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Related Experiment Videos

Nutrient management effects on sweetpotato genotypes under controlled environment.

P P David1, C K Bonsi, A A Trotman

  • 1George Washington Carver Agricultural Experiment Station, Tuskegee University, AL 36088, USA.

Acta Horticulturae
|December 1, 1996
PubMed
Summary

Optimizing nutrient solution for sweetpotato growth in closed systems is key. Larger containers improved storage root dry mass and nutrient uptake, despite similar water uptake across sizes.

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Area of Science:

  • Agricultural Science
  • Space Biology
  • Plant Physiology

Background:

  • Sweetpotato is a NASA-recommended crop for bioregenerative life support systems.
  • Optimizing nutrient solution management is crucial for closed-system crop production.
  • Current protocols involve discarding nutrient solutions, necessitating waste reduction strategies.

Purpose of the Study:

  • To evaluate the impact of nutrient solution container size on sweetpotato growth under a replenishment protocol.
  • To assess sweetpotato genotype adaptability in controlled bioregenerative environments.
  • To determine optimal nutrient management for maximizing yield and resource efficiency.

Main Methods:

  • Experiments were conducted in an environmental growth room using a closed nutrient film technique.

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  • Sweetpotato genotypes were grown from vine cuttings in small and large nutrient solution containers.
  • Nutrient replenishment involved daily water top-off and nutrient addition based on electrical conductivity (EC).

    • Main Results:

    • Container size did not significantly affect storage root yield, foliage mass, leaf area, or vine length.
    • Larger nutrient solution containers resulted in greater storage root dry mass accumulation.
    • Plants in larger containers exhibited higher overall nutrient uptake, despite greater water uptake in smaller containers.

    Conclusions:

    • Nutrient solution container size influences sweetpotato biomass accumulation and nutrient uptake in closed systems.
    • A nutrient replenishment protocol can be effective, but container volume impacts resource utilization.
    • Genotype-specific responses highlight the need for tailored cultivation strategies in space agriculture.