Water Use Efficiency by Switchgrass Compared to a Native Grass or a Native Grass Alfalfa Mixture

Hendrickson, John; Schmer, Marty R.; Sanderson, Matt A.

doi:10.1007/s12155-012-9290-3

Cited by 23 publications

(19 citation statements)

References 40 publications

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“…Á. Löve] pasture was reported by Hendrickson et al. (2013) in North Dakota, where rainfall was normal during May–June and 50% of normal during July–August. One of the reasons that an alfalfa–grass mixture showed higher WUE over grass‐only stands was that alfalfa can grow over a longer season than grasses, especially in the latter part of the growing season (Sleugh et al., 2000).…”

Section: Resultsmentioning

confidence: 87%

“…Hendrickson, Schmer, and Sanderson (2013) suggested that an improvement in transpiration use efficiency can increase the WUE of crops either by enhancing biomass production or by reducing water consumption. Modern cultivars are believed to have higher transpiration use efficiency than traditional cultivars through a series of genetic improvements (Turner, 1993).…”

Section: Resultsmentioning

confidence: 99%

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Interseeding alfalfa into native grassland for enhanced yield and water use efficiency

et al. 2020

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Livestock productivity of semiarid, native grassland is potentially enhanced by interseeding alfalfa (Medicago sativa L.), but little is known of the impact on forage and N yield and water use. Two hay-type cultivars, 'WL 440HQ' (WL), 'NuMex Bill Melton' (NuMex), and grazing-type 'Falcata'-'Rhizoma' blend (FR) were interseeded into mixtures of four native-grass species in fall of 2015, at 36-and 71-cm row spacing as high-and low-density plantings, respectively. Plots were harvested periodically over 3 yr. Evapotranspiration (ET) was estimated based on rainfall and changes in soil water volume and used to calculate water use efficiency (WUE, kg of forage mass m −3 of ET). Alfalfa-grass mixtures produced 35% more forage mass and 96% greater N yield than the grass-only stands. Narrowrow alfalfa produced greater total forage mass than wide-row for the first 2 yr (P < .05), but no difference between row spacings occurred by Year 3. Cultivars NuMex and WL produced greater forage mass than the short-statured FR, especially at high density (P < .05). Alfalfa-grass mixtures increased WUE by a mean of 25% over the grass-only stands. There was no difference between row spacings for WUE, weed biomass, and weed N mass (P > .05). The alfalfa-grass mixtures reduced weed biomass by 43% over the grass-only stands. Interseeding alfalfa at wide row spacing enhanced forage productivity, WUE, and weed suppression relative to grass-only stands at lower seed cost than at narrow row spacing. Adapted hay-type alfalfa cultivars can be used to improve native-grass pastures in rainfed, semiarid environments.

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Interseeding alfalfa into native grassland for enhanced yield and water use efficiency

et al. 2020

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“…WUE values of switchgrass in Tennessee and Oklahoma were 3.5 to 6.3 mg CH 2 O per g of water transpired [37]. Sunburst switchgrass had WUE values ranging from 5.6 to 7.4 mg dry weight per gram of water used [48]. WUE of switchgrass grown in a grassland in Nebraska with little bluestem was 5 mg dry weight per gram of water transpired during the boot or heading stages and dropped to 1 mg g −1 during ripening stage [40].…”

Section: Calculating Wue With the Almanac Modelmentioning

confidence: 99%

A Review of Modeled Water Use Efficiency of Highly Productive Perennial Grasses Useful for Bioenergy

Kiniry

Kim²

2020

Agronomy

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Whole plant productivity is obviously the ultimate product of leaf photosynthesis and this has led to numerous efforts to relate the two. However, often with perennial grasses, plant productivity is more sink-limited than source-limited, causing the linkage between the photosynthetic rate and productivity to be weak or nonexistent. This has led to a different approach, characterizing plant productivity in terms of the efficiency of intercepted light use in producing biomass, also called radiation use efficiency. Likewise, the efficiency of the use of water to produce plant biomass, or water use efficiency, has been the object of much interest. The use of a simulation model to quantify biomass, using radiation use efficiency in parallel with a daily water balance simulation, allows for the effective calculation of water use efficiency. In this project, the process of determining radiation use efficiency with field data is described, as well as example values for highly productive perennial grasses useful for feedstock for bioenergy. In addition, values of water use efficiency for these grasses are reported and compared with other perennial grasses and common cultivated crops.Water requirements for growing switchgrass and giant miscanthus are often an issue. Without adequate water, their biomass yields can be reduced by 45%-80% of total biomass yields [10,11]. Moreover, competition for water with other users makes maximizing water use efficiency vitally important. Again, process-based simulation models are valuable tools since they simulate the dynamics of crop water use based on evaporation of soil water, leaf transpiration, weather, and dynamics of plant communities. Quantifying Photosynthetic Performance via Two Approaches: Single Leaf Photosynthesis vs. Radiation Use Efficiency (RUE)There are many plant simulation models based on single leaf photosynthesis, which is then scaled up to the whole leaf canopy. Such models, such as ORYZA for rice (Oryza sativa L.) [12,13], are based on the assumption that photosynthesis is a major driver and determinant for whole plant productivity. However, frequently grass systems have been shown to be more sink-limited than source-limited. They often rely more on the processes of tiller production, leaf development, and leaf canopy orientation.Examples:

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“…Según Hendrickson et al, (2013) una manera de mejorar la EUA sería lograr que la pastura genere más biomasa con la misma cantidad de agua o utilizar menos agua para producir la misma biomasa.…”

Section: Resultados Y Discusiónunclassified

Water Use Efficiency of Pastures in a Mollisol of the Semiarid Pampa

Fernández¹,

Frasier²,

Uhaldegaray³

et al. 2018

Semiárida

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RESUMENActualmente en la región semiárida pampeana se vislumbra un creciente interés por parte de los productores de incorporar nuevamente las pasturas dentro de la rotación de cultivos. En respuesta a esta demanda se planteó como objetivo evaluar la producción, calidad de forraje y la eficiencia en el uso del agua de pasturas bifíticas con y sin aporte de nitrógeno por fertilización en un Molisol de la Región Semiárida Pampeana. Los tratamientos fueron Festuca-Agropiro y Agropiro-Alfalfa sin aporte de nutrientes (T) y fertilizado con nitrógeno (F). El diseño fue en bloques completamente aleatorizados con 3 réplicas. Durante el ciclo de las pasturas se determinó la materia seca de la biomasa aérea, su digestibilidad y proteína. En cada corte de biomasa se determinó el contenido de humedad del suelo y se calculó el uso consuntivo (UC) y la eficiencia en el uso del agua (EUA). Bajo las condiciones del presente estudio los resultados mostraron que Agropiro-Alfalfa presentó mayor producción, mejor calidad y no respondió a la fertilización, comparado con Festuca-Agropiro. En esta última pastura la respuesta a la fertilización fue significativa, incidiendo tanto sobre biomasa como en el contenido de proteína. El efecto de la fertilización en Festuca-Agropiro se tradujo en primera instancia en la calidad del forraje producido y luego en la cantidad del mismo. El UC promedio durante el ciclo de ambas pasturas fue similar, 781 mm para Festuca-Agropiro y 758 mm para Agropiro-Alfalfa, la EUA promedio de los 4 años fue superior en Agropiro-Alfalfa (10,4 kg MS.ha -1 .año -1

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Water Use Efficiency by Switchgrass Compared to a Native Grass or a Native Grass Alfalfa Mixture

Cited by 23 publications

References 40 publications

Interseeding alfalfa into native grassland for enhanced yield and water use efficiency

Interseeding alfalfa into native grassland for enhanced yield and water use efficiency

A Review of Modeled Water Use Efficiency of Highly Productive Perennial Grasses Useful for Bioenergy

Water Use Efficiency of Pastures in a Mollisol of the Semiarid Pampa

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