Habilidade competitiva de cultivares de trigo com plantas daninhas

Lamego, Fabiane Pinto; Ruchel, Q.; Kaspary, Tiago Edu; Gallon, Mônica da Silva; Basso, Claudir José; Santi, Antônio Luís

doi:10.1590/s0100-83582013000300004

Cited by 46 publications

(52 citation statements)

References 15 publications

(16 reference statements)

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“…The productivity variation by the plants population is associated with the genotype potential to produce fertile tillers as the sowing density directly influences the number of ears and/or panicles produced by area (Valério et al, 2009;Castro et al, 2012). Moreover, the fast coverage of the soil by the canopy adjustment may favor the best use of light and nutrients, providing more effective control inthe evolution of the species considered invaders Lamego et al, 2013). The high variation of productivity is also associated with the large variability of cultivation conditions, the agricultural year being the major contribution factor (Storck et al, 2014;Arenhardt et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The sowing density on oat productivity indicators

Romitti¹,

Dornelles²,

Silva³

et al. 2017

Afr. J. Agric. Res.

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The sowing density adjustment in oatcan maximize the productivity expression.The aim of this study is to define the behavior of productivity expression of biomass, grains, straw andharvest indexthrough increasing sowing density in the main biotype cultivated in Southern Brazil. It proposesthe possibility of indicating higher sowing density to the productivity maximization of biomass and grains.With the densityadjusted to the grain productivity to simulate the reflexes on the biological and straw productivity and harvest index compared to recommendeddensity, considering high and reduced tillering cultivars in different succession systems.The study was carried out in 2013, 2014 and 2015 in randomized blockdesign with four replications in a 4 × 2 factorial scheme, for sowing density (100, 200, 300, 600 and 900 m -2 ) and oat cultivars (Brisasul and URS Taura), respectively, in the corn/oat and soybean/oat succession system.With the increase in sowing density, the biological and straw productivity evidence alinear behavior and the grain productivity and harvest index ofquadratic behavior, regardless of the cultivar,agricultural year and succession system. It is possible to indicate a higher sowing density to the biomass and grain productivity maximization with sowing density close to 500 seeds m -2 in the main succession systems.In high and reduced tillering cultivars, the adjusted density compared tothe recommended increasedthe biological and straw productivity, regardless of agricultural year and succession systems.

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Section: Introductionmentioning

confidence: 99%

The sowing density on oat productivity indicators

Romitti¹,

Dornelles²,

Silva³

et al. 2017

Afr. J. Agric. Res.

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show abstract

“…doi: 10.1590/S0100-83582016340200010 Weed interference affects wheat productivity, generating an increase in production costs, given the need to adopt control measures. Several weed species cause economic losses for wheat crops; however, in Southern Brazil, ryegrass (Lolium multiflorum) and turnip (Raphanus raphanistrum) are the most important ones (Lamego et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Weed Interference Periods in Early Wheat in the Midwest of Paraná

et al. 2016

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-Several factors can influence wheat crop yield, they include the interference imposed by weeds is one of the most important. The objective of this study was to evaluate the critical periods of weed interference in early wheat in the midwest of the state of Paraná, Brazil. The experiment was conducted in an experimental area located in Campo Mourão -PR, during the year 2013, using the BRS Pardela cultivar. The treatments consisted of periods of coexistence and weed control in wheat. Periods of coexistence and control were 0, 7, 14, 28, 35 and the whole cycle at days after crop emergence (DAE). Number of reproductive tillers per plant, spike length, number of spikelets per spike, plant height and wheat crop yield, were significantly affected by coexistence with prevailing infestation of Raphanus raphanistrum, therefore, a critical period of interference was determined at 16 to 24 DAE. de 0, 7, 14, 28, 35 Keywords: competition, Raphanus raphanistrum, Triticum aestivum. RESUMO -Vários fatores podem influenciar a produtividade da cultura do trigo, dos quais a interferência imposta pelas plantas daninhas é um dos mais importantes. O objetivo deste trabalho foi avaliar os períodos críticos de interferência das plantas daninhas em trigo precoce na região Centro Ocidental Paranaense. O experimento foi desenvolvido em área experimental localizada em Campo Mourão-PR, durante o ano de 2013, utilizando o cultivar BRS Pardela. Os tratamentos foram constituídos de períodos de convivência e controle das plantas daninhas na cultura do trigo. Os períodos de convivência e controle foram

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“…Among the weeds that infest canola, turnip (Raphanus sativus and R. raphanistrum) and ryegrass (Lolium multiflorum) stand out; they are highly competitive for water resources, light, CO 2 and nutrients, and, in many cases, are resistant to herbicides inhibitors of ALS (acetolactate synthase enzyme (also known as acetohydroxy acid synthase, or AHAS), ACCase (Acetyl-CoA carboxylase (ACC)) and EPSPs (5-enolpyruvylshikimate-3-phosphate). This fact has become more serious in recent years due to their use as ground cover plants (Lamego et al, 2013) and in the production of grains/seeds and/or pasture for feed.…”

Section: Introductionmentioning

confidence: 99%

Competitive Ability of Canola Hybrids With Weeds

et al. 2015

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-The objective of the study was to assess the relative competitive ability of canola hybrids in the presence of turnip (Raphanus sativus) and ryegrass (Lolium multiflorum) in different ratios of plants in the mixture. The experiments were conducted in a greenhouse, in a completely randomized design with four replications. Treatments were arranged in ratios of canola against turnip or ryegrass: 100:0, 75:25, 50:50, 25:75 and 0:100. Competitive analysis of the species was accomplished by means of diagrams usually applied to replacement series and also by the relative competitiveness indices. Fifty days after the emergence of the species, measurements of leaf area and shoot dry mass were performed. There was a competition between canola hybrids and weeds, with reduction for all variables. There was a differential competitive ability among canola hybrids in the presence of turnip and/or ryegrass. Canola hybrid Hyola 433 was more competitive in the presence of turnip than Hyola 61, 76 and 571 CL. Hyola 61, 76, 433 and 571 CL do not differ in terms of competition ability when growing with ryegrass.Keywords: Brassica napus, Raphanus sp., Lolium multiflorum. RESUMO -Objetivou-se com este trabalho avaliar a habilidade competitiva relativa de híbridos de canola na presença de biótipos de nabo (Raphanus sativus) e de azevém (Lolium multiflorum), em diferentes proporções de plantas na associação. Os experimentos foram instalados em casa de

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Habilidade competitiva de cultivares de trigo com plantas daninhas

Cited by 46 publications

References 15 publications

The sowing density on oat productivity indicators

The sowing density on oat productivity indicators

Weed Interference Periods in Early Wheat in the Midwest of Paraná

Competitive Ability of Canola Hybrids With Weeds

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