Simulation of competition between barley and wild oats under different managements and climates

Grant, R. F.

doi:10.1016/0304-3800(94)90138-4

Cited by 26 publications

(16 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, 2002), timing of emergence (O’Donovan et al. , 1985; González‐Ponce, 1987a) and environmental conditions, including climate and soil (Grant, 1994). González‐Ponce (1987b) found that A. sterilis growing with wheat was more robust and competitive in soils with a higher content in organic matter and nutrients than in a poorer soil.…”

Section: Introductionmentioning

confidence: 99%

The competitive interactions between winter barley and Avena sterilis are site‐specific

et al. 2008

View full text Add to dashboard Cite

Summary Competition between winter barley and Avena sterilis is expected to depend on the specific conditions present in a given site. Considering that site conditions may be variable within a field, we hypothesised that the lower densities of A. sterilis frequently observed under more favourable soil conditions can be attributed to the improved growth and competitiveness of the barley crop under those conditions. Artificial populations of A. sterilis were established at three sites with different soil properties, both in the absence and the presence of a barley crop. Plant density, total biomass, dry weight per plant, seed production and seed per plant production were measured at different times in two growing seasons. Avena sterilis proved to be a generalist species when growing in monoculture, with similar seed production, regardless of the site conditions. However, when growing with the crop, differences in growth and seed production were observed at the different sites under some climatic conditions. The effect of the crop on A. sterilis biomass and seed production was more pronounced at the sites with finer textures and higher organic matter and nitrogen contents, suggesting that barley site‐specific competitive ability may contribute to limiting weed populations in favourable soils.

show abstract

Section: Introductionmentioning

confidence: 99%

The competitive interactions between winter barley and Avena sterilis are site‐specific

et al. 2008

View full text Add to dashboard Cite

show abstract

“…The energetics of these oxidation-reduction reactions determine growth yields and hence the active biomass of each hcterotrophic functional type I¾om which its decomposer activity is calculated as described in section 2.2.1. In addition, autotrophic nitriflers conduct NH4 + and NO2-oxidation [Grant, 1994a] and N20 evolution [Grant, 1995], and autotrophic methanotrophs conduct CH4 oxidation [Grant, 1999] The lower boundary of the modeled soil profile was set to prevent subsurlhce drainage or capillary rise. The upper boundary of the •nodeled soil profile was set to allow fairly rapid surface runoff so that any water accumulating beyond the surface storage capacity of the soil was rmnoved within a few hours.…”

Section: Net Primary Productivitymentioning

confidence: 99%

Controls on carbon and energy exchange by a black spruce–moss ecosystem: Testing the mathematical model Ecosys with data from the BOREAS Experiment

Grant¹,

Jarvis²,

Massheder³

et al. 2001

Global Biogeochemical Cycles

View full text Add to dashboard Cite

Abstract. Stomatal limitations to mass and energy exchange over boreal black spruce forests may be caused by low needle N concentrations that limit CO2 fixation rates. These low concentrations may be caused by low N uptake rates from cold boreal soils with high soil C:N ratios and by low N deposition rates from boreal atmospheres. A mathematical model of terrestrial ecosystems ecosys was used to examine the likelihood that slow N cycling could account for the low rates of mass and energy exchange measured over a 115-year old boreal spruce/moss forest as part of the Boreal Ecosystem-Atmosphere Study (BOREAS). In the •nodel, net N mineralization was slowed by the high C:N ratios measured in the forest floor and by high lignin contents in spruce litterfall. Slow mineralization caused low N uptake rates and hence high C:N ratios in spruce and moss leaves that reduced specific activities and areal densities of rubisco and chlorophyll. Consequent low CO2 fixation rates caused low stmnatal conductances and transpiration rates which in turn caused high soil water contents. Wet soils, in conjunction with large accumulations of surface detritus generated by slow litter mineralization, caused low soil temperatures that further slowed mineralization rates.

show abstract

“…The energetics of these oxidation-reduction reactions determine growth yields and hence the active biomass of each heterotrophic functional type from which its decomposer activity' is calculated as described in section 2.2.1. In addition, autotrophic nitrifiers conduct NH4 + and NO2-oxidation [Grant, 1994a] and N20 evolution [Grant, 1995], and autotrophic methanotrophs conduct CH4 oxidation [Grant, 1999] …”

Section: Mass and Energy Exchange In Boreal Forestsmentioning

confidence: 99%

Carbon and energy exchange by a black spruce‐moss ecosystem under changing climate: Testing the mathematical model ecosys with data from the BOREAS experiment

Grant¹,

Goulden²,

Wofsy³

et al. 2001

J. Geophys. Res.

View full text Add to dashboard Cite

Simulation of competition between barley and wild oats under different managements and climates

Cited by 26 publications

References 34 publications

The competitive interactions between winter barley and Avena sterilis are site‐specific

The competitive interactions between winter barley and Avena sterilis are site‐specific

Controls on carbon and energy exchange by a black spruce–moss ecosystem: Testing the mathematical model Ecosys with data from the BOREAS Experiment

Carbon and energy exchange by a black spruce‐moss ecosystem under changing climate: Testing the mathematical model ecosys with data from the BOREAS experiment

Contact Info

Product

Resources

About