Estimating hydraulic conductivity of a sandy soil under different plant covers using minidisk infiltrometer and a dye tracer experiment

Homolák, Marián; Capuliak, Jozef; Pichler, Viliam; Lichner, Ľubomír

doi:10.2478/s11756-009-0088-5

Cited by 26 publications

(15 citation statements)

References 14 publications

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“…Predicted total seasonal water input and output, the ratio of actual to potential ET (agro-hydropotential index AHP) and maximum leaf area index (LAI) for the hybrids. microclimate must have been much dryer than inside the closed stand of the hybrids, which resulted in much lower soil water conductivity thus reduced infiltration (Homolák et al 2009). Stomatal resistance may increase as a consequence of the dryer microclimate (Anda 2008) reducing TR.…”

Section: Resultsmentioning

confidence: 99%

Root and leaf traits, water use and drought tolerance of maize genotypes

Végh

2013

Biologia

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Abstract:The main components of drought tolerance of six maize genotypes were studied to evaluate crop performance in water limiting environments: (1) the postponement of dehydration by reduced transpiration rate (TR) and an increased efficiency of water acquisition from soil; (2) the tolerance of dehydration by effective physiological water use. The aim was to describe the genotype dependent response to drought in leaf and root traits and water relations using data from controlled environment and field experiments, and using dynamic simulation by the Swedish Coup model. High genetic variation was detected in the root density, acquisition efficiency and water use among the genotypes. The female parent lines had the greatest TR with the smallest dry matter accumulation in water deficiency, whereas hybrids could acquire more water from dryer soil while maintaining a lower TR. Hybrid Mv 444 increased water potential more strongly in leaves than hybrid Norma. The postponement of dehydration was observed for Norma, while more tolerance to dehydration characterized Mv 444. Simulation was an effective tool for testing hypotheses considering water acquisition efficiency and for summarizing the results of the measurements in a formalized structure; it helped to quantify the dynamics of water availability and the impact of drought on the growth of the maize genotypes.

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Section: Resultsmentioning

confidence: 99%

Root and leaf traits, water use and drought tolerance of maize genotypes

Végh

2013

Biologia

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“…The tracer experiment at the forest site was carried out at the 100 cm × 100 cm plot and it is described in Homolák et al (2009). The tracer experiment in pure sand was carried out at the 50 cm × 100 cm plot and it is described in Lichner et al (2011).…”

Section: Methodsmentioning

confidence: 99%

Pines influence hydrophysical parameters and water flow in a sandy soil

et al. 2013

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Pines, used for sand dune stabilization, can influence the hydrophysical parameters and water flow in an aeolian sandy soil considerably, mainly due to soil water repellency. Two sites, separated by distance of about 20 m, formed the basis of our study. A control soil ("Pure sand") with limited impact of vegetation or organic matter was formed at 50 cm depth beneath a forest glade area. This was compared to a "Forest soil" in a 30-year old Scots pine (Pinus sylvestris) forest. Most of the hydrophysical parameters were substantially different between the two soil surfaces. The forest soil was substantially more water repellent and had two-times the degree of preferential flow compared to pure sand. Water and ethanol sorptivities, hydraulic conductivity, and saturated hydraulic conductivity were 1%, 84%, 2% and 26% those of the pure sand, respectively. The change in soil hydrophysical parameters due to soil water repellency resulted in preferential flow in the forest soil, emerging during a simulated heavy rain following a long hot, dry period. The wetting front established in pure sand exhibited a form typical of that for stable flow. Such a shape of the wetting front can be expected in the forest soil in spring, when soil water repellency is alleviated substantially.

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“…2012). Availability of soil water to plants is a significant factor affecting transpi-ration process, because water supply may be reduced and problematic under the conditions of climate drying transpiration (Homolák et al 2009;Hríbik et al 2012;Lichner et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Differences in transpiration of Norway spruce drought stressed trees and trees well supplied with water

et al. 2013

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The paper focuses on the evaluation of transpiration as a physiological process, which is very sensitive to drought stress. Reactions of 25-year-old Norway spruce (Picea abies (L.) Karst.) trees to drought were examined during 2009 summer. Sap flow rate (SF), meteorological and soil characteristics were measured continually. Vapour pressure deficit of the air (VPD) and cumulative transpiration deficit (KTD) was calculated. During the second half of the vegetation period, the decrease in soil water content was observed and irrigation was applied to a group of spruce trees, while the second group was treated under natural soil drought. On the days, when the differences in transpiration between irrigated (IR) and non-irrigated (NIR) trees were significant (21 days), transpiration of NIR trees was only 23% of the transpiration of IR trees. We found significant differences in transpiration when the soil water content (SWC) of NIR variant at a depth of 5-15 cm ranged from 10.4 to 13.7%. Under both regimes of water availability, daily transpiration significantly responded to atmospheric conditions. However, the influence of all assessed meteorological parameters on SF of NIR trees was significantly lower than on IR tree. The dependency of transpiration on evaporative demands of atmosphere decreased with the decreasing soil moisture. Cumulative transpiration deficit of the stand during the entire evaluated period was 50.9 mm. The difference between the transpiration of the mean NIR tree and of the mean IR tree was 278.8 L over the assessed period of 47 days (5.9 L per day). The transpiration of NIR trees was 40.3% from the transpiration of IR trees during this period.

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Estimating hydraulic conductivity of a sandy soil under different plant covers using minidisk infiltrometer and a dye tracer experiment

Cited by 26 publications

References 14 publications

Root and leaf traits, water use and drought tolerance of maize genotypes

Root and leaf traits, water use and drought tolerance of maize genotypes

Pines influence hydrophysical parameters and water flow in a sandy soil

Differences in transpiration of Norway spruce drought stressed trees and trees well supplied with water

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