Cuantificación de carbono en cacao tipo nacional en el Progreso provincia de El Oro Ecuador

One of the strategies for the mitigation of climate change is the capture of soil organic carbon (SOC), mainly in land-use systems in forestry and agroforestry system. The general research aimed to quantify the carbon capture in a soil cultivated with Theobroma cacao L. National type 0-10, 10-20 and 20-40 centimeters of depth to a soil in fallow (no agricultural activity for 50 years). For this established two one-hectare plots by land use, where the two transepts for each land use of 30 by 10 m in width and a separation of 15 m between sampling point. To estimate the amount of C determinations were done by the method of the cylinder, texture by BOUYOUCOS to establish the proportions of sand, silt, and clay; supplementary analysis was also conducted to verify aspects of fertility as EC was determined with the conductivity meter, pH was determined peachimetro; as well as the color of the soil with the table Munsell. The Da expressed the lowest CV (%) in the three layers for both uses of the soil; being the biggest difference between the variables granulometric Clay, with values in cocoa between 13 to 16.67% and fallow lands of 30 to 32.67 %. The frequency of the textural classes, in the case of cocoa a predominance of sandy loam soil with 83.33% value ≥relative frequency, in the three strata. In fallow textural distribution was Frank clayey and sandy soil with a ≥ 66.67% in the first and second tier and Clay Loam soil in the last stratum. The pH in cocoa was 6.75 in the first layer to 6.73 in the third stratum showing and little variability in fallow with values between 4.83 and 4.77. The EC showed in the stratum 20_40 The lowest value (0.16 dS/m), with little variability among the rest of strata by land use. The variables CO and MO in fallow presented the greatest variability with values that descends in the strata the Pearson correlation showed high r (≥0.6 negative type) between the variables pH with clay (-0,790**) and sand (-0,610**), CE and Da (-0,683**) and clay with sand (-0,927**). With what shows the antagonism between the granulometric properties and the soil reaction (pH). The spatial distribution of the data between Da and CO by strata expressed a value of 1 is greater ≥and ≤1.5 in both cocoa and fallow, the percentage of CO was <1%. The comparison was obtained from half of the biomass determined by transept, showed no statistical difference, but the analysis of variance for storage of C per sampling point was significant, the comparison of half of the total number of C which gives a hectare of National Cocoa showed significance in the last sampling points. By way of conclusion the concentration of carbon dioxide was much in cocoa which decreased as they deepened the sampling without reaching these values to those obtained in agroforestry systems taken as reference in soils and climatic conditions similar to the study

• Main Author: Sanmartin Moreno, Washington Stalin (author)
• Format: bachelorThesis
• Published: 2017
• Subjects: CARBONO; COMPARACIÓN; PROFUNDIDAD; TEXTURA
• Online Access: http://repositorio.utmachala.edu.ec/handle/48000/11706