PJB-1995-40
USE OF BIOFERTILIZERS TO ENHANCE RICE YIELD, NITROGEN UPTAKE AND FERTILIZER-N USE EFFICIENCY IN SALINE SOILS
SIKANDER ALl, NAIMA HAMID, GHULAM RASUL AND KAUSER A. MALIK
Abstract
Azolla, plant growth promoting rhizobacteria (PGPR) and chemical fertilizer alone and in different combinations were used to study the effect of nitrogen biofertilizers on rice biomass, nitrogen uptake and fertilizer-N use efficiency. 15N labelled ammonium sulphate was used to trace its uptake into rice plant and compute fertilizer-N recovery. Maximum rice biomass (straw+grain), its N yield and fertilizer-N recovery were obtained in the treatment where PGPR inoculum with 30 KgN/ha was used followed by treatment where in addition to PGPR and fertilizer-N, Azolla cover was also present. Use of biofertilizers alongwith a low input of chemical fertilizer-N soils was useful for increasing rice biomass, N uptake and fertilizer-N recovery in rice grown in saline soils.
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