Associação de características de planta em cultivares de aveia com habilidade competitiva

Fleck, Nilson Gilberto; Schaedler, Carlos Eduardo; Agostinetto, Dirceu; Rigoli, R.P.; Magro, Taísa Dal; Tironi, Siumar Pedro

doi:10.1590/s0100-83582009000200001

Cited by 18 publications

(14 citation statements)

References 13 publications

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“…Abreu et al (2006) noted that the seed sowing periods and the cycle of oat cultivars presented significant effect in the biomass production, directly interacting in the best adjustment of population density. Fleck et al (2009) considered that in early stages of plant development the high population favors the fast soil coverage with benefits in the protection against erosion and weed reduction. In this context, Schuch et al (2000) discussed the importance of the fast biomass accumulation in oat, conditionstrengthened by the biomass production rate and uniformity of emergency, and the latter, directly related to the vigor of the seeds.…”

Section: Resultsmentioning

confidence: 99%

“…The same authors also observed a strong plasticity of the oat cultivars to the increase of the sowing density, condition that may favor higher stability of the harvest index by the maintenance of the relation between straw and grains, condition also observed in this study.The isolated analysis of the harvest index does not allow identification of efficient managements,because, the grain productivity is also dependent on the minimum adequate expression of leaves and stems in the biomass composition . Schaedler et al (2009) studying white oat cultivars of mid and late cycle obtained harvest index varying from 0.33 to 0.48.…”

Section: Resultsmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The sowing density on oat productivity indicators

Romitti¹,

Dornelles²,

Silva³

et al. 2017

Afr. J. Agric. Res.

View full text Add to dashboard Cite

show abstract

“…Thus, competition is a form of negative interference, in which individuals compete for shared resources, such as nutrients, physical space, water and light, and it can occur below or above ground (Casper & Jackson, 1997;Berger et al, 2008). When there is competition for environmental resources that are in short supply, there will be growth reduction and elimination of less adapted species (Fleck et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Soybeans Competitiveness with Morning Glory

et al. 2016

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-Weeds interfere negatively on development, yield and quality of soybeans (Glycine max). Inadequate weed control by herbicide use can select for resistant or tolerant biotypes, leading to a shift in the weed flora. An example is the increase of incidence of morning glory (Ipomoea spp.) in soybeans growing areas in South Brazil. The aim of this study was to determine the competitiveness of soybeans intercropped with I. triloba, I. indivisa and I. purpurea through a replacement experiments series. Greenhouse experiments were conducted in a completely randomized design with four replications. The first experiment was carried out aiming to get the plant population while total plant dry mass remained constant. Other experiments were done under replacement series experiments with soybeans and morning glory ratios of 100:0, 75:25, 50:50, 25:75 and 100:0 using the 250 plant m -2 defined by the preliminary experiment. Leaf area, root and shoots dry mass were assessed. Diagrams along with index interpretation were used to performed a competitiveness analysis. Soybeans showed greater competitiveness as I. triloba, I. purpurea and I. indivisa species for the leaf area, root and shoots dry mass variables. Intraspecific competition prevails between soybean plants whilst interspecific competition prevails for morning glory.Keywords: competition, I. triloba, I. indivisa, I. purpurea, replacement series. de-viola de 100:0, 75:25, 50:50, 25:75 e 100:0, com RESUMO -As plantas daninhas interferem negativamente no desenvolvimento

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“…Competition may be defined as the negative interaction when individuals or plants compete for environmental resources, which leads to reduction of growth or survival of the less adapted species (Zanine & Santos, 2004;Fleck et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Interference of Sorghum sudanense and Eleucine indica in the soybean and corn cultivation

Rizzardi

Wandscheer

2014

Planta daninha

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-The natural infestations are composed of numerous species that compete for environmental resources such as water, light, nutrients and space. The objective of this study was to evaluate the interference of mixed infestations Sorghum sudanense (sudangrass) and Eleusine indica (goosegrass) in the presence of soybean and corn. The experimental design was completely randomized with four replications and the experimental units consisted of plastic pots with a volume capacity of 8 L. The treatments were associations of plants S. sudanense and E. indica in the proportions 8:0, 6:2, 4:4,2:6 and 0:8, respectively, corresponding to 100, 75, 50, 25 and 0% S. sudanense and the reverse for E. indica. In all treatments remained constant four soybean or corn plants per experimental unit. The variables analyzed in the weeds were shoot dry weight, root, total and height of plants. The competitive analysis was accomplished through diagrams applied to replacement series experiment and indexes of competiveness. The results indicated that E. indica was more competitive than S. sudanense in mixed infestations with corn. Rather, S. sudanense was more competitive than E. indica, in mixed infestations with soybean, demonstrating differences in competitiveness among the weeds.Keywords: competition, Sorghum sudanense, Eleusine indica, competitive hability. RESUMO -O objetivo deste trabalho foi avaliar a interferência de infestações mistas de Sorghum sudanense (sudangrass) e Eleusine indica (goosegrass) na

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Associação de características de planta em cultivares de aveia com habilidade competitiva

Cited by 18 publications

References 13 publications

The sowing density on oat productivity indicators

The sowing density on oat productivity indicators

Soybeans Competitiveness with Morning Glory

Interference of Sorghum sudanense and Eleucine indica in the soybean and corn cultivation

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