A comparison of root and shoot competition between spring cereals and <i>Avena fatua</i> L.

Satorre, Emilio H.; Snaydon, R. W.

doi:10.1111/j.1365-3180.1992.tb01861.x

Cited by 111 publications

(101 citation statements)

References 21 publications

(17 reference statements)

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“…In a study with 20 winter wheat varieties, most that were 83 cm or taller were classified as good competitors, but two of the shortest varieties were also among the best in competing with weeds . Similarly, in a study with different varieties of wheat, barley and oat, there was little evidence that differences in shoot competitive ability were due to differences in plant height (Satorre and Snaydon 1992).…”

Section: Resultsmentioning

confidence: 99%

“…Differences among varieties within species were also identified in some crops but the differences were strongly influenced by seasonal conditions. In another study, oats and barley were found to be generally more competitive than wheat, but there were significant differences in competitiveness among varieties of the three cereals (Satorre and Snaydon 1992).…”

Section: Mots Clés: Blé Roux Vitreux De Printemps (Brvp) Blé De Prinmentioning

confidence: 99%

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Variable crop plant establishment contributes to differences in competitiveness with wild oat among cereal varieties

O’Donovan¹,

Blackshaw²,

Harker³

et al. 2005

Can. J. Plant Sci.

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R. 2005. Variable crop plant establishment contributes to differences in competitiveness with wild oat among wheat and barley varieties. Can. J. Plant Sci. 85: 771-776. Field experiments were conducted at three locations in Alberta to determine the relative competitiveness with wild oat (Avena fatua L.) of three hard red spring (HRS) and three Canada prairie spring (CPS) wheat (Triticum aestivum L.) varieties and a semidwarf hull-less barley (Hordeum vulgare L.) (Falcon), and normal height general purpose barley (AC Lacombe). Crop variety significantly affected crop yield loss, wild oat shoot dry weight and wild oat seed yield (competitive indicators). AC Lacombe barley was consistently more competitive than Falcon barley or any of the wheat varieties, while the HRS wheat varieties were mainly more competitive than the CPS varieties. Falcon barley was generally similar in competitiveness to the CPS wheat varieties. Differences among varieties in crop plant density at establishment correlated significantly with the competitive indicators suggesting that this factor contributed to the differences in competitiveness among the varieties. Crop density tended to be higher with the more competitive AC Lacombe barley and HRS wheat varieties than with the less competitive Falcon barley and CPS wheat varieties. Variety and seeding rate did not interact significantly but intentionally increasing the seeding rate improved the competitiveness of all varieties. . La variété a une incidence significative sur la réduc-tion du rendement, sur le poids sec des pousses de folle avoine et sur le rendement grainier de cette dernière (indicateurs de compétitivité). L'orge AC Lacombe est toujours plus compétitive que l'orge Falcon ou que les variétés de blé, mais les cultivars de BRVP sont passablement plus compétitifs que ceux de BPPC. L'orge Falcon est généralement aussi compétitive que les variétés de BPPC. La variation de la densité du peuplement à l'établissement de la culture présente une corrélation significative avec les indicateurs de compétitivité, signe que ce paramètre concourt aux différences de compétitivité entre les variétés. La densité du peuplement a tendance à être plus élevée chez l'orge AC Lacombe et chez les variétés de BRVP, plus compétitives, que chez l'orge Falcon et les variétés de BPPC, moins compétitives. La variété et la densité des semis n'interagissent pas de manière significative, mais l'accroissement délibéré de la densité des semis rehausse la compétitivité de toutes les variétés.

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Section: Resultsmentioning

confidence: 99%

Section: Mots Clés: Blé Roux Vitreux De Printemps (Brvp) Blé De Prinmentioning

confidence: 99%

Variable crop plant establishment contributes to differences in competitiveness with wild oat among cereal varieties

O’Donovan¹,

Blackshaw²,

Harker³

et al. 2005

Can. J. Plant Sci.

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“…Segundo Garrity et al (1992), a estatura de planta em arroz associa-se estreitamente com a supressão de plantas daninhas; contudo, pode não ser a única característica que se relaciona, pois mesmo em cultivares de porte alto foram observadas diferenças para massa seca de plantas daninhas. Já Satorre & Snaydon (1992) relataram existir pouca importância da estatura em definir a capacidade competitiva de cereais com plantas daninhas. Adicionalmente, Balbinot Jr. et al (2003), em experimento com oito cultivares de arroz que apresentavam variação de ciclo, não encontraram associação entre ciclo e estatura de planta.…”

Section: Resultsunclassified

Influência de cultivares de arroz e épocas da adubação nitrogenada nas relações de interferência da cultura com cultivar simulador de infestação de arroz-vermelho

et al. 2004

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RESUMO -O objetivo deste trabalho foi avaliar os efeitos de cultivares de arroz irrigado e de épocas de adubação nitrogenada durante o ciclo da cultura sobre a habilidade competitiva do cereal em relação ao cultivar EEA 406, usado como simulador da planta daninha arroz-vermelho. Para isso, conduziu-se experimento em campo, na estação de crescimento 2001/02. Os tratamentos, dispostos em esquema fatorial, constaram de cultivares de arroz (BRS-38 Ligeirinho, IRGA 417 e BR-IRGA 409), épocas de aplicação do nitrogênio (N) (100% do N na semeadura, 50% do N na semeadura mais 50% no início da diferenciação da panícula (IDP), 100% no IDP e testemunha sem o adubo) e populações do cultivar simulador do arroz-vermelho. Para relacionar as perdas de produtividade de grãos de arroz com populações do cultivar simulador, utilizou-se o modelo de regressão da hipérbole retangular, ajustado de modo independente para os fatores estudados. Verificou-se que a época de aplicação do N influenciou na habilidade competitiva dos cultivares de arroz. Cultivares de ciclo muito curto e curto apresentaram maior habilidade competitiva com o cultivar simulador, quando a adubação foi realizada na semeadura, enquanto o cultivar de ciclo médio se beneficiou do fracionamento da adubação na semeadura e no IDP. Palavras-chave:Oryza sativa, habilidade competitiva, práticas culturais, regressão não-linear. ABSTRACT -The objective of this study was to evaluate the effects of flooded rice cultivars and timings of nitrogen fertilizer application during the crop cycle on the competitive ability of this cereal in relation to

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“…In many studies, plant height has been shown to be a significant or even the only factor for cereal competitiveness [10,29,30]. In contrast, other researchers have indicated that plant height is of minor importance [31,32]. In a study by O'Donovan et al [15], differences in seedling establishment of wheat and barley varieties tended to influence competitive ability against wild oat (Avena fatua L.) more than did plant height.…”

Section: Discussionmentioning

confidence: 99%

Weed suppression and yield of thirteen spring wheat (Triticum aestivum L.) varieties grown in an organic system

Feledyn-Szewczyk

Jończyk

2017

Acta Agrobot

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The aim of this study was to determine the relationships between morphological features, canopy parameters, weed infestation, and grain yield of spring wheat varieties. The study was conducted in the period 2011-2013, on fields managed organically at the Experimental Station of The Institute of Soil Science and Plant Cultivation -State Research Institute, Osiny, Poland. Thirteen spring wheat varieties were sown in a randomized complete block design with four replications. Weed density and dry matter production were estimated as well biometric features of the wheat varieties at tillering (BBCH 22-24) and dough (BBCH 85-87) stages. The analyses of variance showed that the year had a stronger effect than varieties on the level of weed infestation. Pearson's correlation analysis indicated that weed number was influenced by the height of wheat plants and their aboveground biomass at the tillering stage and additionally by number of tillers at the dough stage. A significant correlation (r = −0.328, siginfficant at p < 0.05) was shown between the number of weeds and wheat grain yield. Different morphological features and canopy parameters influenced the competitive abilities of the spring wheat varieties tested. A cluster analysis detected one set of varieties with the largest ('Bombona' , 'Brawura' , 'Hewilla' , 'Kandela' , 'Katoda' , 'Łagwa' , and 'Żura') and another with the smallest ('Monsun' , 'Ostka Smolicka' , and 'Parabola') competitive abilities against weeds. The main outcome of the research is information for farmers as to which varieties are highly competitive against weeds and also high yielding. Among the varieties with the highest competitiveness, Triticum aestivum 'Żura' was the highest yielder (3.82 t ha −1 on average), whereas 'Bombona' yielded only at an average level (3.03 t ha −1). The suppressive ability of spring wheat varieties against weeds and yield potential should be both taken into account in the selection of varieties suitable for an organic farming system where weed control is absent.

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A comparison of root and shoot competition between spring cereals and Avena fatua L.

Cited by 111 publications

References 21 publications

Variable crop plant establishment contributes to differences in competitiveness with wild oat among cereal varieties

Variable crop plant establishment contributes to differences in competitiveness with wild oat among cereal varieties

Influência de cultivares de arroz e épocas da adubação nitrogenada nas relações de interferência da cultura com cultivar simulador de infestação de arroz-vermelho

Weed suppression and yield of thirteen spring wheat (Triticum aestivum L.) varieties grown in an organic system

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