Determinación de parámetros de calidad en maíces nacionales e importados y evaluación en raciones balanceadas para pollos de engorde y gallinas de postura

Corn (Zea mays) is one of the largest cereal crops worldwide, being second only after wheat. Corn is used not only as human food and animal feed, but also in several industrial processes. In Colombia, corn production falls short to cover the country needs, making it necessary to import large amounts...

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Autores:: Aguillón Páez, Yandy Johanna

Tipo de recurso:: Work document

Fecha de publicación:: 2020

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: spa

Description
Summary:	Corn (Zea mays) is one of the largest cereal crops worldwide, being second only after wheat. Corn is used not only as human food and animal feed, but also in several industrial processes. In Colombia, corn production falls short to cover the country needs, making it necessary to import large amounts, specially from the United States. Since locally grown corn is more expensive than imported corn, it is necessary to investigate whether the local corn could be better than the imported in terms of grain quality and/or presence of natural contaminants. The objective of the present work was to evaluate and compare the quality and mycotoxin content of the locally grown corn with the imported corn, and to evaluate the effects of formulating poultry diets with locally grown vs. imported corn. The quality control studies revealed some features favoring the locally grown corn, including a smaller content of impurities and broken kernels, a larger dry matter content and a larger content of apparent metabolizable energy. Further, two mycotoxins (deoxynivalenol and zearalenone) were detected in the imported grain samples that were not found in the local corn samples. The biological assays also showed some differences in favor of the local grain: in laying hens, trends and/or statistical differences were found for egg weight, feed conversion rate, egg mass and Haugh units; in broiler chickens a better feed conversion rate was found, although the breast yield was lower. The studies conducted show the importance of conducting periodic quality control evaluations of the imported corn, and the need to conduct more studies in which corn is evaluated in longer production cycles.

Determinación de parámetros de calidad en maíces nacionales e importados y evaluación en raciones balanceadas para pollos de engorde y gallinas de postura

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