Efecto de la corrección de la acidez del suelo, y la aplicación de herbicidas en la erradicación de la llashipa “pteridium arachnoideum (Kaulf.) Maxon
This research evaluated the effect of liming in the correction of the acidity of the soil and the use of herbicides in the eradication of the llashipa “Pteridium arachnoideum (Kaulf.) Maxon”, for which an previous analysis of soil was realized giving like proved a pH of 4,27 (extremely acidic) and i...
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| Formato: | bachelorThesis |
| Lenguaje: | spa |
| Publicado: |
2015
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| Materias: | |
| Acceso en línea: | http://dspace.unl.edu.ec/jspui/handle/123456789/10090 |
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Agregar Etiqueta | Sumario: | This research evaluated the effect of liming in the correction of the acidity of the soil and the use of herbicides in the eradication of the llashipa “Pteridium arachnoideum (Kaulf.) Maxon”, for which an previous analysis of soil was realized giving like proved a pH of 4,27 (extremely acidic) and interchangeable acidity 1,9 meq of Al3+ (Toxic), it was observed that area should present a grade of infestation of the weed > 30 %, therefore he was calculating the dose of agricultural lime apply (4.5 , 3 and 1.5 t ha-1), the application of the commercial dose of the agrochemicals Mapkill and the mixture of the same with Pastar, a design was used in a randomized complete block with three replications, monitoring the liming effect during the period of barreling of agricultural lime and the effectiveness of the liming and the agrochemicals in the eradication of the weed, taking as a variable of introduction the technical craft (witness or Macheteado) in all the plots. In the application of agricultural lime the dose of 4.5 t ha-1 obtained better response increased the initial pH of 4.27 to 5.91, correcting the exchangeable acidity of 1.9 meq of At3 to zero, suitable for the majority of the crops, providing optimal quantities of nutrients such as Ca and decreasing the toxicity of faith that was present in toxic conditions in the plots. In regard to the herbicides the mixture of Mapkill and Pastar reduced the infestation of the weeds below the permitted threshold (> 25 %) equal turned out the dose of 4.5 t ha-1. The largest single source of income and net profit more high (calculated by loss of biomass grass) was obtained with a dose of 4.5 t ha-1. The treatment of 1.5 t ha-1, was the one that generated the greatest cost benefit ratio and redistribution to net capital invested of 4.29 units of investment. The treatment with a dose of liming of 4.5 t ha-1 and mixture of herbicide (Pastar and Mapkill) are the only ones who best is adapted to the insertion of a technique of rotational grazing for deployment within the agricultural sector. |
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