Author: NICOLAS TORRES SALADO
Methanogenesis is part of the energetic metabolism of ruminants, however there are legumes that have specific characteristics, which help reduce the production of anthropogenic methane. The objective was to determine the in vitro greenhouse gas (GHG) production of tree legumes from the Mexican dry tropics.
Agricultural residues and hay pastures with more than 150 d of regrowth are characterized by their high fiber content; Pleurotus ostreatus digests lignin, cellulose and hemicellulose. The hypothesis of this study was that Pleurotus ostreatus improves the chemical characteristics and nutritional value of crop residues and pasture for animal feeding. The objective was to determine the chemical characteristics of nutritional value, biogas production and in vitro degradation of corn stubble and mulatto grass (Brachiariahybrid) treated with the MR and P15 strains of P. ostreatus for
15 and 30 d in solid fermentation.
En las zonas tropicales, las gramíneas son la principal fuente de alimentación para los rumiantes, sin embargo, las condiciones ambientales y el manejo de las praderas inciden directamente en el rendimiento y calidad de las mismas. El objetivo fue estudiar el efecto del rendimiento de los pastos híbridos de Urochloa y pasto Estrella (Cynodon plectostachyus) a diferentes frecuencias e intensidades de pastoreo, con bovinos en el trópico seco. Se evaluaron los pastos Cobra, Mulato II y Cayman (Urochloa) y pasto estrella en frecuencias de corte de 28 y 35 d, e intensidades severo y ligero de 10 y 15 cm, respectivamente, que se distribuyeron de forma aleatoria en un diseño de bloques al azar con arreglo factorial 2 x 2 con tres repeticiones. Se observó efecto del manejo en la acumulación de MS, siendo mayor la acumulación a menor frecuencia e intensidad ligera de pastoreo independientemente del pasto evaluado.
Objective: To evaluate the productive behavior of Creole sheep in the tropics fed a whole food diet that includes soybean (FS, Glycine max) fodder at different phenological stages.Methodology: The treatments T1: control, T2: 30% (SF-56 d), T3: 30% (SF-68 d), T4: 30% (SF-85 d), T5: 30% (SF-110 d) were assigned randomly to 30 male Creole sheep (15.51¿1.6 kg LW). The experiment lasted 56 d. The variables evaluated were: dry matter intake (DMI), daily weight gain (DWG) and feed conversion (FC). The experimental design was completely randomized and the averages of the treatments were compared using the Tukey test.
Objective: To evaluate the productive variables and the digestibility of the nutrients of an integral diet for lambs with
increasing inclusion of Samanea saman pods. Design/methodology/approach: 24 creole lambs (initial weight of 20.6¿0.3 kg) distributed in a completely randomized experimental design were used. The treatments were: T1, 0%, T2, 12.5%, and T3, 25% of Samanea saman pod inclusion. The productive variables and the digestibility of the nutrients were evaluated and compared with the Tukey test (¿¿0.05); meanwhile, the response to the increasing content of Samanea saman was evaluated by orthogonal contrasts. The variables dry matter intake (DMI), daily weight gain (DWG) and feed conversion (FC) showed no differences (p¿0.05)between treatments.
Pumpkin pulp shell (PPS) is an agricultural by-product with contaminating potential that can be used to ensile. The objective of this study was to determine the quality and bromatological characteristics of ensilages made with PPS, pangola grass hay, urea and two percentages of fermented molasses during 14 and 21 days.
PAULINO SÁNCHEZ-SANTILLÁN NICOLAS TORRES SALADO ADELAIDO RAFAEL ROJAS GARCIA MARIA BENEDICTA BOTTINI LUZARDO MARIA DE LOS ANGELES MALDONADO PERALTA JOSE CARLOS ESCOBAR ESPAÑA IVAN REYES VAZQUEZ JERÓNIMO HERRERA-PÉREZ (2019)
Nutritional blocks (NB) are a supplement strategy for ruminants, and regional food ingredients such as mango (Mangifera indica L.) are included in their preparation. Due to its rapidly fermentable sugars, mango pulp (MP) may be used to substitute sugar cane molasses in the elaboration of NB. The objective of the present experiment was to evaluate the kinetic of gas production in vitroand the fermentative characteristics of the partial substitution of sugar cane molasses (Saccharum officinarum L.) with MP in the elaboration of NB. The experimental design was completely
randomized and the treatments were MP0, MP10, MP20 and MP30, which was the level of substitution of molasses with MP. The variables determined in the sample of each treatment were: dry matter (DM), crude protein, ash, neutral detergent fiber (NDF) and acid detergent fiber (ADF).
The objective was to evaluate the in vitro fermentation in silage of ripe mango with pangola grass hay and levels of sugar cane molasses as additive. The treatments were: 0 (T0%), 3 (T3%), 6 (T6%) and 9% (T9%) molasses. The ensilage was fermented for 21 days. Dry matter (DM), pH values, lactic acid, crude protein (CP), neutral detergent fiber
(NDF), acid detergent fiber (ADF), and ashes (As), partial and the accumulated biogas and methane production, DM degradation (DMD) and NDF degra dation (NDFD) were determined in the ensilages. Variables were analyzed in a completely random design.
Alfalfa (Medicago sativa L.) is the most important legume forage for dairy cattle feed in Mexico. The objective of this
study was to assess the productive response of five varieties of alfalfa in cutting intervals defined seasonally. Our hypothesis was that the San Miguelito variety is the most productive among the evaluated varieties. The varieties San Miguelito, Júpiter, Atlixco, Vía láctea and Cuf 101 were randomly distributed in 20 experimental plots of 12¿9 m, in a
completely randomized blocks design with four replications. Evaluations included yield feed, leaf:stem ratio, weight per
stem, stem population per m2, plant population per m2 and botanical and morphological composition. Júpiter and Cuf
101 showed the highest yield (20 275 and 13 350 kg MS ha¿1). Leaf:stem ratio was higher in Cuf 101 and smaller in Júpiter. The weight per stem was higher in Júpiter and lower in Cuf 101.
Influence of testa on endocarp imbibition of Malpighia mexicana and (Byrsonima crassifolia) (Malpighiaceae). Water uptake of seeds is a fundamental internal biochemical activation process.