Spatial and Temporal Distribution of Soil Water in the Tilled Layer Under a Corn Crop

Wesenbeeck, I. J. van; Kachanoski, R. G.

doi:10.2136/sssaj1988.03615995005200020011x

Cited by 90 publications

(43 citation statements)

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“…This was probably due to the activity of maize roots that were mostly concentrated below the stem, leading to site-specific evapotranspiration rates and consequently decreasing the soil water content. Extensive literature has already reported that root water uptake within the maize rows is spatially variable, both laterally and vertically [6,7], and can be influenced by incident rainfall [23]. As a result, the soil moisture differences observed between stemflow and throughfall in a silty-loam soil were rapidly smoothed by root activity.…”

Section: Discussionmentioning

confidence: 99%

“…This results in microscale variability in infiltration, distribution and root water uptake [6]. Van Weesenbeck and Kachanoski [7] studied the soil moisture dynamics in maize, observing that in-row soil water infiltration was greater than in the inter-row, as a consequence of stemflow interception. These results were confirmed by Hupet and Vanclooster [6], who measured a wide variability of rainfall beneath the maize canopy, ranging from 78% to 189%, with some areas receiving up to 4.5-times more water than incident rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Incident Rainfall Redistribution by Maize Canopy on Soil Moisture at the Crop Row Scale

Martello

Ferro

Bortolini

et al. 2015

Water

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Abstract:The optimization of irrigation use in agriculture is a key challenge to increase farm profitability and reduce its ecological footprint. To this context, an understanding of more efficient irrigation systems includes the assessment of water redistribution at the microscale. This study aimed to investigate rainfall interception by maize canopy and to model the soil water dynamics at row scale as a result of rain and sprinkler irrigation with HYDRUS 2D/3D. On average, 78% of rainfall below the maize canopy was intercepted by the leaves and transferred along the stem (stemflow), while only 22% reached the ground directly (throughfall). In addition, redistribution of the water with respect to the amount (both rain and irrigation) showed that the stemflow/throughfall ratio decreased logarithmically at increasing values of incident rainfall, suggesting the plant capacity to confine the water close to the roots and diminish water stress conditions. This was also underlined by higher soil moisture values observed in the row than in the inter-row at decreasing rainfall events. Modelled data highlighted different behavior in terms of soil water dynamics between simulated irrigation water distributions, although they did not show significant changes in terms of crop water use efficiency. These results were most likely affected by the soil type (silty-loam) where the experiment was conducted, as it had unfavorable physical conditions for the rapid vertical water movement that would have increased infiltration and drainage. OPEN ACCESSWater 2015, 7 2255

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Incident Rainfall Redistribution by Maize Canopy on Soil Moisture at the Crop Row Scale

Martello

Ferro

Bortolini

et al. 2015

Water

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“…However, few studies have focused on the spatial variation in soil respiration at micro-scales, e.g., between and within crop rows. Previous work has shown that soil temperature, soil water content, and root biomass distribute non-uniformly between crop rows [18][19][20], which may affect the spatial and temporal distribution of soil respiration, and consequently CO 2 efflux at the…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Variability of Soil Respiration between Soybean Crop Rows as Measured Continuously over a Growing Season

Wang

Ren

2017

Sustainability

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An improved understanding of temporal and spatial variations in soil respiration is essential for measuring soil CO 2 effluxes accurately. In this study, a field experiment was conducted to investigate the spatial and temporal variability of soil respiration between adjacent crop rows in a soybean (Glycine max L.) field. Soil CO 2 concentration, water content, and temperature at a 7.5 cm depth were recorded continuously at 0 cm, 12 cm, 24 cm, and 35 cm from the plant row during the growing season. Root biomass at the corresponding locations was collected from the 0 to 10 cm and 10 to 20 cm soil layers at three growth stages. Seasonal CO 2 efflux data showed that the minimum value appeared at the seeding stage, increased gradually, reached the maximum at the flowering and grain-filling stages, and then dropped steadily at the mature stage. Within a growth stage, CO 2 effluxes related positively to soil temperature, but negatively to soil water content. In the early and vigorous growing stages of soybean crop, soil respiration showed apparent diurnal variations, and was most significant at the crop row location. Except for the seeding stage, CO 2 effluxes at the crop row were larger than that of other locations, and effluxes at 35 cm from the row were representative of the mean CO 2 efflux between adjacent rows. We concluded that the spatial heterogeneity of CO 2 efflux between crop rows should be taken into consideration when measuring soil respiration in agricultural ecosystems.

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“…Vachaud, Silans, Balabanis, and Vauclin (1985) were the first to observe that, despite the spatiotemporal variability, some soil moisture spatial patterns are evident and that these patterns showed little variation over time. From these observations, the authors proposed the concept of temporal stability, which is the constant association between the spatial location and statistical measures that characterize a particular soil property over time (Van Wesenbeeck & Kachanoski, 1988).…”

Section: Introductionmentioning

confidence: 99%

<b>Temporal stability of soil moisture under effect of three spacings in a eucalyptus stand

et al. 2017

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Spatial and Temporal Distribution of Soil Water in the Tilled Layer Under a Corn Crop

Cited by 90 publications

References 0 publications

Effect of Incident Rainfall Redistribution by Maize Canopy on Soil Moisture at the Crop Row Scale

Effect of Incident Rainfall Redistribution by Maize Canopy on Soil Moisture at the Crop Row Scale

Spatial and Temporal Variability of Soil Respiration between Soybean Crop Rows as Measured Continuously over a Growing Season

<b>Temporal stability of soil moisture under effect of three spacings in a eucalyptus stand

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