A comparative study of young ‘Thompson Seedless’ grapevines under drip and furrow irrigation. I. Root and soil water distributions

Araujo, Francisco; Williams, Larry E.; Grimes, D. W.; Matthews, Mark A.

doi:10.1016/0304-4238(94)00710-w

Cited by 51 publications

(20 citation statements)

References 17 publications

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“…Our soil trench method with root image analysis also showed results consistent with different root quantification methods such as in situ root mapping (Araujo et al, 1995), wet sieving roots out of soil cores (Hodgson et al, 1990), or installing minirhizotrons in the root zone (Machado et al, 2003). These root architectural and morphological traits provide evidence that roots have a high potential for coordinated morphological adaptation to resource heterogeneity under different irrigation strategies.…”

Section: Discussionsupporting

confidence: 71%

Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System

Schmidt

LaHue

et al. 2020

Front. Plant Sci.

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Root exploitation of soil heterogeneity and microbially mediated rhizosphere nutrient transformations play critical roles in plant resource uptake. However, how these processes change under water-saving irrigation technologies remains unclear, especially for organic systems where crops rely on soil ecological processes for plant nutrition and productivity. We conducted a field experiment and examined how water-saving subsurface drip irrigation (SDI) and concentrated organic fertilizer application altered root traits and rhizosphere processes compared to traditional furrow irrigation (FI) in an organic tomato system. We measured root distribution and morphology, the activities of C-, N-, and P-cycling enzymes in the rhizosphere, the abundance of rhizosphere microbial N-cycling genes, and root mycorrhizal colonization rate under two irrigation strategies. Tomato plants produced shorter and finer root systems with higher densities of roots around the drip line, lower activities of soil C-degrading enzymes, and shifts in the abundance of microbial N-cycling genes and mycorrhizal colonization rates in the rhizosphere of SDI plants compared to FI. SDI led to 66.4% higher irrigation water productivity than FI, but it also led to excessive vegetative growth and 28.3% lower tomato yield than FI. Our results suggest that roots and root-microbe interactions have a high potential for coordinated adaptation to water and nutrient spatial patterns to facilitate resource uptake under SDI. However, mismatches between plant needs and resource availability remain, highlighting the importance of assessing temporal dynamics of root-soil-microbe interactions to maximize their resource-mining potential for innovative irrigation systems.

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Section: Discussionsupporting

confidence: 71%

Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System

Schmidt

LaHue

et al. 2020

Front. Plant Sci.

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“…In general, the lowest average Ψ stem values were encountered near the end of the water treatment period in the (deficit) irrigated orchard, as a result of the prolonged period of water deficiency. The extended use of drip irrigation caused small root systems [30,31], which were more sensitive to longer periods of lack of water, causing lower Ψ stem values in the deficit irrigation treatment. In 2012, however, during the later stages of the experimental water treatment (DOY 180-220), ETo dropped to 2 mm/day for an extended period.…”

Section: Water Statusmentioning

confidence: 99%

Stem Water Potential Monitoring in Pear Orchards through WorldView-2 Multispectral Imagery

et al. 2013

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Abstract:Remote sensing can provide good alternatives for traditional in situ water status measurements in orchard crops, such as stem water potential (Ψ stem ). However, the heterogeneity of these cropping systems causes significant differences with regards to remote sensing products within one orchard and between orchards. In this study, robust spectral indicators of Ψ stem were sought after, independent of sensor viewing geometry, orchard architecture and management. To this end, Ψ stem was monitored throughout three consecutive growing seasons in (deficit) irrigated and rainfed pear orchards and related to spectral observations of leaves, canopies and WorldView-2 imagery. On a leaf and canopy level, high correlations were observed between the shortwave infrared reflectance and in situ measured Ψ stem . Additionally, for canopy measurements, visible and near-infrared wavelengths (R 530 /R 600 , R 530 /R 700 and R 720 /R 800 ) showed significant correlations. Therefore, the Red-edge Normalized Difference Vegetation Index (ReNDVI) was applied on fully sunlit satellite imagery and found strongly related with Ψ stem (R 2 = 0.47; RMSE = 0.36 MPa),undoubtedly showing the potential of WorldView-2 to monitor water stress in pear orchards. The relationship between ReNDVI and Ψ stem was independent of management, irrigation setup, phenology and environmental conditions. In addition, results showed that this relation was also independent of off-nadir viewing angle and almost independent of viewing geometry, as the correlation decreased after the inclusion of fully shaded scenes. OPEN ACCESSRemote Sens. 2013, 5 6648With further research focusing on issues related to viewing geometry and shadows, high spatial water status monitoring with space borne remote sensing is achievable.

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“…The equation used to determine the fully irrigated baseline, taken from Williams and Baeza (2007) (Araujo et al 1995).…”

Section: Methodsmentioning

confidence: 99%

Midday measurements of leaf water potential and stomatal conductance are highly correlated with daily water use of Thompson Seedless grapevines

2011

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A study was conducted to determine the relationship between midday measurements of vine water status and daily water use of grapevines measured with a weighing lysimeter. Water applications to the vines were terminated on August 24th for 9 days and again on September 14th for 22 days. Daily water use of the vines in the lysimeter (ET LYS ) was approximately 40 L vine -1 (5.3 mm) prior to turning the pump off, and it decreased to 22.3 L vine -1 by September 2nd. Pre-dawn leaf water potential (W PD ) and midday W l on August 24th were -0.075 and -0.76 MPa, respectively, with midday W l decreasing to -1.28 MPa on September 2nd. Leaf g s decreased from *500 to *200 mmol m -2 s -1 during the two dry-down periods. Midday measurements of g s and W l were significantly correlated with one another (r = 0.96) and both with ET LYS / ET o (r = *0.9). The decreases in W l , g s , and ET LYS /ET o in this study were also a linear function of the decrease in volumetric soil water content. The results indicate that even modest water stress can greatly reduce grapevine water use and that short-term measures of vine water status taken at midday are a reflection of daily grapevine water use.

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A comparative study of young ‘Thompson Seedless’ grapevines under drip and furrow irrigation. I. Root and soil water distributions

Cited by 51 publications

References 17 publications

Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System

Impact of Irrigation Strategies on Tomato Root Distribution and Rhizosphere Processes in an Organic System

Stem Water Potential Monitoring in Pear Orchards through WorldView-2 Multispectral Imagery

Midday measurements of leaf water potential and stomatal conductance are highly correlated with daily water use of Thompson Seedless grapevines

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