Common ragweed (<i>Ambrosia artemisiifolia</i>) dry matter allocation and partitioning under different nitrogen and density levels

Leskovšek, Robert; Datta, Avishek; Knežević, Stevan Z.; Simončič, A.

doi:10.1111/j.1445-6664.2012.00439.x

Cited by 11 publications

(11 citation statements)

References 29 publications

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“…Leskovšek et al . (,b) showed that high nitrogen levels lead to a greater allocation of biomass to the top stratum of the plants, thus increasing their ability to compete for light. Elevated atmospheric CO 2 concentrations led to a marked increase in growth (Bazzaz ), seed yield and pollen production (Ziska et al .…”

Section: Structure and Physiologymentioning

confidence: 99%

Biological Flora of the British Isles: Ambrosia artemisiifolia

et al. 2015

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Summary1. This account presents information on all aspects of the biology of Ambrosia artemisiifolia L. (Common ragweed) that are relevant to understanding its ecology. The main topics are presented within the standard framework of the Biological Flora of the British Isles: distribution, habitat, communities, responses to biotic factors, responses to environment, structure and physiology, phenology, floral and seed characters, herbivores and disease, and history, conservation, impacts and management. *Nomenclature of vascular plants follows Stace (2010) and, for non-British species, Flora Europaea.

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Section: Structure and Physiologymentioning

confidence: 99%

Biological Flora of the British Isles: Ambrosia artemisiifolia

et al. 2015

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“…Also, Leskovšek et al . () observed a decrease in male inflorescence biomass with increasing plant density in uncut ragweed populations; however, they did not state its significance level. In this study, the density did not play a role in male flowering phenology.…”

Section: Discussionmentioning

confidence: 87%

“…Also, little is known about the variation in the reproductive traits of ragweed in relation to intraspecific competition (Gebben ; Simard & Benoit ; Leskovšek et al . ).…”

mentioning

confidence: 97%

Fine‐tuning of a mowing regime, a method for the management of the invasive plant, Ambrosia artemisiifolia, at different population densities

Milakovic

Fiedler

Karrer

2014

Weed Biology and Management

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Common ragweed (Ambrosia artemisiifolia) is an invasive annual plant with highly allergenic pollen. Its spread in introduced and native ranges often occurs on roadsides, where it builds stable and rapidly growing populations. The most sustainable way of controlling the population size of this species is to prevent seed production in order to deplete the soil seed bank. Populations on roadsides are submitted to regular mowing management, which can even exacerbate the situation by inducing resprouting after cutting or by accidentally spreading seeds along the road. The population density in the juvenile stages of development could play an important role in the success of cutting regimes, as it might influence the resprouting capacity of this plant. The influence of the juvenile population density and of seven cutting regimes, differing in the timing and frequency of cuts, on easily measurable reproductive traits was investigated in a glasshouse experiment. The cutting regimes had a strong influence on the reproductive success and on the phenology of the development stages of ragweed. The population density in the juvenile stages did not play a role in further phenological development, but did influence the reproductive traits. The reproduction of ragweed can be lowered by locally adapted combinations of the timing and frequency of mowing. As the optimal management option for the reduction of both the male and female flowers, the authors suggest a first cut just before the start of male flowering, followed by subsequent cuts every 3-4 weeks.

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“…where T max and T min are the daily maximum and minimum air temperatures (C), respectively, and T base is the base temperature. A T base of 10 C was selected based on the minimum germination temperatures for common ragweed (Brandes and Nitzsche 2006, Leskovšek et al 2012a, 2012b) and soybean (Akyuz et al 2017;Major et al 1975). Partitioning coefficients are plotted as a function of GDDs accumulated since soybean emergence, where the GDD at a specific time is calculated as GDD t -(GDD t -GDD t -1 )/2.…”

Section: Data Collectionmentioning

confidence: 99%

“…However, little is known about the growth response of soybean to common ragweed competition for light or soil water. Common ragweed has been shown to increase shoot biomass allocation with increasing intraspecific competition (Leskovšek et al 2012a). Patracchini et al (2011) determined that common ragweed in monoculture produced less LAI and biomass per plant but more per unit area with increasing density.…”

Section: Introductionmentioning

confidence: 99%

Soybean and common ragweed (Ambrosia artemisiifolia) growth in monoculture and mixture

Barnes

Jhala

Knežević³

et al. 2019

Weed Technol

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Understanding how plants alter their growth in response to interplant competition is an overlooked but complex problem. Previous studies have characterized the effect of light and water stress on soybean or common ragweed growth in monoculture, but no study has characterized soybean and common ragweed growth in mixture. A field study was conducted in 2015 and 2016 at the University of Nebraska-Lincoln to characterize the growth response of soybean and common ragweed with different irrigation levels and intraspecific and interspecific interference. The experiment was arranged in a split-plot design with irrigation level (0, 50%, 100% replacement of simulated evapotranspiration) as the main plot and common ragweed density (0, 2, 6, 12 plants m−1 row) as the subplot. Crop- and weed-free controls and three mixture treatments were included as subplots. Periodic destructive samples of leaf area and biomass of different organ groups were collected, and leaf area index (LAI), aboveground biomass partitioning, specific leaf area (SLA), and leaf area ratio (LAR) were calculated. Additionally, soybean and common ragweed yield were harvested, and 100-seed weight and seed production were determined. Soybean did not alter biomass partitioning, SLA, or LAR in mixture with common ragweed. Soybean LAI, biomass, and seed size were affected by increasing common ragweed density. Conversely, common ragweed partitioned less new biomass to leaves and increased SLA in response to increased interference. Common ragweed LAI, biomass, and seed number were reduced by the presence of soybean and increasing common ragweed density; however, seed weight was not affected. Results show that adjustment in biomass partitioning, SLA, and LAR is not the method that soybean uses to remain plastic under competition for light. Common ragweed demonstrated plasticity in both biomass partitioning and SLA, indicating an ability to maintain productivity under intra- and inter-specific competition for light or soil resources.

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Common ragweed (Ambrosia artemisiifolia) dry matter allocation and partitioning under different nitrogen and density levels

Cited by 11 publications

References 29 publications

Biological Flora of the British Isles: Ambrosia artemisiifolia

Biological Flora of the British Isles: Ambrosia artemisiifolia

Fine‐tuning of a mowing regime, a method for the management of the invasive plant, Ambrosia artemisiifolia, at different population densities

Soybean and common ragweed (Ambrosia artemisiifolia) growth in monoculture and mixture

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