Recinos C.A.,Colegio de Mexico |
Ibanez E.M.A.,Colegio de Mexico |
Arce M.M.O.,Colegio de Mexico |
Garduno R.G.,National Autonomous University of Mexico |
And 2 more authors.
Revista Mexicana De Ciencias Pecuarias | Year: 2017
An evaluation was done of productive and reproductive performance in Bos taurus (BT) x Bos indicus (BI) cattle in a dual-purpose system under tropical conditions in the state of Tabasco, Mexico. Records were from the UACH-URUSSE production unit, Teapa, Tabasco, and covered the years 1994 to 2011. Data included 492 births and 240 complete lactations of 130 Zebu or BT x BI cross cows. Seven Zebu (Z) x Holstein (H) cross genotypes were studied: 7/8Z1/8H, 3/4Z1/4H, 5/8Z3/8H, 1/2Z1/2H, 5/8H3/8Z, 11/16H5/16Z and 3/4H1/4Z. Based on BT gene proportion, these genotypes were grouped into three categories: 0-25%, 37.5-50% and 62.5-75%. Four variables were analyzed: birth weight (BW); interval between births (IBB); milk production per lactation (MPL); and length of lactation period (LLP). A higher proportion of BT genes was found to positively influence MPL (P<0.05) and LLP (P<0.01), but did not affect BW or IBB (P>0.05). The 62.5-75% category had the highest MPL (1,262.80 ± 34.80 kg), which was 8.09 % higher than the 0-25% category and 6.56 % higher than the 37.5-50% category. The 62.5-75% category also had the longest LLP (260.34 ± 11.20 d), which was 41.72 % longer than the 0-25% category and 33.68 % longer the 37.5-50% category. Of the three categories, the 62.5-75% category exhibited the best production performance, although reproductive performance did not differ between the studied genotype categories.
Cadenas-Cruz P.J.,Popular University of Chontalpa |
Oliva-Hernandez J.,Popular University of Chontalpa |
Oliva-Hernandez J.,Campo Experimental Huimanguillo Instituto Nacional Of Investigaciones Forestales |
Hinojosa-Cuellar J.A.,Popular University of Chontalpa
Journal of Animal and Veterinary Advances | Year: 2012
Data on 547 lambing records of 59 Blackbelly ewes from 1997-2004 in a commercial flock located in Centla, Tabasco and Mexico were studied to determine the productive and reproductive performance of Blackbelly ewes under grazing >6 years. Ewes were under grazing and with a marginal level of commercial feed during lactation. Reproductive management consisted of continuous exposure of ewes to ram. The date of first lambing was the beginning of the study for each ewe and the end date was determined by adding 2190 days (6 years) to the date of first lambing. The variables studied were lambing total per ewe >6 years, lambing interval interval lambing to conception, lambs born and weaned per ewe >6 years of production and number of lambs weaned per ewe considering the number of years in production or the number of lambing. Total lambing per ewe >6 years of study was 9.3±1.3. Whereas the productive performance was Lamb born and weaned per ewe >6 years of production 11.6±2.0 and 10.1±2.3, respectively. In conclusion, the number of lambing of Blackbelly ewes under grazing had effect (p<0.05) on weight of the hybrid litter at weaning and interval lambing to conception. © Medwell Journals, 2012.
Perez-Perez C.,Popular University of Chontalpa |
Hernandez-Villegas M.M.,Popular University of Chontalpa |
De La Cruz-Burelo P.,Popular University of Chontalpa |
Hernandez-Bolio G.I.,Research Center Cientifica Of Yucatan |
Bolio-Lopez G.I.,Popular University of Chontalpa
Tropical and Subtropical Agroecosystems | Year: 2014
The use of local resources for food and health care of animals is a highly profitable and sustainable strategy. Among these resources are native trees and shrubs which in addition to providing good quality nutrients, produce secondary metabolites with anthelmintic (AH) effect. Therefore the aim of this study was to evaluate the in vitro AH effect of Gliricidia sepium leaves methanol extract (GSME), through the egg hatch inhibition assay (EHA). Three concentrations of the extracts were tested: 125, 250 and 500 μg/mL. Also a negative control (distilled water) and a positive control (levamisole 2 mg/mL) were included. The GSME showed significant differences P<0.05 when compared with the positive control. The GSME also showed a dose-dependent response in inhibition of eggs hatching. Effectiveness percentages found were: 27.7%, 46.2%, 49.7% of inhibition at 125, 250, and 500 μg/mL respectively. The average dose (ED50) obtained through probit analysis was 394.96 μg/mL. These results suggest that the ME of leaves of G. sepium has anthelmintic activity against eggs of gastrointestinal nematodes.
PubMed | Autonomous University of Yucatán, Colegio de Mexico, Popular University of Chontalpa, Iowa State University and University of Veracruz
Type: Journal Article | Journal: International journal of phytoremediation | Year: 2016
An experiment was conducted in field for three years to assess the sustainability of aquatic plants Leersia hexandra, Cyperus articulatus, and Eleocharis palustris for use in the removal of total hydrocarbons of weathered oil in four areas contaminated with 60916-119373mg/kg of hydrocarbons. The variables evaluated were coverage of plant, dry matter, density of plant growth-promoting rhizobacteria, and the removal of total weathered oil. The variables showed statistical differences (p = 0.05) due to the effects of time and the amount of oil in the soil. The three aquatic plants survived on the farm during the 36-month evaluation. The grass L. hexandra yielded the greatest coverage of plant but was inhibited by the toxicity of the oil, which, in contrast, stimulated the coverage of C. articulatus. The rhizosphere of L. hexandra in control soil was more densely colonized by N-fixing bacteria, while the density of phosphate and potassium solubilizing rhizobacteria was stimulated by exposure to oil. C. articulatus coverage showed positive relationship with the removal of weathered oil; positive effect between rhizosphere and L. hexandra grass coverage was also identified. These results contributed to the removal of weathered oil in Gleysols flooded and affected by chronic discharges of crude oil.
Hernandez-Rivera M.A.,Juarez Autonomous University of Tabasco |
Ojeda-Morales M.E.,Juarez Autonomous University of Tabasco |
Martinez-Vazquez J.G.,University of Atacama |
Villegas-Cornelio V.M.,Popular University of Chontalpa |
Cordova-Bautista Y.,Juarez Autonomous University of Tabasco
Journal of Soil Science and Plant Nutrition | Year: 2011
In México, there are extensive areas polluted by oil spills. Currently, bioremediation technologies have been developed, using microorganisms to clean up oil sites. In this study, we evaluated the development of a hydrocarbonoclastic bacterial strain, using a completely randomized 3×3×4 factor arrangement: three temperatures, three pH, and four nutrients. We collected samples of soil contaminated with 3.45 × 10 5 mg kg -1 (345,000 ppm) Total Petroleum Hydrocarbons (TPH), located at the Ejido José N. Rovirosa, Huimanguillo, Tabasco, México. The samples were grown in a culture medium Nutrient Agar (NA), obtaining a bacterial strain, which was characterized and classified as Proteus sp. The strain was grown in a combined carbon culture medium and then in a liquid mineral medium with crude oil as sole carbon source. Analysis of variance and mean test were performed, using the SPSS-11.0 statistical software. The microorganisms showed the highest population growth in the treatment N 2=Triple17pH1=4.0T1=29°C with a value of 4.6 × 10 10 CFU mL -1. To reach, by bioaugmentation, the same development of Proteus sp in a conditioned soil would allow us to implement a potential bioremediation strategy for solving the problem of soils contaminated with hydrocarbons in the state of Tabasco in particular, and in Mexico in general.
Izquierdo-Hernandez J.,Colegio de Mexico |
Salgado-Garcia S.,Colegio de Mexico |
C. Lagunes-Espinoza L.D.,Colegio de Mexico |
Palma-Lopez D.J.,Colegio de Mexico |
And 3 more authors.
Sugar Tech | Year: 2016
In order to assess the nutritional and physiological response of sugarcane varieties COLPOSCTMEX 05-223, COLPOSCTMEX 06-039, RD 75-11, COLPOSCTMEX 06-271, MEX 69-290, COLPOSCTMEX 06-2362, MEX 68-P-23 COLPOSCTMEX 472, ATEMEX 96-40 and CP 72-1210 to nitrogen doses of 0, 120 and 180 kg ha−1, foliar N, P and K, chlorophyll content, photosynthesis rate (A), transpiration rate (E) and stomatal conductance (gs) were recorded for 150 days. The study was conducted in fields of sugar factory Azsuremex (IA), Tabasco, Mexico, during the growing season of 2014/2015, under rainfed conditions with Haplic (silty–eutric–calcaric) Cambisol. No variation was observed among the sugarcane varieties studied, in terms of the nitrogen doses applied, foliar N and P. Foliar K concentrations were deficient in all varieties (0.55–0.80 %). The dose of nitrogen did not affect chlorophyll concentration or photosynthesis rate in any variety, but it had an effect on gs and E. Under conditions of increasing photosynthetically active radiation, the variety ATEMEX 96-40 was performed better than the varieties COLPOSCTMEX 05-223 and RD75-11B in terms of A, gs, internal CO2 concentration (Ci) and transpiration rate (E). © 2016 Society for Sugar Research & Promotion
Aranda E.M.,Colegio de Mexico |
Georgana L.E.,Popular University of Chontalpa |
Ramos J.A.,Colegio de Mexico |
Salgado S.,Colegio de Mexico
Cuban Journal of Agricultural Science | Year: 2012
In order to evaluate the efficiency in the synthesis of microbial protein in a feed based on sugarcane with different levels of Mexican zeolite (Clinoptilolita calcica), an experiment was designed with ground stems of the Mex69-290 sugarcane cultivar, of twelve months of age. Urea (1.5 %), ammonium sulfate (0.3 %), mineral salts (0.5 %), and inoculum of lactobacilli (Vitafert) (10 %) were mixed homogeneously. Ten kilograms of the mixture were spread on the floor, with layer thickness of 10 cm. The mixture was subject to constant aeration and it was fermented under shade. A complete random design was used with factorial fit, four levels of zeolite (0, 1, 2, 3 %) and five fermentation times (0, 24, 48, 72, 96 h), with four repetitions per treatment. Nutritional variables were measured: dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), digestibility and fermentation variables, pH, NH3, acetic, propionic, butyric, and lactic acids, and the temperature. The CP at 24 h was from 16 to 21%, according to the treatment, and it decreased at the end of the fermentation. There was increasing synthesis of microbial protein, not having effect due to the addition of zeolite. The digestibility was of 50 to 60 %, without any effect due to the zeolite addition. The DM values were of 37 and 44 %, at 72 y 96 h, respectively. At the beginning, the pH was acid, and, at the end, alkaline, due to the production of lactic acid, volatile fatty acids, and ammonium. The maximum temperature was of 45 °C at 24 h. It was concluded that the zeolite had no effect on the production of microbial protein. The process of sugarcane fermentation in solid state increased the synthesis of microbial protein. After 48 h, the pH was alkaline, and at 24 h it reached the maximum temperature.
Rodriguez-Rodriguez N.,Colegio de Mexico |
Rivera-Cruz M.C.,Colegio de Mexico |
Trujillo-Narcia A.,Popular University of Chontalpa |
Almaraz-Suarez J.J.,Colegio de Mexico |
Salgado-Garcia S.,Colegio de Mexico
Water, Air, and Soil Pollution | Year: 2016
The aim of this study was to evaluate the spatial distribution of total petroleum hydrocarbons (TPH) in rhizoplane and non-rhizosphere of Leersia hexandra, known as Japanese grass, the effect of oil on the aerial biomass of L. hexandra, the population of plant growth-regulating bacteria, and microbial respiration in rhizosphere and non-rhizospheric soil. Samples of rhizosphere and soil were collected at 14 points across a surface of 2.3 ha, layer 1 (0–15-cm depth), layer 2 (15–30 cm), and layer 3 (30–70 cm), to measure TPH (mg kg−1). The spatial distribution of TPH defined four study zones (Z): Z1: 1393, Z2: 3455, Z3: 5574, and Z4: 7544. TPH were higher in underlying layers in the four zones. Zone 2 produced the largest amount of aerial biomass; oil induced hormesis in the grass, but inhibited it at doses ≥5574. For the rhizosphere of L. hexandra, it was cut with a sterilized knife, stimulated the population of N-fixing and phosphorus solubilizing, heterotrophic bacteria, as well as microbial respiration (day 1, 14, 21, 42, and 63 after incubation) in the four zones. The population of the three groups of bacteria was more stimulated by weathered oil in rhizosphere soil, compared to non-rhizosphere soil and with control treatment, suggesting that the rhizosphere system of L. hexandra has the potential to bioestimulate beneficial microbial activity in unpolluted and polluted areas compared to non-rhizosphere soil. We recommend the use of L. hexandra to recover soils degraded by weathered oil in farms located in the Mexican humid tropics. © 2016, Springer International Publishing Switzerland.
Del Carmen Rivera-Cruz M.,Colegio de Mexico |
Maldonado-Chavez E.,Popular University of Chontalpa |
Trujillo-Narcia A.,Colegio de Mexico |
Trujillo-Narcia A.,Popular University of Chontalpa
Tropical and Subtropical Agroecosystems | Year: 2012
This study assessed the effect of 150, 50000 and 78000 mg kg-1 of fresh crude oil (FO) and 78456 mg kg-1 of weathered crude oil (WO) on the growth of Brachiaria mutica and Leucaena leucocephala. The variables measured were plant height, dry biomass, nitrogen (N), phosphorus (P) and potassium (K) contents in soil and plant, density of rhizospheric bacteria and fungi, and FO and WO degradation. Statistical differences were found (P ≤ 0.05) in all variables. Leucaena leucocephala was more sensitive to oil toxicity than B. mutica. In L. leucocephala FO caused the death of the plant from the second month, while WO led to a 6-fold reduction in height. The FO had no effect on biomass accumulation of B. mutica but it reduced it in L. leucocephala, whereas WO decreased biomass in both species; N, P and K accumulation decreased in B. mutica in soil with WO and in L. leucocephala in soils with FO and WO. Density of rhizosphere bacteria was inhibited by WO in both species; there were fewer fungi in soil with FO in B. mutica and in soil with WO in L. leucocephala. Degradation of FO and WO was higher in B. mutica rhizosphere soil, so this grass may be an alternative for decontaminating soils polluted with FO and WO.
Mancillas R.G.,Colegio de Mexico |
Lopez J.F.J.,Colegio de Postgraduados |
Navarro L.A.A.,Colegio de Postgraduados |
Hernandez B.R.,Popular University of Chontalpa |
Pena A.G.,Colegio de Postgraduados
Investigaciones Geograficas | Year: 2015
The exponential growth of energy demand worldwide, the depletion of oil reserves and the severe pollutants problems caused by industry that favors greenhouse effect, evidence the need to increase the supply of oils for biodiesel production. This sets a new overview for studying non-edible oilseeds species. An alternative is barbados nut or piñon (Jatropha curcas) crop, perennial bush that is native from Mexico and Central America, grows in most of tropical countries, and it is considered like one of the non-conventional oilseed crops with great expectations for obtaining biodiesel. The barbados nut (Jatropha curcas) seeds have an outstanding characteristic: their high oil content allows converting it to liquid biofuel, and also the shell can be transformed into biogas and biofertilizers. Jatropha curcas is a green option to reforest degraded soils and to control erosion, as well as an option to diversify agricultural systems (crop rotation). On the other hand, in several scientific studies it is reported a wide variation in yields, due lack of study of plant's genetics, the agronomic handling, as well to the misunderstanding that exists in some countries in the field of zones with best agroecological ability to set the crop. The agroecological zoning (ZAE) refers to a division of land surface and weather into smaller units, that have similar characteristics related to its ability, potential yield and environmental impact. The aim of this paper is to define the zones with different agroecological abilities to set the Jatropha curcas crop, in the state of Tabasco. In order to accomplish this, four types of abilities were defined: optimal, proper, marginal by thermal or water deficit, and marginal by thermal or water excess. The agroecological zoning (ZAE) proposed in this paper defines zones based on combinations of soil, physiography, weather characteristics of temperature, rainfall and growth rate. An agroclimatic zoning is a zone with characteristics related to weather and crop systems, for our study the database of ERIC III (Extractor Rápido de Información Climatológica) was used, reporting for Tabasco a total of 93 meteorological stations. Nevertheless, only 35 stations were selected, since the other had inconsistencies in their information. From those 35 stations, a weather database was created, considering the information of historical series in a daily basis, like minimum and maximum temperatures, rainfall and evaporation (1950-2003 period). The edaphoclimatic zoning consisted in assessing the soil resource based in the units and subdivisions of soil from FAO/UNESCO system. In order to fulfill the zoning, cartographic data of soils subunits was consolidated, including texture, slope, soil depth, and its fertility, whose edaphological properties were compared to FAO's Jatropha curcas crop requirements and optimal level was assigned. The tool used for cartography elaboration was ArcMap GIS Software, which consists of computer mapping system that relates locations with agroclimatic information equal to Jatropha curcas crop requirements, which were defined like areas with ability, and according to this maps were prepared at a scale of 1:250 000 of every climatic element. The interpolation for the calculation of isolines was made by Kriging method, embedded within ArcMap software, which ease the handling and superposition of theme information layers of weather and soil. The yearly average analysis of temperature corroborated that whole Tabasco state has optimal ability and the rainfall analysis showed a surface of 2 229 631 ha with optimal ability. About soil resource there were detected 37 subunits of soil with optimal ability, adding a surface of 945 462 ha. After analyzing the maps between optimal characteristic abilities (temperature, rainfall and growth rate) and edaphological, there were detected 833 181 ha with optmial agroecological ability, therefore in the state of Tabasco is feasible the crop of this oilseed to produce biofuels.