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Effect of fertilizer application on the yield, protein and fat content, and protein quality of raw and cooked grain of three amaranth species

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Abstract

Four selections of three amaranth species were used in the study:A. cruentus (US Rodale 82S-1034),A. hypochondriacus (US Rodale 81S-1024).A. caudatus (Cusco, Peru CAC-2002) andA. cruentus (GUA-17). These were fertilized with levels of 0, 30, 60 and 90 kg/ha of a 12-24-12 fertilizer formulation applied to experimental plots 3×4m2 in four replications. The harvested grain was used for protein and fat analysis, and for protein quality evaluations on raw and on heat processed samples.A. cruentus (US) andA. hypochondriacus flowered at 43–44 days at 60 and 43cm, respectively,A. caudatus (Peru) at 51 days and 65cm, andA. cruentus (Gua) at 50 days and 80cm height. Days at harvest varied from 100 to 129 days at heights of 125 to 180cm. Yield of grain fromA. hypochondriacus (US) andA. cruentus (Gua) was higher than forA. cruentus (US) andA. caudatus, but did not differ for each pair. although not influencing yield, the application of fertilizer increased protein content forA. caudatus (Peru) from 12.35 to 14.50%; but not the protein content of the other selections. The fat content was affected differently in all four selections. The application of fertilizer did not affect protein quality either in raw or processed grain. On the other hand, processing increased protein quality, food intake, and animal performance significantly most clearly seen withA. cruentus (US) andA. caudatus (Peru) and to a lesser extent forA. hypochondriacus (US) andA. cruentus (Gua)). The data obtained showed inconsistent effects on yield and chemical composition, and no effect on protein quality with fertilizer application.

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Authors and Affiliations

  1. Division of Agricultural Sciences, Institute of Nutrition of Central America and Panama (INCAP), P.O. Box 1188, Guatemala, Central America

    Ricardo Bressani, Jorge Mario Gonzalez, Luiz G. Elias & Mario Melgar

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  1. Ricardo Bressani
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  2. Jorge Mario Gonzalez
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  3. Luiz G. Elias
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  4. Mario Melgar
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Bressani, R., Gonzalez, J.M., Elias, L.G. et al. Effect of fertilizer application on the yield, protein and fat content, and protein quality of raw and cooked grain of three amaranth species. Plant Food Hum Nutr 37, 59–67 (1987). https://doi.org/10.1007/BF01092301

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  • DOI: https://doi.org/10.1007/BF01092301

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