Resumo

VALDES RESTREPO, Magda Piedad; ORTIZ GRISALES, Sanín  e  SANCHEZ, Teresa. Plant morphology, yield and quality of sagú starch. Acta Agron. [online]. 2010, vol.59, n.3, pp.372-380. ISSN 0120-2812.

For Colombian people the edible fruit of Sagú Maranta arundinacea are the rhizome. This is used in an informal way by their starch in different products elaboration for human feeding. However, their agronomy is unknown. Plant propagation, dais to rhizome harvest, native starch production and chemical and phytochemical of the integral plant was analyzed. The cultivation settled down to open sky with 0.5x1.0 m. inside furrow and among furrows respectively. Uses descriptive statistic for the quantitative data (central tendency measures, of variation and of deviation). He mature plant reached a height among 50 y 75 cm. and a yield of fresh rhizome among 1.46 to 1.94 kg.plant^-1. The crop index oscillates among 0.06 to 0.60. The native starch surrendered by the fresh rhizome fluctuated among 7.2 y 8.1%. The composition of the rhizome was 22.3; 7.4; 3.62; 1.02; 6.98 y 80.9% for DM, CP, CF, FNE and Ash respectively. The available fresh forage was negative for phytochemical tests and it presented 41.3; 22.0; 22.5; 15.06; 57.13; 32.3; 9.2; 23.13 y 24.8% for DM, CP, CF, ash, NDF, ADF, lignin, cellulose y hemicellulose respectively. The Relative feed value (RFV) was 103.0. The granulate was ellipsoidal of 8 µm of diameter and compound for 20.54% amylose and 79.46% amylopectin, that it generates an opaque and resistant pasta to the retro gradation. The final temperature of jellification was 73° C, the maximum viscosity of the pasta was of 220 Brabender units (B. U.), presenting a defined pick of viscosity and later conservation of the trajectory with stability in the time. The index of solubility and absorption of water was 1.23 y 2.8% respectively.

Palavras-chave : Marantaceae; rhizomes; starch; nutritive value; quality.

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