Direct field method for root biomass quantification in agroecosystems

Frasier, Ileana; Noellemeyer, Elke; Fernández, Romina; Quiroga, Alberto

doi:10.1016/j.mex.2016.08.002

Cited by 37 publications

(23 citation statements)

References 23 publications

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“…Roots were oven dried to a constant weight at 55 ° C for 24 h to determine dry biomass. Total root biomass was calculated by estimating the influence percentage of the core hole described by Frasier, Noellemeyer, Fernández, and Quiroga ().

I_{C R} (%) = D (2 / b) 100

where, I CR is the influence percentage for the crop‐row core sample, D is the core diameter, and b is the distance between crop rows.…”

Section: Methodsmentioning

confidence: 99%

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Row spacing of alfalfa interseeded into native grass pasture influences soil‐plant‐water relations

et al. 2020

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Interseeding alfalfa (Medicago sativa L.) can improve forage quality of grasslands by adding a high‐protein species, but this runs the risk of accelerating soil water depletion. The objective was to evaluate effects of cultivar and row spacing of alfalfa on soil water balance and plant water potentials (Ψ) of two upright‐type cultivars, NuMex Bill Melton and WL 440HQ, and a prostrate‐type Falcata‐Rhizoma blend, interseeded into native grasses in October 2015 near Lubbock, Texas. Alfalfa was interseeded at 36‐cm (narrow) and 71‐cm (wide) row spacings. Soil volumetric water content (VWC) and midday Ψstem and Ψleaf were measured weekly in 2017 and 2018 growing seasons. Soil VWC was not affected by alfalfa cultivars (P > .05), whereas alfalfa row spacings differed (P < .05). Narrow spacing caused lower (P < .05) VWC than wide spacing relative to the grass‐only control in both the upper 40‐ and 40‐ to 100‐cm layers of the soil. Wide‐row spacing had similar VWC to control in 2017 for both soil layers (P > .05). Soil water depletion increased with alfalfa crown density (r = .60, P < .05) in association with enhanced evapotranspiration and denser root mass below 30‐cm soil depth. Grass and alfalfa Ψstem and Ψleaf were depressed in narrow rows relative to wide rows and control, indicating that presence of alfalfa intensified competition with the grass for soil water. The wide‐row treatment seldom had adverse effects on grass water stress. Wide‐row spacing achieved a favorable compromise between enhanced water use and improved stand productivity.

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I_{C R} (%) = D (2 / b) 100

where, I CR is the influence percentage for the crop‐row core sample, D is the core diameter, and b is the distance between crop rows.…”

Section: Methodsmentioning

confidence: 99%

“…Roots were oven dried to a constant weight at 55 • C for 24 h to determine dry biomass. Total root biomass was calculated by estimating the influence percentage of the core hole described by Frasier, Noellemeyer, Fernández, and Quiroga (2016).…”

Section: Root Weight Densitymentioning

confidence: 99%

Row spacing of alfalfa interseeded into native grass pasture influences soil‐plant‐water relations

et al. 2020

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“…Roots from each layer of soil were collected, dried and massed from each layer. Switchgrass root biomass was estimated as described elsewhere (Frasier et al, 2016). For fallow plots, four randomly assigned 1 m 2 subplots within each of the quadrants were selected to take four 0-1 m soil cores to represent root biomass across the plot (Fig.…”

Section: Methodsmentioning

confidence: 99%

Conversion of marginal land into switchgrass conditionally accrues soil carbon and reduces methane consumption

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Kuang

et al. 2020

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“…1 b, c). Crumbling and drift of soil can be more frequent in poorly structured or sandy soils [10] . It should be noted that most of soil sampling methods implies soil modification (e.g.…”

Section: Methodsmentioning

confidence: 99%

A method for soil moisture probes calibration and validation of satellite estimates

et al. 2017

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Direct field method for root biomass quantification in agroecosystems

Abstract: Graphical abstract

Cited by 37 publications

References 23 publications

Row spacing of alfalfa interseeded into native grass pasture influences soil‐plant‐water relations

Row spacing of alfalfa interseeded into native grass pasture influences soil‐plant‐water relations

Conversion of marginal land into switchgrass conditionally accrues soil carbon and reduces methane consumption

A method for soil moisture probes calibration and validation of satellite estimates

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