Abstract
A greenhouse study was undertaken to determine the nitrogen and phosphorus fertilization requirements for raising mycorrhizal seedlings in soil in containers. Seedlings of Leucaena leucocephala were grown for 40 days in dibble tubes containing fumigated or nonfumigated soil uninoculated or inoculated with Glomus aggregatum. The soil was fertilized with NH4NO3 solution to obtain 25–200 mg N kg-1 soil, and with a KH2PO4 solution to establish target soil solution P concentrations of 0.015–0.08 mg P l-1. At the end of 40 days, seedlings were transplanted into pots containing 5-kg portions of fumigated soil. Posttransplant vesicular arbuscular mycorrhizal fungal (VAMF) effectiveness, measured as pinnule P content, plant height, shoot dry weight and tissue N and P concentrations, was significantly increased by pretransplant VAMF colonization in both soils. The best posttransplant mycorrhizal colonization and mycorrhizal growth responses were observed if the nonfumigated pretransplant soil was amended with 50 mg N kg-1 soil and 0.04 mg P l-1 or if the fumigated pretransplant soil was amended with 100 mg N kg-1 soil and 0.04 mg P 1-1. There was no relationship between N∶P ratios of nutrients added to the pretransplant soil medium and shoot N∶P ratios observed after transplanting. Shoot N∶P ratio was also not correlated with root colonization level.
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Contribution from the Hawaii Institute of Tropical Agriculture and Human Resources Journal Series No. 4025
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Onguene, N.A., Habte, M. Nitrogen and phosphorus requirements for raising mycorrhizal seedlings of Leucaena leucocephala in containers. Mycorrhiza 5, 347–356 (1995). https://doi.org/10.1007/BF00207407
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DOI: https://doi.org/10.1007/BF00207407