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dc.contributor.advisorRuiz-López, Teodoro M.
dc.contributor.authorRivera-Estremera, Loures
dc.description.abstractThe experiment was conducted to determine the digestibility of hays from two accessions of rhizoma peanut (RP;17033 and 17097) and from Bermuda grass (B) as determined by the total collection method (in vivo), with nine mixed-breed lambs randomly allotted to treatments in a 3 x 3 latin square design with three repetitions. Also, the three methods for determining forage digestibility (in vivo, in vitro and in situ) were compared. Estimates of in vitro digestibility were obtained using a Daisy II incubator (48 hours). In addition, in situ digestibility using dacron bags placed (48 hours) inside the rumen of a fistulated cow fed grass hay was determined. Daily intake of dry matter (DM), organic matter (OM) and acid detergent fiber (ADF) were similar for both RP accessions and were higher (P<0.05) than B, 1.02 vs. .7442 kg/d, .9185 vs. .6782 kg/d and .3764 vs. .2774 kg/d, respectively. In vivo DM, OM, crude protein (CP), and ADF digestibility and digestible energy (DE) of both RP accessions were higher (P<0.05) than those of B. Small, but significant differences were found between the two RP accessions in favor of 17097 in digestibility of DM, OM, and neutral detergent fiber (NDF) and in favor of 17033 in CP digestibility and DE. In vivo ADF digestibility did not differ (P>0.05) between the RP accessions. In vitro and in situ DM and NDF digestibility were higher (P<0.05) for the two RP combined as compared to B (in vitro, 66.83 vs. 44.74 % e in situ, 71.63 vs. 48.12 % of DM; in vitro, 42.21 vs. 30.01 %, e in situ, 42.25 vs. 25.14 % of NDF, respectively). However, both in vitro and in situ OM digestibility differed (P<0.05) among all three hays, being greatest for RP 17033 (65.21 %). Both in vitro and in situ methods overestimated in vivo DM and OM digestibility of both RP accessions and underestimated those of B. In vivo NDF digestibility of both RP was underestimated by both in vitro and in situ methods. According to the results, the in situ method gave the best estimates of in vivo digestibility. Because of its high voluntary intake and digestibility, as determined by three methods (in vivo, in situ and in vitro), the RP demonstrated its outstanding quality potential.en_US
dc.description.abstractSe realizó un experimento para determinar la digestibilidad de henos de dos accesiones de maní rizomatoso (MR, 17033, 17097) y de hierba Bermuda (B). También, se compararon tres métodos para determinar digestibilidad (in vivo, in vitro e in situ) de los henos. La digestibilidad in vivo se determinó mediante el método de recolección total de heces con nueve ovejos machos jóvenes de raza mixta distribuidos aleatoriamente en un diseño de cuadro latino 3x3 repetido tres veces. Estimados de la digestibilidad in vitro se obtuvieron utilizando una incubadora Daisy II (48 horas). En adición, la digestibilidad in situ se determinó colocando bolsas de dacrón dentro del rumen de una vaca fistulada (48 horas) alimentada con heno de gramíneas. El consumo diario de materia seca (MS), materia orgánica (MO) y fibra detergente ácido (FDA) fue semejante entre ambas accesiones de MR y éstos superaron (P<0.05) a la B, 1.02 vs. .7442 kg/d, .9185 vs. .6782 kg/d y .3764 vs. .2774 kg/d, respectivamente. Ambas accesiones de MR mostraron mayor (P<0.05) digestibilidad in vivo de MO, MS, proteína bruta (PB), FDA y mayor contenido de energía digerible (ED) que el heno de B. Diferencias pequeñas, pero significativas (P<0.05) se encontraron entre ambas accesiones de MR siendo la accesión 17097 la de mayor digestibilidad de MS, MO y fibra detergente neutro (FDN), mientras que la 17033 fue mayor en digestibilidad de PB y ED. Sin embargo, la digestibilidad in vivo de FDA no difirió (P>0.05) entre accesiones de MR. Con los métodos in vitro e in situ la digestibilidad de MS y FDN fue mayor (P<0.05) para los dos henos de MR en comparación con el heno de B (in vitro, 66.83 vs. 44.74 % e in situ, 71.63 vs. 48.12 % para MS; in vitro, 42.21 vs. 30.01 %, e in situ, 42.25 vs. 25.14 % para FDN, respectivamente). Sin embargo, tanto la digestibilidad in vitro como in situ de la MO fue diferente (P<0.05) entre los tres henos ofrecidos, siendo mayor para el MR 17033 (65.21 %). Los métodos in vitro e in situ sobreestimaron la digestibilidad in vivo de la MS y MO de ambas accesiones de MR, pero subestimaron las de B. La digestibilidad in vivo de FDN de ambas accesiones de MR fue subestimada por los métodos in vitro e in situ. Según los resultados, el método in situ resultó ser el mejor estimador de la digestibilidad in vivo. Por lo tanto, los criterios de consumo voluntario y digestibilidad, estimados por tres diferentes métodos (in vivo, in situ e in vitro), demostraron el sobresaliente potencial de calidad del MR.en_US
dc.subjectArachis glabrataen_US
dc.subjectMateria secaen_US
dc.subject.lcshSheep--Feeding and feedsen_US
dc.subject.lcshAnimal nutritionen_US
dc.titleDeterminación de digestibilidad y consumo de materia seca de Heno de Arachis glabrata en rumiantesen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2003 Loures Rivera Estremera.en_US
dc.contributor.committeeRandel, Paul F.
dc.contributor.committeeMacchiavelli, Raúl
dc.contributor.committeeLatorre, José R.
dc.contributor.representativeBorges, Sonia Industryen_US
dc.contributor.collegeCollege of Agricultural Sciencesen_US
dc.contributor.departmentDepartment of Animal Scienceen_US

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