Effect of Row Spacing and Seeding Rate on Rapeseed Yield in Northwest Alberta

Christensen, J. V.; Drabble, J. C.

doi:10.4141/cjps84-137

Cited by 32 publications

(40 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, investigations by other workers, conducted under conditions free from economic infestations of pests, determined that greatest yields of canola occurred at narrower, rather than wider, row spacings. Kondra (1975) found that greater yields occurred in 15-cm rows compared with 23-, 31-or 61-cm rows, and Christensen and Drabble (1984) determined that row spacings of 7.5 cm resulted in 36% higher yields than spacings of 15 cm. Morrison et al (1990) found that plants seeded in 15-cm rows had greater yields than those in 30-cm rows, and lodged to a lesser degree.…”

Section: Discussionmentioning

confidence: 99%

Tillage regime, row spacing, and seeding rate influence infestations of root maggots (Delia spp.) (Diptera: Anthomyiidae) in canola

Dosdall¹,

Florence²,

Conway³

et al. 1998

Can. J. Plant Sci.

View full text Add to dashboard Cite

Dosdall, L. M., Florence, L. Z., Conway, P. M. and Cowle, N. T. 1998. Tillage regime, row spacing, and seeding rate influence infestations of root maggots (Delia spp.) (Diptera: Anthomyiidae) in canola. Can. J. Plant Sci. 78: 671-681. Infestations of root maggots (Delia spp.) (Diptera: Anthomyiidae) were assessed in Brassica rapa L. and Brassica napus L. grown under conventional and zero tillage regimes, at three row spacings (10, 20 and 30 cm) and three seeding rates (5.0, 7.5 and 10.0 kg ha -1 or 120, 180 and 240 plants m -2 ). The studies were conducted during two growing seasons (1995 and 1996) at each of two sites in central Alberta. Root maggot infestations were assessed by determining the numbers of eggs laid per plant during the growing season and by larval feeding damage to canola taproots assessed at the end of the season. Seed yields of the treatment plots also were determined. Plants of B. rapa were significantly more susceptible to root maggot infestations than were plants of B. napus. Root maggot egg populations and root damage were generally greater with zero tillage than with conventional tillage. Plants grown at higher seeding rates (7.5 and 10.0 kg ha -1 ) usually had less root damage than plants grown at the lowest (5.0 kg ha -1 ) seeding rate, and canola grown at wider row spacings (20 and 30 cm) had less root damage and higher yields than canola grown at the narrowest spacing (10 cm). Response surface regression analyses determined that deposition of fewest root maggot eggs per plant, least root damage and maximum yields occurred at seeding rates ranging from 7 to 11 kg ha -1 and at row spacings ranging from 17 to 25 cm. Even though canola grown in zero tillage had greater root maggot infestations than canola grown in conventional tillage, higher yields still occurred with zero tillage. Zero tillage is therefore an appropriate agronomic practice in areas infested by high populations of root maggots. Sowing B. napus rather than B. rapa, increasing seeding rates and widening row spacings are also appropriate cultural control practices for reducing crop damage from these pests. Les analyses de régression de la surface de réponse ont servi à déter-miner que les pontes de la mouche les moins abondantes par plantes, les endommagements racinaires les plus bénins et les rendements maximums survenaient à une densité de semis allant de 7 à 11 kg ha -1 et à des largeurs de l'interligne se situant entre 17 et 25 cm. Même si le semis direct donnait lieu à des infestations plus graves que le travail classique, il gardait encore l'avantage sur ce dernier sur le plan du rendement. Il demeure donc une pratique agronomique convenable dans les zones de fortes infestations par la mouche des crucifères. L'utilisation de B. napus plutôt que de B. rapa, l'accroissement de la densité de semis et l'élargissement de l'interligne sont d'autres bonnes techniques culturales de prévention des dégâts causés par ce ravageur.

show abstract

Section: Discussionmentioning

confidence: 99%

Tillage regime, row spacing, and seeding rate influence infestations of root maggots (Delia spp.) (Diptera: Anthomyiidae) in canola

Dosdall¹,

Florence²,

Conway³

et al. 1998

Can. J. Plant Sci.

View full text Add to dashboard Cite

show abstract

“…6 and l2 kg ha-r (Kondra lg75: lg7li Degenhardt and Kondra l98lb). Christensen and Drabble (1984) found no significant yield differences between seedins rates of 7 and l4 kg ha I in northwestJrn Alberta. In Saskatchewan, Clarke and Simpson (1918) and (Goeze) and Psylliodes punctulatas (Melsheimer)).…”

mentioning

confidence: 89%

Effect of Row Spacing and Seeding Rates on Summer Rape in Southern Manitoba

Morrison¹,

McVetty²,

Scarth³

1990

Can. J. Plant Sci.

View full text Add to dashboard Cite

. 1990. Effect of row spacing and seeding rates on summer rape in Southern Manitoba. Can. J. To determine the effects of varying plant densities on summer rape (Brassica napus L.), the cultivar Westar was seeded in 15-and 30-cm row spacings at seeding rates of 1.5, 3.0, 6.0, and 12.0 kg ha-r. Plants seeded in 15-cm rows yielded more per area, produced more pods per plant and lodged less than those in 30-cm rows. Higher yields were associated with a more even plant distribution and a lower degree of intrarow competition. There were no significant protein, oil and chlorophyll conce!tration differences between the row spacing treatments. The highest yields (kg ha ') were achieved with the 1.5 and 3.0 kg ha 'seeding rates. Summer rape compensated for lower plant densities with the production of more branch racemes. As seeding rate increased, competitive mortality increased, resulting in greater etiolation at bolting, and greater lodging at harvest. Seed

show abstract

“…(Kondra 1975, l9l7). Clarke and Simpson (1978) and Clarke et al (1978) suggested that higher yields could be achieved with increased rates of seeding, whereas studies conducted by Christensen and Drabble (1984) and Degenhardt and Kondra (1981) indicated seeding rates had no significant effect on yields. Crop heights were reduced with the two greatest seeding depths compared with the two shallowest depths (Table 2).…”

mentioning

confidence: 92%

“…Plant density at 10 days after emergence and at maturity ofyellow mustard sown at five dates over a 5-year period (1984 and 1986-1989) Table 7. Days to emerge and mature for yellow mustard sown at five dates over 5 years (1984 and 1986-1989) at Clarke and Simpson (1978) and by Christensen and Drabble (1984) Hegarty (1977Hegarty ( , 1978 For personal use only.…”

Section: Rate Of Seedingmentioning

confidence: 99%

Depths, rates and dates of seeding and yield of yellow mustard (Sinapis alba L.) in west-central Saskatchewan

Brandt¹

1992

Can. J. Plant Sci.

View full text Add to dashboard Cite

Effect of Row Spacing and Seeding Rate on Rapeseed Yield in Northwest Alberta

Cited by 32 publications

References 3 publications

Tillage regime, row spacing, and seeding rate influence infestations of root maggots (Delia spp.) (Diptera: Anthomyiidae) in canola

Tillage regime, row spacing, and seeding rate influence infestations of root maggots (Delia spp.) (Diptera: Anthomyiidae) in canola

Effect of Row Spacing and Seeding Rates on Summer Rape in Southern Manitoba

Depths, rates and dates of seeding and yield of yellow mustard (Sinapis alba L.) in west-central Saskatchewan

Contact Info

Product

Resources

About