Revista Agro Productividad
Not a member yet
    1940 research outputs found

    Year-long evaluation of total soluble proteins in the trunk of two pine species from northeastern Mexico

    Get PDF
    Objective: To quantify the one-year total soluble protein (TSP) concentration in the trunk of two pine species. Design/Methodology/Approach: The Bradford method (1976) was used to determine the TSP concentration in the two pine species. Statistical tests were subsequently performed with the IBM SPSS 18 Software, using a general linear model (GLM) univariate analysis. Results: The TSP concentration was different for each month. The highest concentration was recorded in August (6.84 mg gMS-1 for Pinus pinceana Gordon and 6.82 mg gMS-1 for Pinus cembroides Zucc), and the lowest was registered in April (5.53 mg gMS-1 for Pinus cembroides Zucc) and February (6.64 mg gMS-1 for Pinus pincenana Gordon). Study Limitations/implications: There is a lack of information regarding these two pine species and scarce studies explain the behavior of the TSP. Conclusions: The concentration of total soluble proteins varies in each month of the year. Further studies that include more plant organs are required to obtain a broader protein profile for both species

    Insecticide resistance level of Aedes aegypti L. (Diptera: Culicidae) in northern Mexico

    Get PDF
    Objective: To determine the response of the larvae of three Ae. aegypti populations from the Mexican North Pacific region to insecticides with different mode of action. Design/Methodology/Approach: Three colonies were obtained placing ovitramps in peridomestic sites in Guadalajara (Jalisco), Culiacan (Sinaloa), and La Paz (Baja California Sur). Based on the methodology proposed by WHO, the bioassays were carried out with F1 larvae in the early fourth instar. Results: The larvae from the three field colonies had high resistance to permethrin and low resistance to deltamethrin; however, they were susceptible to Spinosad and Bacillus thuringiensis var. Israelensis. The Culiacan strain showed a high resistance to the malathion and propoxur insecticides. Study Limitations/Implications: The results provided valuable information about the response of these populations to insecticides, which are useful to establish resistance in the lab. Consequently, further studies should be carried out to complement the information obtained in these field tests. Findings/Conclusions: The data indicated resistance levels to pyrethroid insecticides (mainly permethrin), as well as to organophosphates and carbamates

    Rhizobacteria inoculation and its effect on the productive parameters of sorghum

    Get PDF
    Objective: To evaluate the effect of the Bacillus megaterium and Pseudomonas japonica rhizobacteria on the productive parameters of sorghum. Design/Methodology/Approach: The experiment was carried out in Padilla, Tamaulipas, where the effect of inoculating a sorghum crop with the Bacillus megaterium KN13 and Pseudomonas japonica KC14 strains on its productive parameters was evaluated. Both strains were used in two concentrations (106 and 107 CFU). A randomized block design was applied, consisting of five treatments (two strains × two concentrations, plus a control), with six and nine replications. Results: The B. megaterium and P. japonica strains can fix nitrogen and produce siderophores. Inoculating these strains into the sorghum crop increases grain yield, plant height, panicle length, plant stem diameter, and aerial dry weight. Better results are recorded when the strains have a 107 CFU concentration. Study Limitations/Implications: Each type of soil and crop has various microbiomes. Findings/Conclusions: The use of an adequate concentration of rhizobacteria improves sorghum production; therefore, it is a sustainable alternative, both for the nutrition of the crop and the reduction of the use of synthetic fertilizers

    Corn kernel and corn fodder yield in four maize varieties in the humid tropics of Mexico

    Get PDF
    In southeastern Mexico, maize is planted for its corn kernel. Additionally, its bracts are used for tamales and handicrafts, its cobs are used as vegetables for human consumption, and its fodder is used to feed cattle. Objective: To evaluate the growth and yield of maize planted for corn kernel and fodder production in Loma Bonita, Oaxaca, Mexico. Design/Methodology/Approach: The DK7500, H-520, A7573, and VS-536 maize genotypes were used as treatments for the production of corn kernel and fodder, using a randomized blocks design with three replications. Several variables were measured: plant height, stem diameter, chlorophyll, leaf length, leaf width, and leaf area. Finally, the corn kernel and fodder yields were estimated (kg ha-1) at the time of harvest. Results: The genotypes under study showed significant differences (P£0.05) in plant height, stem diameter, leaf length, leaf width, and leaf area. The A7573 genotype recorded the highest corn kernel yield (20,409 kg ha-1), while fodder yield was statistically the same in the four genotypes. Study Limitations/Implications: An analysis of different environments in a multi-year period would help to verify the information obtained. Findings/Conclusions: A7573 maize had the highest corn kernel yield (20,409 kg ha-1): 15.5% higher than that of H-520 and 12.5% higher than VS-536 (control). Fodder yield was statistically similar between genotypes, ranging from 40,529 kg ha-1 (H-520) to 42,104 kg ha-1 (VS-536)

    Evaluation of protein sources in snail (Helix aspersa Müller) diets on the antioxidant bioactivity of peptides in meat and slime

    Get PDF
    Objective: This work evaluates the effect of a dietary supply of amaranth, oats and lentils as a protein source on anthropometric measurements, the chemical composition in meat, as well as antioxidant activity in meat peptides and secretion of the snail (Helix aspersa Múller). Design/methodology/approach: We worked with three groups of snails of 36 individuals and a control group fed with the same diet varying the protein source: amaranth, oats and lentils. A sample was taken every seven days and the shell's weight, width and length were measured. Five individuals from each group were sacrificed and the meat from which they were sacrificed was extracted: weight, moisture and protein. The hydrolysis soluble proteins in meat and slime were obtained and the antioxidant activity was measured using the reducing radicals DPPH• and ABTS•. Results: Snail meat was obtained with an increase of more than double in weight when 10% of Am was supplied as a protein source. Likewise, the dimensions of the shell will increase by 5%-11%. In FSM, it was obtained up to 79.8% moisture, 11.2% protein, 1.2% fat and 2.5% collagen. When obtaining snail meat flour, it was reduced to 12±1.9% humidity with up to 24.53 g/g of soluble protein. When hydrolyzing the proteins, it was observed that the peptides obtained presented the IC50 of DPPH scavenging activity of 21.58±2.7, 5.45± 1.8, 12.69±1.7 and IC50 of ABTS removal activity 8.86±0.9, 1.62±0.04, 10.84±1.0, for HFSM, HSMF and SS samples, respectively. Limitations on study/implications: It is necessary to carry out other studies on the functionality of snail meat proteins and thus propose their implementation in food formulations to maximize their commercialization. Findings/conclusions: Feeding snails with amaranth helps to increase the quality of protein in fresh meat and flour. Likewise, requests for soluble proteins from beef, flour and secretion are alternatives for preparing functional foods.Objective: This work evaluates the effect of a dietary supply of amaranth, oats and lentils as a protein source on anthropometric measurements, the chemical composition in meat, as well as antioxidant activity in meat peptides and secretion of the snail (Helix aspersa Múller). Design/methodology/approach: We worked with three groups of snails of 36 individuals and a control group fed with the same diet varying the protein source: amaranth, oats and lentils. A sample was taken every seven days and the shell's weight, width and length were measured. Five individuals from each group were sacrificed and the meat from which they were sacrificed was extracted: weight, moisture and protein. The hydrolysis soluble proteins in meat and slime were obtained and the antioxidant activity was measured using the reducing radicals DPPH• and ABTS•. Results: Snail meat was obtained with an increase of more than double in weight when 10% of Am was supplied as a protein source. Likewise, the dimensions of the shell will increase by 5%-11%. In FSM, it was obtained up to 79.8% moisture, 11.2% protein, 1.2% fat and 2.5% collagen. When obtaining snail meat flour, it was reduced to 12±1.9% humidity with up to 24.53 g/g of soluble protein. When hydrolyzing the proteins, it was observed that the peptides obtained presented the IC50 of DPPH scavenging activity of 21.58±2.7, 5.45± 1.8, 12.69±1.7 and IC50 of ABTS removal activity 8.86±0.9, 1.62±0.04, 10.84±1.0, for HFSM, HSMF and SS samples, respectively. Limitations on study/implications: It is necessary to carry out other studies on the functionality of snail meat proteins and thus propose their implementation in food formulations to maximize their commercialization. Findings/conclusions: Feeding snails with amaranth helps to increase the quality of protein in fresh meat and flour. Likewise, requests for soluble proteins from beef, flour and secretion are alternatives for preparing functional foods

    Harvest age of Urochloa hybrids regarding yield, chemical composition, and in vitro biogas production

    Get PDF
    Objective: To evaluate the chemical composition, fermentation, and in vitro biogas production of the Cayman and Cobra cultivars, at different cutting ages. Design/Methodology/Approach: Dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose (HEM), and cellulose (CEL) were determined at 28, 35, 42, and 49 cutting days. In vitro dry matter degradation (IVDMD), pH, and concentration of volatile fatty acids (VFA) were determined during fermentation. The biogas volume was estimated at 6, 12, 24, 48, and 72 hours; the volume of methane (CH4) and carbon dioxide (CO2) in the Cobra and Cayman forages was determined at 72 hours. A completely randomized design was used for the experiment. Results: There were no differences (P>0.05) in DM production during the different cutting ages. CP was higher (P<0.05) in both cultivars, at 28 and 35 days after the cutting. The NDF, ADF, HEM, and CEL percentages were different in both cultivars. IVDMD was higher (P<0.05) between day 28 and day 42. Finally, CH4 production was lower (P<0.05) at 28 and 35 days after the cutting. Study Limitations/Implications: The chemical composition of pastures is influenced by climate and, therefore, further analysis must be carried out during different periods or seasons of the year. Findings/Conclusions: The optimal cutting age of the Cobra and Cayman cultivars under drought conditions is between day 28 and day 35 of regrowth. During that period, they have the best chemical and fermentation characteristics

    Disinfestation of Agave angustifolia Haw. collected in the field prior to in vitro culture

    Get PDF
    Objective: to determine a disinfestation procedure for in vitro establishing of Agave angustifolia Haw. explants collected in the field. Design/ Methodology/ Approach: seven agave plants per treatment were placed in perlite to contrast six treatments; two agrochemicals (Benomyl 2 g L-1 and Actara 0.5 g L-1) and three contact times (10, 20 and 30 days). The stems of the plants were sectioned in 4 – 6 segments, after treatment with alcohol 80%, chlorine 30% and hydrogen peroxide 20%, to later place them in vitro. Usually there is contamination of explants mainly by bacteria, so Pursue® was used at 25 and 50%, placing 20 explants in each concentration for 1 minute. The variables evaluated were percentage of visibly healthy explants, type of contamination. Due to the difference in the number of explants, no statistical tests were performed. Results: the plants treated with Benomyl presented less contamination by fungi without considering the contact time. Bacteria were present in the different treatments used, however, in the explants with pretreated with Benomyl, 85% was obtained visibly healthy when Pursue® at 50% was used. Study limitations/ Implications: other agrochemicals, such as specific bactericides are desirable to determine through their use, whether they mitigate in vitro contamination by pathogenic bacteria. Findings/ Conclusions: pretreatments with agrochemicals for the in vitro establishing of plants collected from the field are necessary to increase the number of visually healthy explants. With the Pursue® product at 50%, up to 85% of explants can be obtained without the presence of fungi or bacteria

    Nutritional characteristics of different types of eggs

    Get PDF
    Objective: To analyze 5 types of poultry eggs (chicken, turkey, ostrich, duck and quail) to compare their nutritional characteristics and sensory properties. Design/ Methodology/ Approach: A physical analysis was performed: weight of the entire egg (weight and proportion of the albumin, yolk and shell) length and width of the entire egg, shape index, shell color, and yolk color, nutritional (determination of raw fat, protein, dry matter and ashes) and in sensory adaptation (measured through hedonic testing of adaptability through the arrangement of nine points to an individualized quantity of 97). Different types of egg used: chicken, turkey, ostrich, duck and quail. Results: The egg containing the most amount of protein was that of the duck (13.02 ± 0.46 %), while the sample containing the lowest result was that of the ostrich (9.47 ± 0.27 %). The type of egg that contained the fattest level was the duck (10.31 ± 0.75 %); on the other hand, the type of egg that demonstrated the least amount of fat was that of the chicken egg (8.28 ± 0.39 %). Results/ Findings/ Conclusion: Even though some physical differences exist in all types of eggs, they are similar and there is minimal variation in terms of their nutritional value. Therefore, these different types of eggs can be applied for consumption as substitutes for chicken eggs and as an alternative source of protein. Limitations of the study/ Implications: Lack of previous research in regard to comparisons of the types of analyzed eggs

    Social network of producers of dehydrated products with thermosolar technology in Zacatecas, Mexico

    Get PDF
    Objective: analyze the social networks and the trust that exists among the producers of dehydrated products with solar thermal technology in the agricultural strip of Zacatecas, in order to determine the organizational potential through prevailing levels of trust among the producers. Design/methodology/approach: a survey was applied to 30 dehydrated producers who have received training and information on the use of the solar thermal plant, all belonging to the state of Zacatecas. Indicators were used for the analysis of social networks. Results: the results confirmed the importance of direct and indirect links, of the total number of producers, eighteen of them had no relationship with any producer, however, the rest showed at least one interaction with another producer. The producers have notable characteristics and acceptable trust relationships. Limitations on study/implications: the results apply to the selected sample; the thermosolar food dehydration technology is still unknown among the producers. Findings/conclusions: trust relationships must be strengths and strategies must be created to disseminate knowledge in a timely and efficient manner with key stakeholders and strengthen their pre-existing interactions.Objective: To analyze the social networks and the trust there is among the producers of dehydrated productswith thermosolar technology in the agricultural strip of Zacatecas, in order to determine the organizationalpotential through prevailing levels of trust between producers.Design/methodology/approach: A survey was applied to 30 producers of dehydrated products who havereceived training and information about the use of the thermosolar plant, all belonging to the state of Zacatecas.Indicators were used for the social networks analysis.Results: The results confirmed the importance of direct and indirect links; of all the producers, eighteenhad no relationship with any other producer, although the rest showed at least one interaction with anotherproducer. The producers have notable characteristics and acceptable trust relationships.Limitations on study/implications: The results apply to the selected sample; thermosolar food dehydrationtechnology is still unknown among the producers.Findings/conclusions: Trust relationships must be strengthened and strategies should be created to disseminateknowledge in a timely and efficient manner with key stakeholders and thus boost their pre-existing interactions

    Design of an interpretive trail and conservation of native orchids (Orchidaceae) in an anthropized landscape

    Get PDF
    Objective: Design an interpretative trail of native orchids in the gardens of the Córdoba Campus of the Colegio de Postgraduados. Design/methodology/approach: The research is descriptive and field type. First, the feasibility of the trail was validated through an electronic survey; then several field trips were made, the script was created and, finally, the interpretive script of the trail was validated. Results: The orchid interpretive trail was considered feasible by 95% of those surveyed. The inventory of the trail area allowed us to verify that the orchids are accessible in all the seasons along the route. The design of the interpretive path has nine thematic stations: 1. Introduction, 2. Walk of the Catasetum, 3. Germination in vitro, 4. Acclimatization of orchids, 5. Miniature orchids, 6. Establishment of orchids in phorophytes, 7. The walk of the Laelias, 8. The walk of the flowers of May and 9. The ears of donkey. The interpretive path allows to know and appreciate the diversity of wild orchids, with 28 species and their phorophytes, in a 700 m walk, for 2.5 hours. Limitations on study/implications: It is a guided interpretive trail. Findings/conclusions: The interpretive trail allows you to appreciate the importance of the Orchidaceae family, one of the largest families in Mexico and the world, its environmental and ornamental importance.Objective: to design an interpretive trail of native orchids in the gardens of Campus Cordoba, Colegio de Postgraduados.Design/Methodology/Approach: this study is descriptive and field based. First, the feasibility of the trail wasvalidated through an online survey. Afterwards, several field trips were conducted; the script was created, andfinally the interpretive script of the trail was validated.Results: of the respondents, 95% considered the orchid interpretive trail as feasible. The inventory of thetrail area allowed to verify that the orchids are accessible at all stations along the route. The design of theinterpretive trail has nine thematic stations: 0. Introduction, 1. The Catasetum trail, 2. In vitro germination, 3.Acclimatization of orchids, 4. Miniature orchids, 5. Establishing orchids in phorophytes, 6. The Laelias trail,7. The “May Flowers” trail, and 8. The “Donkey ears” (Thricocentrum luridum). The interpretive trail allowsanyone to know and appreciate the diversity of wild orchids, 28 species and their phorophytes, along 700 m ofwalking trails for a 2.5-hours route.Limitations of the study/Implications: it is a guided interpretive trail.Findings/Conclusions: The interpretive trail allows us to appreciate the importance of the Orchidaceaefamily; which is one of the largest families in Mexico and the world through environmental and ornamentalimportance

    1,724

    full texts

    1,940

    metadata records
    Updated in last 30 days.
    Revista Agro Productividad is based in Mexico
    Access Repository Dashboard
    Do you manage Open Research Online? Become a CORE Member to access insider analytics, issue reports and manage access to outputs from your repository in the CORE Repository Dashboard! 👇