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Agroforestry Systems

, Volume 33, Issue 2, pp 165–175 | Cite as

Vesicular-arbuscular mycorrhiza effects on Gliricidia sepium and Senna siamea in a fallowed alley cropping system

  • I. E. Okon
  • O. Osonubi
  • N. Sanginga
Article

Abstract

Nitrogen fixing and non-N2 fixing legumes such as Gliricidia speium and Senna siamea have been used in alley cropping systems for soil improvement and source of N for food crops. However their establishments could be limited by P and moisture deficiencies in degraded soils. Vesicular-arbuscular mycorrhizal fungi can help to overcome these deficiencies. We examined the effects of a vesicular-arbuscular mycorrhizal (VAM) fungus, Glomus deserticola, on the performance of sole hedgerow trees of Gliricidia sepium and Senna siamea and their mixtures (interplanted) in a fallowed alley cropping experiment on a degraded Alfisol in southwestern Nigeria. Percentage root infection by VAM fungi was higher in inoculated plants than in uninoculated ones irrespective of whether they were interplanted or non-interplanted. Inoculation with G. deserticola increased dry matter accumulation and nutrient uptake (N. P, Mg and K) but there was no significant interaction between mycorrhizal inoculation and interplanting for growth and nutrient uptake except for the uptake of P, Mg and K in G. sepium. Inoculation with G. deserticola reduced leaf shedding of G. sepium by 50% but did not have the same effect for S. siamea. For both tree species inoculated plants extracted more water from 0–30 cm depth than the uninoculated ones.

Key words

tree legumes nutrient uptake VAM inoculation Glomus deserticola water extraction 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • I. E. Okon
    • 1
  • O. Osonubi
    • 1
  • N. Sanginga
    • 2
  1. 1.Department of Botany and MicrobiologyUniversity of IbadanIbadan
  2. 2.International Institute of Tropical Agriculture (IITA)IbadanNigeria

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