PJB-1996-11
GROWTH AND NITROGEN NUTRITION OF RICE (ORYZA SATIVA L.) IN SOIL TREATED WITH N-SERVE AND A NITRIFICATION INHIBITING INSECTICIDE
ASMA LODHI, N.N. MALIK* AND F. AZAM
Abstract
A pot experiment was conducted to study the effect of N-Serve (nitrification inhibitor) and Baythroid (an insecticide with strong inhibitory effect on nitrification in soil) on dry matter yield and N uptake of rice (Oryza sativa L). N-Serve was applied @ 1.1, 4.4 mg kg-1 soil and Baythroid @ 1.6 and 6.4 mg kg-1 soil, either alone or together with 15 N-labelled (NH4 )2 SO4 @ 200 mg kg-1 soil. Both N-Serve and Baythroid caused an increase in the dry matter yield of root and shoot portions, with significant decrease in the grain weight. There was no significant effect of either inhibitor on total dry matter yield and N uptake. Nitrogen yield and dry matter yield were significantly correlated in different treatments.
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