Back to Contents

FREE FULL TEXT PDF

NITROGEN LOSSES FROM TOPS OF THREE RICE VARIETIES GROWN IN NUTRIENT CULTURE SOLUTION

M. ASHRAF, S.R.A. SHAMSI¹, M.I. SAJJAD² AND F. AZAM

Abstract: During the growth of rice crop upto 7-54% of fertilizer N is generally lost from soil plant system. Using ¹⁵N labelling technique, the balance of vegetative N between anthesis and maturity in 3 rice cultivars showed a loss of 7-21 % from foliar parts. Grain yield of the plants was dependent on the efficiency of plants to utilize vegetative N assimilated before anthesis, a factor that plays a significant role in N fenilizer economy of crop plants.

Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan.

Department of Botany, University of the Punjab, Lahore, Pakistan.
Pakistan Institute of Nuclear Sciences and Technology (PINSTECH), Islamabad, Pakistan.