PJB-2001-2
EFFECT OF DIFFERENT RHIZOBIAL STRAINS ON THEGROWTH AND NITROGEN UPTAKE IN ACACIAS UNDER SALINE SOIL
UBAIDULLAH SHIRAZI, R. ANSARI, MUKHTIAR ALI, S.M. ALAM, BARKAT KHANZADA, AISHA SHREEN, M.A. KHAN, S.M. MUJTABA AND MUHAMMAD ALI
Abstract
A field trial was conducted at NIA experimental farm, Tandojam, Pakistan to study the effect of different Rhizobial strains on the survival and growth of two Australian Acacias viz., Acacia ampliceps and Acacia stenophylla under saline condition. Inoculation of tree seedlings improved survival and growth of both Acacia species as compared to uninoculated ones. A. stenophylla showed higher survival as compared to A. ampliceps, whereas the over all performance of A. ampliceps was much better. A. ampliceps inoculated with rhizobial strain no. 63/1 showed greater plant height, stem diameter and plant canopy followed by 403/1 and 399/1. Performance of tree seedlings with the application of 100 mg N/kg of soil alone were better as compared to two strains of Rhizobia. A. stenophylla, inoculated with strain no. 403/1 proved better for its symbiotic partner followed by 63/1. The uptake of nitrogen by plant also increased in inoculated plants but the values for N-content in seedlings without N application were higher.
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