Degree Type

Thesis

Date of Award

2008

Degree Name

Master of Science

Department

Horticulture

First Advisor

Richard J. Gladon

Second Advisor

Gail R. Nonnecke

Third Advisor

Loren C. Stephens

Abstract

Our objective was to determine the optimal irradiance, total N concentration, and NO3--N:NH4+-N ratio for greatest edible biomass production of three cultivars of basil (Basilicum ocimum L.) in a controlled-environment production system. Preliminary experiments showed basil required a dark period, but the duration of the dark period was not resolved. Based on our results, canopy-level irradiance should not exceed 500 mumol/m2/s to conserve energy while enabling the greatest edible biomass production of basil in a controlled-environment production system. Optimal edible biomass production occurred at 100 to 250 mg N/L at a ratio of 50:50 nitrate-N : ammonium-N. All plants died in the 100% ammonium-N treatment. Regression models that allow analysis for optimum conditions suggest a nitrate-N : ammonium-N ratio of 50:50 to 75:25 yielded the greatest biomass of basil.

DOI

https://doi.org/10.31274/rtd-180813-16696

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

Angela Renee Beaman

Language

en

Proquest ID

AAI1454667

OCLC Number

277039261

ISBN

9780549686668

File Format

application/pdf

File Size

67 pages

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