Get access

Nutritional, Physical, and Sensory Evaluation of Hydroponic Carrots (Daucus carota L.) from Different Nutrient Delivery Systems

Authors

  • P.N. Gichuhi,

    1. Authors Gichuhi, Bromfield, and Bovell-Benjamin are with Dept. of Food and Nutritional Sciences, 204 Campbell Hall and author Mortley is with Dept. of Agriculture, 204 Milbank Hall, Tuskegee Univ., Tuskegee, AL 36088, U.S.A. Direct inquiries to author Bovell-Benjamin (E-mail: acbenjamin@tuskegee.edu).
    Search for more papers by this author
  • D. Mortley,

    1. Authors Gichuhi, Bromfield, and Bovell-Benjamin are with Dept. of Food and Nutritional Sciences, 204 Campbell Hall and author Mortley is with Dept. of Agriculture, 204 Milbank Hall, Tuskegee Univ., Tuskegee, AL 36088, U.S.A. Direct inquiries to author Bovell-Benjamin (E-mail: acbenjamin@tuskegee.edu).
    Search for more papers by this author
  • E. Bromfield,

    1. Authors Gichuhi, Bromfield, and Bovell-Benjamin are with Dept. of Food and Nutritional Sciences, 204 Campbell Hall and author Mortley is with Dept. of Agriculture, 204 Milbank Hall, Tuskegee Univ., Tuskegee, AL 36088, U.S.A. Direct inquiries to author Bovell-Benjamin (E-mail: acbenjamin@tuskegee.edu).
    Search for more papers by this author
  • A.C. Bovell-Benjamin

    1. Authors Gichuhi, Bromfield, and Bovell-Benjamin are with Dept. of Food and Nutritional Sciences, 204 Campbell Hall and author Mortley is with Dept. of Agriculture, 204 Milbank Hall, Tuskegee Univ., Tuskegee, AL 36088, U.S.A. Direct inquiries to author Bovell-Benjamin (E-mail: acbenjamin@tuskegee.edu).
    Search for more papers by this author

Abstract

ABSTRACT:  Carrot (Daucus carota L.) has the highest carotenoid content among foods and is consumed in large quantities worldwide, while at the same time its market demand continues to increase. Carotenoids have also been associated with protective effects against cancer and other chronic diseases. The most predominant carotenoids in carrots are β- and α-carotenes. Moisture, ash, fat, texture, color, carotene content, and consumer acceptance of carrots grown in a hydroponic system with nutrient film technique (NFT) and microporous tube membrane system (MTMS) were evaluated. The moisture contents of the NFT- and MTMS-grown carrots ranged from 86.8 ± 0.13% to 92.2 ± 2.25% and 80.9 ± 0.31% to 91.6 ± 1.01%, respectively. Fat and ash contents of the carrots were negligible. NFT-grown Oxheart had the most β-carotene (9900 ± 20 μg/100 g) while Juwaroot had the least (248 ± 10 μg/100 g). However, the β-carotene content of Juwaroot from the NFT batch II carrots was 3842 ± 6 μg/100 g. MTMS-grown carrots had less variation in the total β-carotene contents (2434 ± 89 to 10488 ± 8 μg/100 g) than those from NFT. Overall, Nantes Touchan (4.8 ± 2.3) and Nevis-F (7 ± 1.4) from NFT were the least and most preferred by consumers. Mignon was also acceptable to consumers, and significantly (P < 0.05) more preferred than the other carrots in that NFT batch. MTMS-grown Kinko and Paramex, which were significantly (P < 0.05) more preferred than Nandrin-F and the commercial field-grown carrot, were equally liked by consumers. Nevis-F, Mignon (NFT), Paramex, and Kinko (MTMS) are potentially good cultivars to be included in NASA's food system.

Get access to the full text of this article

Ancillary