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Effects of native vesicular–arbuscular mycorrhizal fungi and phosphate fertilizer on red clover growth in acid soils

Published online by Cambridge University Press:  27 March 2009

Maria J. Sainz
Affiliation:
Unidad Estructural de Fertilidad de Suelos y Nutrition Vegetal, Institulo de Investigaciones Agrobioldgicas de Galicia (CSIC), Apartado 122, 15080–Santiago de Compostela, Spain
J. Arines
Affiliation:
Unidad Estructural de Fertilidad de Suelos y Nutrition Vegetal, Institulo de Investigaciones Agrobioldgicas de Galicia (CSIC), Apartado 122, 15080–Santiago de Compostela, Spain

Summary

The effect of P applications and native vesicular-arbuscular mycorrhiza (VAM) on the growth and P nutrition of red clover plants was studied in two acid hill soils with similar edaphic characteristics.

Mycorrhizal and non-mycorrhizal plants were compared under sterilized soil conditions. Plant growth increased on P addition in both soils, but the effect of mycorrhiza in improving drymatter production and P uptake was significant only in one of the soils. Fourteen and twenty-five mg/kg Olsen-P were needed in this soil to obtain the same yields by mycorrhizal and non-mycorrhizal plants, respectively. Results are explained in terms of a different effectiveness of the two fungal populations, and the possible effect of the soil sterilization process on percentage VAM infection is discussed.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1988

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