Pak. J. Bot., 27(2): 275-281, 1995.

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			Updated: 27-12-10
	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. National Institutefor Biotechnology & Genetic Engineering, Jhang Road, P.O.Box 577, Faisalabad, Pakistan.

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