Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries

The objective of the present investigation was to identify the spatial variability of hydraulic properties of a volcanic ash soil under irrigated Blueberry crops, in order to improve the irrigation efficiency in a very sensitive crop by excess or lack of water. Undisturbed samples (230 cm³) were col...

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Autores principales:	Dec,D, Dörner,J
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2014
Materias:	Variability of soil physical properties efficient irrigation water storage capacity volcanic soils
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000300007
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spelling	oai:scielo:S0718-951620140003000072015-03-31Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberriesDec,DDörner,J Variability of soil physical properties efficient irrigation water storage capacity volcanic soils The objective of the present investigation was to identify the spatial variability of hydraulic properties of a volcanic ash soil under irrigated Blueberry crops, in order to improve the irrigation efficiency in a very sensitive crop by excess or lack of water. Undisturbed samples (230 cm³) were collected in area of 945 m² (grid: 72 points separated by 3.2 and 6.4 m) between 1 and 7 cm depth in an Acrudoxic Fulvudands to determine the bulk density (Bd), total porosity (TP), the volume of water-filled pore space (ea(6kPa)), plant available water (PAW), permanent wilting point (PWP) and saturated hydraulic conductivity (Ks). Along with sampling, volumetric water content (θ(Field)) was measured using a TDR (grid: 120 points spaced by 1.4 and 3.2 m). From all results contour maps were developed, using geostatistical tools. The coefficient of variation of (θ(Field)), Ks, (ea(6kPa)) and PAW showed a moderate variability (15 % - 35 %). The dependence degree (DD) was considered as weak for (θ(Field)), moderate for(6kPa) ), ea(6kPa), PAW and high for Bd, TP, Ks and (θ(0.1kPa). The properties with largest DD were soil structure-dependent, whereas, the lowest values were observed for those related to soil texture (in this case θ(Field), which were close to the PMP). The spatial variability was related to the high water storage capacity and the ability of the soil to conduct water with different intensities, what is related to the amount of water-filled macropores.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.14 n.3 20142014-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000300007en10.4067/S0718-95162014005000047
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Variability of soil physical properties efficient irrigation water storage capacity volcanic soils
spellingShingle	Variability of soil physical properties efficient irrigation water storage capacity volcanic soils Dec,D Dörner,J Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
description	The objective of the present investigation was to identify the spatial variability of hydraulic properties of a volcanic ash soil under irrigated Blueberry crops, in order to improve the irrigation efficiency in a very sensitive crop by excess or lack of water. Undisturbed samples (230 cm³) were collected in area of 945 m² (grid: 72 points separated by 3.2 and 6.4 m) between 1 and 7 cm depth in an Acrudoxic Fulvudands to determine the bulk density (Bd), total porosity (TP), the volume of water-filled pore space (ea(6kPa)), plant available water (PAW), permanent wilting point (PWP) and saturated hydraulic conductivity (Ks). Along with sampling, volumetric water content (θ(Field)) was measured using a TDR (grid: 120 points spaced by 1.4 and 3.2 m). From all results contour maps were developed, using geostatistical tools. The coefficient of variation of (θ(Field)), Ks, (ea(6kPa)) and PAW showed a moderate variability (15 % - 35 %). The dependence degree (DD) was considered as weak for (θ(Field)), moderate for(6kPa) ), ea(6kPa), PAW and high for Bd, TP, Ks and (θ(0.1kPa). The properties with largest DD were soil structure-dependent, whereas, the lowest values were observed for those related to soil texture (in this case θ(Field), which were close to the PMP). The spatial variability was related to the high water storage capacity and the ability of the soil to conduct water with different intensities, what is related to the amount of water-filled macropores.
author	Dec,D Dörner,J
author_facet	Dec,D Dörner,J
author_sort	Dec,D
title	Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
title_short	Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
title_full	Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
title_fullStr	Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
title_full_unstemmed	Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
title_sort	spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162014000300007
work_keys_str_mv	AT decd spatialvariabilityofthehydraulicpropertiesofadripirrigatedandisolunderblueberries AT dornerj spatialvariabilityofthehydraulicpropertiesofadripirrigatedandisolunderblueberries
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Spatial variability of the hydraulic properties of a drip irrigated andisol under blueberries

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