title: Nutritional characteristics of the leaves of native plants growing in adverse soils of humid tropical lowlands.
abstract: Acid sulfate, peat, sandy podzolic, and saline soils are widely distributed in the lowlands of Thailand and Malaysia. The nutrient concentrations in the leaves of plants grown in these type of soils were studied with the aim of developing a nutritional strategy for adapting to such problem soils. In sago and oil palms that were well-adapted to peat soil, the N, P, and K concentrations were the same in the mature leaves, while the Ca, Mg, Na, and Fe concentrations were higher in the mature leaves of the oil palm than of the sago palm. Melastoma malabathricum and Melaleuca cajuputi plants that were well-adapted to low pH soils, peat. and acid sulfate soils were also studied. It was observed that a high amount of Al accumulated in the M. marabathricum leaves, while Al did not accumulate in M. cajuputi leaves. M. cajuputi plants accumulated large amounts of Na in their leaves or stems regardless of the exchangeable Na concentration in the soil, while M. malabathricum that was growing in saline-affected soils excluded Na. Positive relationships between macronutrients were recognized between P and N, between K and N, and between P and K. Al showed antagonistic relationships with P, K, Ca, Mg, Fe, Zn, Cu, and Na. Na also showed antagonistic relationships with P, K, Zn, Mn, Cu, and Al. Fe showed weak antagonistic relationships with Zn, Mn, Cu, and Al.
authors.affiliation: Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kitaku, Sapporo 060-8589, Japan.
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Osaki
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Watanabe
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ishizawa
authors.forename: Chairatna
authors.initials: C
authors.lastname: Nilnond
authors.forename: Tanit
authors.initials: T
authors.lastname: Nuyim
authors.forename: Takuro
authors.initials: T
authors.lastname: Shinano
authors.forename: Masaru
authors.initials: M
authors.lastname: Urayama
authors.forename: Sehat Jaya
authors.initials: SJ
authors.lastname: Tuah
mesh_terms: D000535:Aluminum / Q000032:analysis; D006813:Humidity; D006863:Hydrogen-Ion Concentration; D008296:Malaysia; D031650:Melaleuca / Q000737:chemistry / Q000254:growth & development; D035322:Melastomataceae / Q000737:chemistry / Q000254:growth & development; D008903:Minerals / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis; D009753:Nutritive Value; D010758:Phosphorus / Q000032:analysis; D063245:Plant Development; D018515:Plant Leaves / Q000737:chemistry*; D010944:Plants / Q000737:chemistry; D011188:Potassium / Q000032:analysis; D012964:Sodium / Q000032:analysis; D012987:Soil / Q000032:analysis*; D013785:Thailand; D014329:Tropical Climate
chemical_list: D008903:Minerals; D012987:Soil; D010758:Phosphorus; D012964:Sodium; D000535:Aluminum; D009584:Nitrogen; D011188:Potassium