The effect of varying seed rate on the yield and yield components of oil-seed rape (<i>Brassica napus</i>)

Scarisbrick, D. H.; Daniels, R. W.; Rawi, A. B. Noor

doi:10.1017/s0021859600031245

Cited by 28 publications

(19 citation statements)

References 4 publications

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“…Morrison et al (1990 Scarisbrick et al (1982) who reported that the lowest harvest index occurred at the highest seeding rate, while no differences occurred at lower seeding rates (for seeding rates between 4.5 and 13.5 kg ha-r;. Similar results were obtained by Degenhardt and Kondra (1981a) (Loof 1960 (1915,1977) …”

supporting

confidence: 74%

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

Deynze¹,

McVetty²,

Scarth³

et al. 1992

Can. J. Plant Sci.

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To compare the effects of varying seeding rate on the agronomic performance, phenology and seed quality of hybrid and conventional summer rape cultivars. fbur hybrid and two conventional summer rape cultivars were seeded at 1.5,3.0,4.5,6.0 and 9.0 kg ha 'at two locations fbr 3 yr. The hybrid cultivars were, very imponantly .24vo hither yielding and pruluced 50% more toual dry manei than the ionventional cultivars.The hybrid cultivars were, on average, 1.3 % lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil end protein in the seed compared wittr the conventional cultivars. The hybrid cultivars were on average, 1.3 d later to 50% flowering and l. I d later to maturity than the average for the conventional cultivars, (i.e., equal or earlier to flowering and maturity than Regent). The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophylt content than the conventional cultivars.In spite of these differences, there were no significant cultivar-by-seeding-rate interactions, indicating that the hybrid and conventional cultivars responded similarly to varying seeding rate. Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate. Stand at maturity, seed yield and total dry matter production displayed significant linear and quadratic responses to varying seeding rate. Varying seeding rate had no effect on seed fbrmation period, the sum of oil and protein content, or chlorophyll content. A seeding rate of 6 kg ha ' maximiied seed yield fbr both hybiid and conventional su--er rape cultivars.

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supporting

confidence: 74%

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

Deynze¹,

McVetty²,

Scarth³

et al. 1992

Can. J. Plant Sci.

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“…In general, Brassica napus cultivars lodge after pod filling, particularly in situations with high plant populations and therefore weaker stems (Scarisbrick et al. 1982).…”

Section: Resultsmentioning

confidence: 99%

“…Most of the final seed yield is contributed by the terminal raceme on the main stem and pods on the primary branches in rape seed genotypes. Pods on secondary branches are of minor importance in the determination of seed yield in this crop (Campbel and Kondra 1978, Geisler 1980, Scarisbrick et al. 1982).…”

Section: Resultsmentioning

confidence: 99%

The Influence of Row Spacing and Seeding Rate on Seed Yield and Yield Components of Forage Turnip (Brassica rapa L.)

Bilgili¹,

Sincik²,

Uzun³

et al. 2003

J Agronomy Crop Science

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The effects of four row spacings (17.5, 35.0, 52.5 and 70.0 cm) and five seeding rates (50, 100, 200, 400 and 800 viable seeds m−2) on seed yield and some yield components of forage turnip (Brassica rapa L.) were evaluated under rainfed conditions in Bursa, Turkey in the 1998–1999 and 1999–2000 growing seasons. Plant height, stem diameter, pods/terminal raceme, total pods/plant, seeds/pod and primary branches/plant were measured individually. The number of plants per unit area was counted and the lodging rate of the plots was scored. The seed yield and 1000‐seed weight were also determined. Row spacing and seeding rate significantly affected most yield components measured. The number of plants per unit area increased with increasing seeding rate and decreasing row spacing. Plant height was not greatly influenced by row spacing and seeding rate, but higher seeding rates reduced the number of primary branches and the stem diameter. The number of pods/main stem was affected by row spacing and but not by the seeding rate. Also, the number of seeds per pod was not affected by either the row spacing or the seeding rate. In contrast, the number of pods per plant clearly increased with increasing row spacing, but decreased with increasing seeding rate. The plots seeded at narrow row spacings and at high seeding rates were more sensitive to lodging. Seeding rate had no significant effect on seed yield in both years. Seed yield was similar at all seeding rates, averaging 1151 kg ha−1. However, row spacing was associated with seed yield. The highest seed yield (1409 kg ha−1) was obtained for the 35.0‐cm row spacing and 200 seeds m−2 seeding rate combination without serious lodging problems.

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“…Plants with more space and less competition for light and nutrients grow to a larger size, as shown with maize (Edmeades and Daynard, 1979) and oilseed rape (Morrison et al, 1990). Compensatory growth at lower seeding rates has been shown to result in similar yields per hectare for both oilseed rape (Scarisbrick et al, 1982) and maize (Marsalis et al, 2010). Moreover, planting fewer treated seeds per unit areas would have the added advantage of causing less total environmental contamination, given that only a small proportion (2-20%) of the chemical applied to seeds is absorbed by the plant (Shmuck et al, 2001;Sur andStork, 2003 Sur andStork, 2003).…”

Section: Discussionmentioning

confidence: 97%

Size matters: Significant negative relationship between mature plant mass and residual neonicotinoid levels in seed-treated oilseed rape and maize crops

Balfour

Carreck

Blanchard

et al. 2016

Agriculture, Ecosystems & Environment

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The effect of varying seed rate on the yield and yield components of oil-seed rape (Brassica napus)

Cited by 28 publications

References 4 publications

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

The Influence of Row Spacing and Seeding Rate on Seed Yield and Yield Components of Forage Turnip (Brassica rapa L.)

Size matters: Significant negative relationship between mature plant mass and residual neonicotinoid levels in seed-treated oilseed rape and maize crops

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