^‐2, N4:24 g m^‐2). The results obtained show a optimal effect ofN2 fertilization on uptake, translocation, and assimilation of NO₃ ^‐ in the leaves. The N2 treatment registered maximums in the concentration of chlorophyll a and b, and in commercial yield. In conclusion, for improved pepper cultivation during senescence, treatment N2 gave the maximum yield, and increased metabolism and efficient utilization of N.