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Articles by Hortensia Brito-Vega
Total Records ( 3 ) for Hortensia Brito-Vega
  Hortensia Brito-Vega , Jose Manuel Salaya-Dominguez , Edmundo Gomez-Mendez , Armando Gomez-Vazquez and Jesus Bernardo Antele-Gomez
  Objective: This study aimed to characterise the physico-chemical properties of soils and the biochemistry of cocoa pods in cocoa agroforestry systems, that may be beneficial for community of cocoa associations under agroforestry systems in the tropical, Tabasco, Mexico. Methodology: Granulometric, biochemical and physical analysis showed that the cocoa agroforestry plantations of the municipal districts of Cunduacán, Cardenas Comalcalco have clayey soils, pH was moderately acidic to neutral and it had high levels of organic matter and total nitrogen content: 9-10 and 0.15-0.21%, respectively. Data were analyzed by linear model and one-way (ANOVA) using SAS. Results: The average nutritional content of cocoa pods from cocoa agroforestry systems was as follows, total carbon (94.34%), Zn (50.26%), nitrogen (1.33%), potassium (1.78%), calcium (0.42%), magnesium (0.32%), ash (93.20%) and protein (8.3%). The electrical conductivity was influenced by various physico-chemical properties of the soil, such as soil texture, organic matter content, soil moisture, cation exchange capacity, salinity, pH, Ca and Mg. The physico-chemical properties and high nutritional content of the soils used in these agroforestry systems were suitable for the sustainable production of cocoa. Conclusion: It was concluded that results may vary depending on the natural balance between the vegetation habitat and the biochemical, biological, physical and chemical properties of the soil.
  Hortensia Brito-Vega , David Espinosa-Victoria , Carlos Fragoso , Daniel Mendoza , Nancy De la Cruz Landero and Angel Alderete-Chavez
  The objective of the present research was to study the particle of organic matter and the presence of earthworm under conservation and traditional tillage during winter and spring seasons. The sampling site was experimental field of FIRA in Villadiego, Guanajuato. The soil and earthworm sampling was carried out in monoliths of 25x25x30 cm (sidexsidexdepth), dividing the depth into strata: 0-10, 10-20 and 20-30 cm. An earthworm species was identified namely Phoenicodrilus taste under conservation and conventional tillage. P. taste showed a population of 328 individuals m-2 during the spring season under conservation tillage. This data coincided with the particle of soil organic matter in the 2 μm category, high organic carbon content (5, 3 y 2%), total nitrogen (0.3, 0.2 y 0.1%) and the depths of 0-10, 10-20 and 20-30 cm, respectively.
  Hortensia Brito-Vega and David Espinosa-Victoria
  Anecic, epigeous and endogeous earthworms stimulate or inhibit the growth of bacteria of agricultural importance inside their digestive tracts. It is possible that these bacteria establish a mutual symbiosis within the digestive tract of the earthworm. The bacterial species reported within the intestines of the earthworms belong to the genuses Bacillus, Aeromonas, Pseudomonas, Flavobacterium, Nocardia, Gordonia, Vibrio, Clostridium, Proteus, Serratia, Mycobacterium, Klebsiella, Azotobacte and Enterobacter. These bacteria inhabit the soil and develop considerably when there are easily degradable organic soil nutrients. The bacterial community inside the digestive tract of earthworms pertains to at least four physiological groups: plant growth promoters, free-living nitrogen fixers, biocides and phosphate solubilizers. The diversity of bacterial communities within the digestive tracts of earthworms depends on climate, soil type and organic matter. The objective of this present study was to analyze the state of art on the bacterial diversity within the digestive tracts of earthworms.
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