Effects of Rhizobium inoculation on growth and nodulation ofAlbizia falcataria (L.) Fosh. andAcacia mangium Willd. in the nursery |
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Authors: | Umali-Garcia Mercedes Libuit Juliana S Baggayan Rogelio L |
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Institution: | 1.Forest Biological Sciences, College of Forestry, University of the Philippines at Los Baños, College, 3720, Laguna, Philippines ; |
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Abstract: | Three separate experiments were conducted in the nursery using grassland soil as a growing medium. The first experiment was
conducted to assess the nodulation of the two legume trees grown in unamended soil, the second was done to determine the effects
of N-fertilizer application on the interaction of the five Rhizobium isolates withA. falcataria and the third experiment was conducted to determine the effects of liming on theRhizobium × A. mangium interaction.
Three local Rhizobium isolates, A16, A18, and A14 were effective forA. falcataria with A16 as the most promising strain under the conditions described. In general, application of combined nitrogen suppressed nodulation
ofA. falcataria. Nodulation in the absence of combined N exceeded those fertilized with 30 kg N ha−1 by 114.0%, 60 kg N ha−1 by 209.6% and 100 kg N ha−1 by 237.1%.
Two local isolates, Am10 and Am2, and an introduced strain, NA 1533 from Australia were promising forA. mangium. Unlike inA. falcataria, the application of combined nitrogen at the rate of 100 kg N ha−1 did not suppress nodulation inA. mangium. Liming the soil to pH 6.5 regardless of nitrogen fertilizer application improved the performance of the Rhizobium—A. mangium symbiosis. |
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Keywords: | Acacia mangium Albizia falcataria inoculation nursery Rhizobium |
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