Dry Matter and Nitrogen Accumulation and Redistribution and Their Relationship to Grain Yield and Grain Protein in Oats

McMullan, Patrick M.; McVetty, P. B. E.; Urquhart, Aileen A.

doi:10.4141/cjps88-119

Cited by 16 publications

(6 citation statements)

References 24 publications

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“…AC Ronald had a 16% greater ( P < 0.05) harvest index than Triple Crown (Table 1), indicating that the short‐statured cultivar had more efficient assimilate partitioning. A positive correlation between harvest index and grain yield in oat was reported by Salman and Brinkman (1992) McMullan et al (1988) found no correlation between oat plant dry matter at maturity and grain yield of different cultivars. In the present study, the improved harvest index of AC Ronald enabled it to yield higher than Triple Crown without greater dry matter production.…”

Section: Resultsmentioning

confidence: 86%

Yield Physiology of a Semidwarf and Tall Oat Cultivar

et al. 2004

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first registered semidwarf oat cultivar. The pedigree for AC Ronald includes Dumont 68, Robert, and OT207. Brown et al. (1980) developed the semidwarf oat OT207 the eastern Canadian prairies. The introduction of semidwarf oat cultiby selecting it from OT184 irradiated with fast neutrons. vars to this region has resulted in the need for research regarding how a semidwarf oat performs relative to conventional tall oat cultivars. Oat (Avena sativa L.) production has increased dramatically inDwarfing in OT207 is controlled by a single dominant Split-split plot experiments were conducted at three site-years during gene designated Dw6, which results in shorter internodes. and 2000 in Manitoba to examine cultivar responses of 'ACThe semidwarf character in cereals is associated with Ronald', a short-stature oat, and 'Triple Crown', a tall oat, under increased yield through increased panicle production different crop rotations (grain legume or oilseed as a previous crop) (Brinkman and Rho, 1984;Hamill, 2002), kernel proand N fertilizer rates. Triple Crown had greater (P Ͻ 0.05) dry matter duction (Anderson and McLean, 1989;Hamill, 2002), production than AC Ronald at anthesis (two of three sites) and matuharvest index (Pearman et al., 1978), and lodging resisrity (one of three sites). At two of three sites, Triple Crown also tance (Brown et al., 1980). displayed higher (P Ͻ 0.05) early season plant N uptake than AC Soil water availability is a major factor limiting cereal Ronald, and Triple Crown always had higher (P Ͻ 0.05) kernel weight. grain production in western Canada (DeJong and Step-However, averaged across sites, AC Ronald yielded 433 kg ha Ϫ1 greater (P Ͻ 0.05) than Triple Crown. Higher yield for the short-puhn, 1983). There has been no previous research comstatured cultivar was attributed to greater (P Ͻ 0.05) panicle and kernel paring the ET and WUE of semidwarf and tall oat densities, and better assimilate partitioning (i.e., higher harvest index). cultivars. In studies with wheat, Richards (1992) found Both cultivars were susceptible to lodging; however, Ha significant no differences in consumptive water use between tall cultivar ϫ site interaction indicated that under some conditions, AC and dwarf cultivars, though Ehdaie and Waines (1996) Ronald experienced less lodging than Triple Crown. No significant P.J. de Rocquigny, Manitoba Agriculture, Food and Rural Initiatives, following crops (Badaruddin and Meyer, 1990; Steven-Soils and Crops Branch, Carman, MB, Canada R0G 0J0; M.H. Entz son and van Kessel, 1996). and R.M. Gentile,

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Section: Resultsmentioning

confidence: 86%

Yield Physiology of a Semidwarf and Tall Oat Cultivar

et al. 2004

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“…Isso indica diferenças genotípicas quanto aos teores de N e de clorofila entre as cultivares, que confirmam os dados obtidos por McMULLAN et al (1988), para a cultura da aveia.…”

Section: Resultsunclassified

Correlação entre teores de nitrogênio e de clorofila na folha com o rendimento de grãos de aveia branca

Wolff

Floss

2008

Cienc. Rural

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“…Reductions in the crop's vegetative growth may alter the crop's ability to accumulate and store N early in the growing season, thereby reducing available N for grain N-yield production (Brasire et al 2019). Wheat accumulates N in vegetative tissue from emergence to anthesis (Zadoks GS10-GS60) (Zadoks et al 1974), which is remobilized to the developing grain during the grain fill period (Zadoks GS60-GS90) (McMullan et al 1988;Kong et al 2016). Remobilized N from vegetative tissue is a major source of grain N, and as a result, grain protein concentration, an important grain quality parameter in CWRS wheat (Barbottin et al 2005;Kong et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Canopy management: the balance between lodging risk and nitrogen use for spring wheat production in the Canadian Prairies

et al. 2022

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Lodging risk in spring wheat has grown with the introduction of high yielding cultivars that require high nitrogen (N) inputs to optimize grain yield and protein content. Canopy management (CM) strategies have been used to reduce lodging risk. However, the short growing season and unpredictable moisture supply may limit the use of these strategies in the Canadian Prairies. The objective of this study was to quantify the ability of agronomic practices to modify the early season crop canopy, and hence lodging risk, and to determine how these practices influence N use and final grain N yield. Split-plot field trials were established at four site-years in Manitoba to evaluate CM strategies including three plant densities, a split N fertilizer application, and the application of chlormequat chloride (CCC) on canopy size (dry matter and height at anthesis), N uptake and remobilization, lodging and stalk strength, grain yield, protein, and grain N yield on the cultivar AAC Brandon. Precipitation was low during this study (64 – 78% of long-term average) resulting in modest yields and low lodging pressure. However, low plant density, split N, and CCC applications all showed potential to reduce lodging risk without reducing grain yield or protein concentration. Split N and PGR applications increased final grain N yield by 11.2 and 2.4 %, respectively. Therefore, CM practices have potential in the Canadian Prairies to reduce lodging risk without compromising grain N, but results should be validated in higher precipitation environments and across additional cultivars and growing regions of western Canada.

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Dry Matter and Nitrogen Accumulation and Redistribution and Their Relationship to Grain Yield and Grain Protein in Oats

Cited by 16 publications

References 24 publications

Yield Physiology of a Semidwarf and Tall Oat Cultivar

Yield Physiology of a Semidwarf and Tall Oat Cultivar

Correlação entre teores de nitrogênio e de clorofila na folha com o rendimento de grãos de aveia branca

Canopy management: the balance between lodging risk and nitrogen use for spring wheat production in the Canadian Prairies

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