Management of wild oat (<i>Avena fatua</i> L.) in tame oat (<i>Avena sativa</i> L.) with early seeding dates and high seeding rates

May, William E.; Shirtliffe, Steven J.; McAndrew, D.W.; Holzapfel, C. B.; Lafond, G. P.

doi:10.4141/cjps08150

Cited by 15 publications

(27 citation statements)

References 11 publications

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“…This indicates that annual canarygrass could not produce enough tillers at the lower seeding rates to completely compensate for the lower plant densities at the lower seeding rates. Similar results have been found in oat (May et al 2009b), common wheat and barley (Lafond 1994). The individual site intercepts ranged from 431 to 142 panicles m (2 , but on an individual basis none of the site intercepts significantly deviated from the overall intercept (Fig.…”

Section: Seeding Ratesupporting

confidence: 83%

“…Holt (1989) also found that seeding rate had no effect on the kernel weight of annual canarygrass. A similar response was observed in oat (May et al 2009b); however, a significant decrease in kernel weight from increasing the seeding rate has been found in common wheat and barley (Lafond 1994;O'Donovan et al 2012). The intercept was 6.8 g 1000 kernels…”

Section: Seeding Ratesupporting

confidence: 77%

“…(1 from increasing seeding rates has been reported (Lafond 1994;McKenzie et al 2005;May et al 2009b;O'Donovan et al 2012). The coefficient of variation for grain yield tended to decrease as the seeding rate increased from 15 to 55 kg ha…”

Section: Kg Hamentioning

confidence: 91%

“…Seeding rate has been shown to affect grain yield, crop uniformity, maturity, grain quality and the competitiveness of a crops like barley, oat (Avena sativa L.) and pea (Pisum sativum L.) to weeds (O'Donovan et al 1999;Johnston et al 2002;May et al 2009b). At Indian Head, SK, Holt (1989) found a small quadratic increase in grain yield as the seeding rate increased from 7.5 to 80 kg ha…”

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confidence: 99%

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Yield variability in Phalaris canariensis L. due to seeding date, seeding rate and nitrogen fertilizer

et al. 2012

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variability in Phalaris canariensis L. due to seeding date, seeding rate and nitrogen fertilizer. Can. J. Plant Sci. 92: 651Á669. Concern over the year-to-year and field-to-field variability in grain yield has consistently been expressed by annual canarygrass growers in Saskatchewan. The objectives of these studies were to understand the effects of a delayed seeding date (0, 15, 30 and 45 d), seeding rate (15, 25, 35, 45, and 55 kg ha (1 of seed) and applied N fertilizer (20, 40, 60, 80, and 100 kg N ha (1 ) on the development and yield of annual canarygrass, to improve recommendations of best management practices in annual canarygrass and to determine the impact of these factors on yield variability in annual canarygrass. To address these objectives, three single factor field experiments were conducted, at a number of sites in Saskatchewan from 1998 to 2001. Seeding date had a large effect on grain yield. Grain yield decreased as seeding was delayed by 30 and 45 d from early May. Seeding rate had a small effect on grain yield. The response curve was very shallow peaking at approximately 1310 kg ha(1 at a seeding rate of 45 kg ha (1 , with a 2.3 kg ha (1 increase in grain yield for each kg of fertilizer N in that range of rates. There was a slight increase in grain yield as the nitrogen rate increased above 40 kg ha(1 but the variation in grain yield also increased reducing the incentive for growers to use N rates above 40 kg ha (1 . Seeding date had a large effect on seed yield and could impact yield variability while seeding rate and nitrogen rate did not have a large effect on seed yield or yield variability. (20, 40, 60, 80 ou 100 kg de N par hectare) sur le de´veloppement et sur le rendement de l'alpiste roseau annuel, cela dans le but d'ame´liorer les recommandations concernant les meilleurs pratiques agronomiques pour cette culture ainsi que pour de´terminer l'impact de ces parame`tres sur la variabilite´du rendement. À cette fin, ils ont proce´de´a`trois expe´riences unifactorielles sur le terrain, a`divers endroits de la Saskatchewan, de 1998 a`2001. La date des semis influe conside´rablement sur le rendement grainier, qui diminue lorsque les semis sont reporte´s de 30 ou de 45 jours a`partir du de´but du mois de mai. La densite´de semis affecte le´ge`rement le rendement. La courbe de re´ponse pre´sente un tre`s petit pic autour de 1 310 kg par hectare, environ, a`la densite´de semis de 45 kg par hectare. La variation du rendement grainier a tendance a`s'atte´nuer quand la densite´de semis augmente. Le rendement grainier s'accroıˆt le´ge`rement avec l'application d'engrais azote´s. La courbe de re´ponse laisse entrevoir un rendement maximal de 1 215 kg par hectare lorsqu'on applique 78 kg d'engrais azote´par hectare; la majeure partie de cette hausse survient entre l'application de 20 a`40 kg de N par hectare, chaque kilo d'engrais ajoute´entraıˆnant une hausse de 2,3 kg par hectare du rendement grainier, dans cette fourchette. Le rendement grainier augmente le´ge`rement lorsque le taux d'applica...

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Section: Seeding Ratesupporting

confidence: 83%

Section: Seeding Ratesupporting

confidence: 77%

Section: Kg Hamentioning

confidence: 91%

mentioning

confidence: 99%

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Yield variability in Phalaris canariensis L. due to seeding date, seeding rate and nitrogen fertilizer

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“…Similarly, Castagna et al (1996) found a significant effect of the seeding rate on the number of grains per spike of winter spelt, which consisted in decreasing from 25.2 to 20.4 grains per spike between 200 and 400 grains m (2 . This phenomenon was also observed with oats (May et al 2009), where increasing the seeding rate (150, 250, 350 and 450 grains m (2 ) increased the plant density and spike density, but reduced the number of grains per panicle and the number of panicles per plant; the 1000-grain weight was not influenced by the seeding rate. These results highlight the theory of Grafius (1972), which suggests that plants compete for fixed resources during their development and that yield is the result of a balance among yield components.…”

Section: Effect Of Seeding Ratesupporting

confidence: 60%

Seeding rate and cultivar effects on yield, yield components and grain quality of spring spelt in eastern Canada

et al. 2015

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. 2015. Seeding rate and cultivar effects on yield, yield components and grain quality of spring spelt in eastern Canada. Can. J. Plant. Sci. 95: 841Á849. There is currently an increasing demand from master millers for spelt (Triticum aestivum ssp. spelta), but little is known about crop management of spring spelt under the eastern Canadian climate in organic or low-input systems. Field experiments were carried out at three sites in Quebec from 2011 to 2013 to assess the effect of cultivar (CDC Origin, CDC Zorba, CDC Nexon, CDC Silex) and seeding rate (250, 300, 350, 400 and 450 grains m (2 ) on grain and straw yields, yield components and some grain quality characteristics of spelt. CDC Origin produced higher hulled grain yields at all sites, while CDC Silex produced similar hulled grain yields and achieved the highest naked grain yields at two of the three test sites. The hull content varied from 24.0 to 37.6% among cultivars. CDC Origin had the highest hull content at each site. The seeding rate generally had no effect on yields, but had an effect on yield components; increasing seeding rates slightly increased the number of spikes per square metre and decreased the number of grains per spike, while the 1000-grain weight remained unaffected. Protein content of all cultivars was high (14.2 to 15.4%), while falling number varied from 219 to 385 s.

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Feasibility of a wider row spacing and recommended nitrogen in no‐till wheat

2020

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The optimal row spacing aims to maximize profitability by balancing the reduction in production costs from a wider row spacing against a potential decline in yield and increased weed pressure. A wider row spacing should increase area seeded per day, improve residue flow around seeder openers and the success of seeding between stubble rows. This study investigated the feasibility of a wider row spacing by studying the effects of row spacing (25, 30, 35, 40 cm) and N fertilizer rates (20, 40, 80, 120, 160 kg N ha −1) on development, yield, and quality of spring wheat (Triticum aestivum L.). The study was a two factorial in randomized complete block design. The experiment was conducted at Indian Head, SK, from 2013 to 2016. Row spacing affected plant, head, and seed density; however, the effects were generally inconsistent. One exception was biomass, which decreased as the row spacing increased in 3 of the 4 yr. Grain yield declined in 1 of the 4 yr, with the largest portion of the decrease occurring as the row spacing increased from 30 to 40 cm. As expected, increasing N rates produced greater grain yield, biomass, and grain protein. In conclusion, this study found that in most years the row spacing can be widened past 30 cm without a negative impact on grain yield in a no-till cropping system. However, to determine the probability of a grain yield decrease as row spacing is increased, a larger study over a wider geographic region is needed. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Management of wild oat (Avena fatua L.) in tame oat (Avena sativa L.) with early seeding dates and high seeding rates

Cited by 15 publications

References 11 publications

Yield variability in Phalaris canariensis L. due to seeding date, seeding rate and nitrogen fertilizer

Yield variability in Phalaris canariensis L. due to seeding date, seeding rate and nitrogen fertilizer

Seeding rate and cultivar effects on yield, yield components and grain quality of spring spelt in eastern Canada

Feasibility of a wider row spacing and recommended nitrogen in no‐till wheat

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