Author: SANTIAGO JOAQUIN CANCINO

Acumulación de forraje de pasto buffel e híbridos de Urochloa a diferente edad de rebrote

SANTIAGO JOAQUIN CANCINO (2018)

Se evaluaron diferentes cultivares de Urochloa (Insurgente, Cayman, Cobra y Mulato II) y pasto buffel H-17 (como testigo) a diferente edad de rebrote (ER), durante la época de máxima (EMAP) y mínima precipitación (EMIP).

Article

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA Brachiaria híbrido CIAT 36087 1752 1794 Pennisetum ciliare H-17

Dinámica de crecimiento de cultivares de Urochloa brizantha Kunth y Megathyrsus maximus (Simon

&

Jacobs), a diferente frecuencia de corte

SANTIAGO JOAQUIN CANCINO (2014)

Tesis (Doctorado en Ciencias, especialista en Ganadería).- Colegio de Postgraduados, 2014.

El objetivo del estudio fue determinar la producción estacional y anual de forraje, composición morfológica, características estructurales y dinámica de ahijamiento de praderas de pasto Insurgente, Toledo, Tanzania y Mombaza, cosechados a tres frecuencias de corte (FC; 4, 5 y 6 semanas), durante las épocas de nortes, sequía y lluvias. Se utilizó un diseño de bloques completos al zar, con cuatro repeticiones y arreglo de tratamientos en parcelas divididas, donde la parcela mayor fueron los cultivares y la menor las frecuencias de corte. Los cultivares se sembraron a distancia de 50 x 50 cm entre plantas y surcos, respectivamente. El tamaño de parcelas fue de 10 m2. El área de muestreo fueron los dos surcos centrales, los cuales se dividieron en 3 subparcelas de 1 m2, se dejaron dos macollos entre cada subparcela en los extremos de los surcos centrales. Todos los pastos evaluados presentaron mayor dinámica en la acumulación de forraje y ahijamiento durante la época de lluvias. La mayor acumulación de forraje se obtuvo con la FC de 6 semanas, donde el mayor valor (13, 279 kg MS ha-1) se registró en Tanzania, seguido de Insurgente, Mombaza y Toledo, con promedio de 11, 337, 11, 237 y 10, 713 kg MS ha-1, respectivamente. El pasto Tanzania también presentó la mayor tasa de crecimiento, con 37 kg de MS ha-1 día-1, seguido de Insurgente, Mombaza y Toledo, con valores de 32, 31 y 29 kg MS ha-1 día-1, respectivamente. La mayor proporción de hojas se obtuvo con Mombaza y Tanzania con valores de 93 y 92 %, respectivamente y la menor cantidad de hoja se registró para Toledo (85 %). La mayor altura de planta fue para Mombaza (50 cm), seguido de Toledo, Tanzania e Insurgente, con valores de 46 43 y 35 cm, respectivamente. La proporción de hoja disminuyó de la frecuencia de corte de 4 a 6 semanas. Para mejorar la eficiencia en la producción de forraje y disminuir la acumulación de tallo, la frecuencia de corte recomendada es: en Insurgente y Toledo cada 5 semanas, durante las tres épocas; en Mombaza cada 4, 4 y 5 semanas, en Tanzania cada 5, 5 y 5 semanas, durante la época de nortes, sequía y lluvias, respectivamente. _______________ REGROWTH DYNAMICS OF CULTIVARS OF Urochloa brizantha Kunth, AND Megathyrsus maximus (Simon & Jacobs), TO DIFFERENT CUTTING FRECUENCY. ABSTRACT: The objective of the study was to evaluate the seasonal and annual production herbage, morphological composition, structural characteristics and dynamics of tillering of swards grass Insurgente, Toledo, Tanzania and Mombaza, harvested at three frequencies (FC, 4, 5 and 6 weeks), during the norts, drought and rains. A complete randomized block design was used, with four replicates and split plots treatments arrangement, where the main plot were the cultivars and the lower the cutting frequencies. Cultivars were planted within distance of 50 x 50 cm between plants and rows, respectively.The size of plots was 10 m2.The sampling area were the two central rows, which were divided into 3 subplots of 1 m2, two tillers were left between each subplot on the ends of the central rows. All the evaluated grasses showed greater dynamics in the herbage accumulation and tillering during the rainy season. Greater herbage accumulation was obtained with the FC of 6 weeks, where the highest value (13, 279 kg DM ha-1) was recorded in Tanzania, followed by Insurgente, Mombaza and Toledo, with average of 11, 337, 11, 237 and 10, 713 kg DM ha-1, respectively. Pasture Tanzania also presented the highest rate of growth, with 37 kg DM ha-1 day-1, followed by Insurgente, Mombaza and Toledo, with values of 32, 31 and 29 DM kg ha-1 day- 1, respectively. The highest proportion of leaves was obtained with Mombaza and Tanzania with values of 93 and 92%, respectively, and the least amount of leaf was recorded for Toledo (85%). Greater plant height was to Mombaza (50 cm), followed by Toledo, Tanzania and Insurgente, with values of 46, 43 and 35 cm, respectively. The proportion of leaves decreased from the cutting frequency of 4 to 6 weeks. To improve efficiency in the production of fodder and reduce the accumulation of stem, the preferred cutting frequency is: in Insurgente and Toledo every 5 weeks, during the three seasons; in Mombaza every 4, 4 and 5 weeks in Tanzania every 5, 5 and 5 weeks, during the period of norts, drought and rainfall, respectively.

Doctoral thesis

Pastos tropicales Defoliación Acumulación de forraje Ahijamiento Tropical grasses Defoliation Herbage accumulation Tillering Ganadería Doctorado CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA

Producción y cambios morfológicos de Pennisetum ciliarecv. H-17en función de la edad de rebrote y altura de pradera

Yield and morphological changes of Pennisetum ciliarecv. H-17 depending on age of regrowth and prairie height

JONATHAN RAUL GARAY MARTINEZ SANTIAGO JOAQUIN CANCINO BENIGNO ESTRADA DROUAILLET JUAN CARLOS MARTINEZ GONZALEZ ANDRES GILBERTO LIMAS MARTINEZ (2019)

Se evaluó la producción de materia seca (MS) y composición morfológica en función de la edad de rebrote (ER; cuatro, seis y ocho semanas) y altura de pradera (AP) en Pennisetum ciliare cv. H-17, durante época de lluvias (ELL) y seca (ES). Las variables fueron MS total (MSTT), hoja (MSh), tallo (MSt), material muerto (MSmm) y AP. Se utilizó un diseño completamente al azar con cuatro repeticiones y análisis de regresión lineal. Durante ELL, la MSTT fue similar (p> 0.05) entre ER (8342 kg ha-1)y disminuyó 90% en la ES. Durante ELL, se presentó mayor (p< 0.05) MSh a cuatro semanas, mientras que a ocho se presentó mayor MSt y MSmm. La MSt y MSmm se manifestaron cuando la AP fue de 34 cm y 47 cm, respectivamente. La ER y AP tuvieron efecto significativo en el rendimiento y comportamiento estructural de MS en Pennisetum ciliare cv. H-17

Dry matter production (DM) and morphological composition were evaluated according to regrowth age (RA; four, six, and eight weeks) and prairie height (PH) in Pennisetum ciliarecv. H-17, during rainy season (RS) and drought (DS). The variables were total MS (TDM), leaf (LDM), stem (SDM), dead material (DMDM) and PH. A completely randomized design with four repetitions and linear regression analysis was used. During RS, the TDM was similar (p> 0.05) between RA (8342 kg ha-1) and decreased 90% in DS. During RS, there was greater (p< 0.05) LDM at four weeks, while at eight there was greater SDM and DMDM. The SDM and DDM were manifested when the PH was 34 cm and 47 cm, respectively. The RA and PH had a significant effect on the performance and structural behavior of DM in Pennisetum ciliarecv.H-17

Article

CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA Tasa de crecimiento Época de lluvias; Época de sequía Índice de área foliar Área foliar específica Growth rate Rainy season Dry season Specific leaf area

Productivity of orchard grass (Dactylis glomerata L.) alone and associated with perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.)

MARIA DE LOS ANGELES MALDONADO PERALTA ADELAIDO RAFAEL ROJAS GARCIA NICOLAS TORRES SALADO JERÓNIMO HERRERA-PÉREZ SANTIAGO JOAQUIN CANCINO JOEL VENTURA RIOS ALFONSO HERNANDEZ GARAY FILOGONIO JESUS HERNANDEZ GUZMAN (2017)

The objective of this research was to evaluate the productive capacity of orchard grass alone and associated with perennial ryegrass and white clover sown at different proportions. Treatments consisted of the following associations and monoculture: 100-00-00, 70-20-10, 50-00-50, 40-40-20, 40-20-40, 20-70-10, 20-40-40, and 00-50-50% of orchard grass, perennial ryegrass, and white clover, respectively.

Article

Association Grasses Legumes Performance CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA CIENCIAS AGRARIAS OTRAS ESPECIALIDADES AGRARIAS

In vitro gas production kinetics and degradability of a diet for growing lambs: effect of fibrolytic enzyme products at different dose levels

DANIEL LOPEZ AGUIRRE JAVIER HERNANDEZ MELENDEZ ROLANDO ROJO RUBIO FERNANDO SANCHEZ DAVILA NICOLAS LOPEZ VILLALOBOS Abdelfattah Zeidan Mohamed Salem José Fernando Vázquez Armijo SALOMON SANCHEZ RUIZ SANTIAGO JOAQUIN CANCINO (2016)

The objective of this study was to evaluate the effects of three fibrolytic enzyme products (cellulase (CEL), xylanase (XYL) and a 1:1 mixture of CEL and XYL (MIX)) at three dose levels (0, 1 and 3 lL/0.5 g DM) on the in vitro fermentation of a diet for growing lambs. Bottles were incubated for 96 h at 39 C. A mathematical model was used to estimate the parameters describing the gas production (GP) curve (b, c and L). Dry matter degradability (DMD) and fibre (NDFD and ADFD) degradability were determined at the end of the incubation period. Metabolisable energy (ME) and short chain fatty acids (SCFA) were calculated at 24 h of incubation. The asymptotic GP (parameter b) was affected (p<0.02) by enzyme product and dose level, with a significant linear response (p<0.05). Dose level affected ME and SCFA with a significant linear (p<0.05) and quadratic (p<0.01) response. The interaction between enzyme product and dose level was significant (p<0.05) for cumulative GP up to 72 and 96 h of incubation, pH, ADFD and DMD. The results suggest that application of exogenous cellulases has the potential to alter asymptotic GP and degradability of ADF and DM of a diet for growing lambs, but most of the results depend on the interaction between enzyme product and dose level. Future studies are required to determine the ideal combination between enzyme product and dose level for optimal degradation of ruminant feeds.

Article

Degradability exogenous enzymes gas production kinetics lambs BIOLOGÍA Y QUÍMICA