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Using Tithonia diversifolia (Hemsl.) Gray in a Short Fallow System to Increase Soil Phosphorus Availability on a Costa Rican Andosol

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  • Pedro Jorge Mustonen
  • Maren Oelbermann
  • Donald Kass

Abstract

This study evaluated aboveground pruning biomass production in a naturally regenerated fallow (NF), and in monoculture with a leguminous species (CF), and a non-leguminous species (TF) on an Andosol in Costa Rica. The effect of pruning biomass removal or addition on bean grain yield and soil P fractions was also evaluated. Biomass production and nutrient input was significantly greater (p>0.05) in the TF treatment. Macronutrient content of the pruned biomass was not significantly different (p>0.05) between treatments, but C/N and C/P ratios were significantly lower (p>0.05) in the CF treatment. Bean grain yields were significantly greater (p>0.05) only when TF biomass was added to the soil as mulch. There was no significant difference (p>0.05) in the amount of P in the labile and potentially labile fractions between treatments, and the inter-conversion mechanisms between non-labile soil P and labile fractions occurred in diverse directions, not necessarily following the inverse strength sequence of the Hedley P fractionation procedure.

Suggested Citation

  • Pedro Jorge Mustonen & Maren Oelbermann & Donald Kass, 2012. "Using Tithonia diversifolia (Hemsl.) Gray in a Short Fallow System to Increase Soil Phosphorus Availability on a Costa Rican Andosol," Journal of Agricultural Science, Canadian Center of Science and Education, vol. 4(2), pages 1-91, February.
    • Handle: RePEc:ibn:jasjnl:v:4:y:2012:i:2:p:91
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    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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