Estudio del bulbo húmedo en el riego por surcos en la quinta experimental La Argelia.
The filtration into the furrow irrigation is basically a two-dimensional process that depends on the characteristics of the groove and the diffusivity of the soil. The point of wetting is set according to the relative importance of matrix and gravitational forces. In the case of ground forces domina...
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| Format: | bachelorThesis |
| Idioma: | spa |
| Publicat: |
2013
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| Matèries: | |
| Accés en línia: | http://dspace.unl.edu.ec/jspui/handle/123456789/11430 |
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Afegir etiqueta | Sumari: | The filtration into the furrow irrigation is basically a two-dimensional process that depends on the characteristics of the groove and the diffusivity of the soil. The point of wetting is set according to the relative importance of matrix and gravitational forces. In the case of ground forces dominate matrix study since wetted zone section tends to the circular shape, which is of interest to the relatively deep furrow irrigation, because the wetting of the grooves requires significant upward wet. The purpose of the research was to study the relationship between the depth and wetted cross section; objectively intended to contribute to the proper management of water and soil in the practice of agricultural irrigation furrow method on Quinta Experimental "La Argelia", by definition of the wet bulb three irrigation depths with two drafts. The resulting data having proceeded to construct the function relating the depth to the width of wetting. The mathematical model that relates the depth wet bulb has a shape generally corresponding to a second order polynomial equation represented as follows: y = ax2 + bx + c, the estimated data modeled with 99.9 % accuracy, considered very acceptable for estimating the distance between rows. The wetting front in this case is formed because the rate of infiltration into the barrier is lower than the top layer, that is to say, in the humid bulb over time showing the effect of stratification on the horizontal movement of water. Knowing this soil characteristic can estimate the overlap to achieve a wet area capable of wetting the rooting depth of crops grown in the Quinta Experimental "La Argelia" depending on each. The importance of these relationships, lies in that can give an estimate fairly reliable of the water volume necessary to moisten until the depth effective root the crop, in each of its different stages of growth, what will significantly decrease the losses deep percolation. To study the ground, the diameter of wetting tends to stabilize in Treatment 1 to 152 cm, in Treatment 2 in 175 cm, in Treating 3 in 199 cm, Treatment 4 in 145 cm, Treatment 5 in 170 cm and Treatment 6 in 192 cm, which means that in case of horticultural crops and planting short cycle, maximum spacing between rows that can guarantee a continuous strip of moisture and overlap between bulbs is 10 %. In reviewing the bulbs obtained, we can see that there is no influence draft which is confirmed by the statistical analysis, since the difference between means are for T1 vs. T4 of 1.45 cm, T2 vs. T5 of 1.54 cm and T3 vs. T6 of 4 cm which indicates non-significance between treatments of the same volume but different depth considered statistically equal. That is, for a given volume of water applied to the soil, the difference in depth did not influence the width of wetting, as well, from a depth of 5 centimeters to one 10 inches, the wetted perimeter does not grow significantly. To understand otherwise, the wetted perimeter is the gateway to water wetting of the soil mass, and there is little difference between these perimeters wet, this does not influence the width of wetting. |
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