Abstract
AbstractA greenhouse experiment compared growth and mineral nutrition of mycorrhizal and non‐mycorrhizal seedlings of Acer pseudoplatanus on a fumigated soil. The effects of mycorrhizal inoculation were examined at six rales of soluble phosphate and five rates of non‐soluble phosphate. Inoculation with Glomus mosseae markedly stimulated phosphorus uptake and growth only at the lowest level of soluble phosphorus. With 200 ppm of added monocalcium phosphate mycorrhizal infection depressed growth and considerably modified the relationships between yield and phosphorus concentration in plant tissues. The possible causes of growth depression at high level of added soluble phosphorus are discussed.
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