Author: JERONIMO HERRERA PEREZ
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.
"El Objetivo de Esta Investigación Fue Estudiar la variabilidad Genetica de Gusano Soldado Spodoptera Frugiperda Smith & Abbot (Lepidóptera: Noctuidae) apartir de Larvas de Poblaciones recolectadasen cutivos de Maiz(Poales:Poaceae) de Dictintas Localidades (Sinaloa,Jalisco Coahuila y Durango de Mexico bajo Diferentes Tipos de manejo del Cultivo, Utilizando marcadores moleculares tipo ISSR. Estos marcadores amplificadoron un total de 105 loci de los Siendo el 92.59% poliformicos, lo cual Permitio caracterizar las poblaciones genéticamente y relacionar esta variabilidad con factores como estrategias de control de la plaga la Población mas Diferenciada población 7, fue la Tlajomulco, Jalisco; la localidad con uso mas Intensivo de Insecticidas Quimicos como Diversos modosde acción, lo que puede explicar gran parte de las diferencias de variabilidad genetica observada entre sitios en este estudio."
"The objective of this research was to study the genetic variability of Worm Spodoptera Frugiperda Smith & Abbot (Lepidoptera: Noctuidae) from Larvae of Populations collected in corn cuttings (Poales: Poaceae) from Dictintas Localidades (Sinaloa, Jalisco Coahuila and Durango from Mexico under Different types of crop management, using molecular markers type ISSR.These markers amplified a total of 105 loci of the being 92.59% polymorphic, which allowed to characterize the populations genetically and relate this variability with factors such as control strategies of the pest Population More differentiated population 7, was the Tlajomulco, Jalisco, the locality with more intensive use of chemical insecticides as diverse modes of action, which can explain much of the differences in genetic variability observed between sites in this study."
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.
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.
ADELAIDO RAFAEL ROJAS GARCIA MARIA DE LOS ANGELES MALDONADO PERALTA PAULINO SANCHEZ SANTILLAN SERGIO IBAN MENDOZA PEDROZA PERPETUO ALVAREZ VAZQUEZ JERONIMO HERRERA PEREZ ALFONSO HERNANDEZ GARAY (2018)
Ruminant production in the tropics is based primarily on native and introduced grass (Poaceae) grazing. The effect of the regrowth age and cutting intensity of Brachiaria hybrid cv Cobra grass was evaluated, and the nutritional value when varying the frequency and intensity of 10 and 15 cm of cutting in the dry season. The study period was from January 19 to March 30, 2017. The variables were dry matter yield, morphological composition, raw protein (RP), neutral detergent fiber (NDF), and acid detergent fiber (ADF). The highest yield was obtained after 56 days in the intensity of 15 cm with 2550 kg MS ha¿1; however, the highest volume of leaves was reached at 35 days with 1200 kg MS ha¿1. The maximum content of Cobra grass RP was in the frequency at seven days with 19.3% in the leaf
component, decreasing as the evaluation time went by. The NDF and ADF content increased with the age of the regrowth.
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.
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.
To determine in vitro fermentation of cellulolytic ruminal bacterial consortia (CBC) preserved by lyophilization using activated carbon, maltose and lactose as preservatives.
Influence of testa on endocarp imbibition of Malpighia mexicana and (Byrsonima crassifolia) (Malpighiaceae). Water uptake of seeds is a fundamental internal biochemical activation process.
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).