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Canola (Brassica rapa) Plant Density Influences Tartary Buckwheat (Fagopyrum tataricum) Interference, Biomass, and Seed Yield

Published online by Cambridge University Press:  12 June 2017

John T. O'Donovan
John T. O'Donovan*
Affiliation:
Alberta Environmental Centre, Vegreville, T9C 1T4
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Abstract

Field experiments were conducted at Vegreville, Alberta, in 1990, 1991, and 1992 to investigate the influence of canola plant density and row spacing (1991 and 1992 only) on interference from Tartary buckwheat. Nonlinear regression equations incorporating both canola and Tartary buckwheat density provided good descriptions of the data. Parameter estimates for both weed and crop density were significant (P < 0.05) but did not differ between row spacings. Where no Tartary buckwheat plants were present, canola yield was little affected by canola plant density. At a given Tartary buckwheat density, canola seed yield increased as canola plant density increased, while Tartary buckwheat shoot weight and seed yield decreased. None of the factors significantly affected canola 1000-seed weight, or oil or protein levels in the canola seed. The results suggest that seeding canola to achieve a density of approximately 200 plants m–2 will significantly reduce the impact of weeds on canola yield, as well as reduce weed biomass and seed yield.

Keywords

Tartary buckwheat, Fagopyrum tataricum L. J. Gaertn # FACTAcanola, Brassica rapa L. ‘Tobin.’Plant densityoilproteinnonchemical weed controlweed interferenceFAGTA
Type
Weed Biology and Ecology
Information
Weed Science , Volume 42 , Issue 3 , September 1994 , pp. 385 - 389
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

Literature Cited

1. Andersson, B. 1986. Influence of crop density and spacing on weed competition and grain yield in wheat and barley. Pages 121–128 in Proc. Eur. Weed Res. Symp.Google Scholar
2. Anonymous. 1985. Canola production in Alberta. Agdex 149/20–1 31 pp.Google Scholar
3. Barton, D. L., Thill, D. C., and Bahman, S. 1992. Integrated wild oat (Avena fatua) management affects spring barley (Hordeum vulgare) yield and economics. Weed Technol. 6:129–135.Google Scholar
4. Carlson, H. L. and Hill, J. E. 1985. Wild oat (Avena fatua) competition in spring wheat: Plant density effects. Weed Sci. 33:176–181.Google Scholar
5. Christensen, J. V. and Drabble, J. C. 1984. Effect of row spacing and seeding rate on rapeseed yield in Northwest Alberta. Can. J. Plant Sci. 64:1011–1013.Google Scholar
6. Clarke, J. M., Clarke, F. R., and Simpson, G. M. 1978. Effect of method and rate of seeding on yield of Brassica napus . Can. J. Plant Sci. 58:549–550.Google Scholar
7. Clarke, J. M. and Simpson, G. M., 1978. Influence of irrigation and seeding rates on yield and yield components of Brassica napus cv. Tower. Can. J. Plant Sci. 58:731–737.CrossRefGoogle Scholar
8. Cousens, R. 1985. An empirical model relating crop yield to weed and crop density and a statistical comparison with other models. J. Agric. Sci. (Camb.) 105:513–521.Google Scholar
9. Cudney, D. W., Jordan, L. S., Holt, J. S., and Reints, J. S. 1989. Competitive interactions of wheat (Triticum aestivum) and wild oats (Avena fatua) grown at different densities. Weed Sci. 37:538–543.Google Scholar
10. Degenhardt, D. F. and Kondra, Z. P. 1981. The influence of seeding date and seeding rate on seed yield and yield components of five genotypes of Brassica napus . Can. J. Plant Sci. 61:185–190.Google Scholar
11. de St. Remy, E. A., O'Donovan, J. T., Tong, A. K. W., O'Sullivan, P. A., Sharma, M. P., and Dew, D. A. 1985. Influence of Tartary buckwheat (Fagopyrum tataricum) density on yield loss of barley (Hordeum vulgare) and wheat (Triticum aestivum). Weed Sci. 33:521–523.Google Scholar
12. de St. Remy, E. A. and O'Sullivan, P. A. 1986. Duration of Tartary buckwheat (Fagopyrum tataricum) interference in several crops. Weed Sci. 34:281–286.Google Scholar
13. Evans, R. M., Thill, D. C., Thapia, L. S., Shafii, B., and Lish, J. M. 1991. Wild oat (Avena fatua) and spring barley (Hordeum vulgare) density affect spring barley grain yield. Weed Technol. 5:33–39.Google Scholar
14. Hume, L. 1985. Crop losses in wheat (Triticum aestivum) as determined using weeded and nonweeded quadrats. Weed Sci. 33:734–740.Google Scholar
15. Kondra, Z. P. 1977. Effect of planted seed size and seeding rate on rapeseed. Can. J. Plant Sci. 57:277–280.Google Scholar
16. Kondra, Z. P. 1975. Effect of row spacing and seeding rate on rapeseed. Can. J. Plant Sci. 55:339–341.Google Scholar
17. Koutsoyiannis, A. 1977. Pages 81–91 in Theory of Econometrics. 2nd ed. MacMillan Education, Ltd., London, U.K. Google Scholar
18. Lawson, H. M. 1983. Competition between annual weeds and vining peas grown at a range of population densities. Weed Res. 22:27–38.Google Scholar
19. McGregor, D. I. 1987. Effect of plant density on development and yield of rapeseed and its significance to recovery from hail injury. Can. J. Plant Sci. 67:43–51.Google Scholar
20. Morrison, M. J., McVetty, P. B. E., and Scarth, R. 1990. Effect of row spacing and seeding rate on summer rape in southern Manitoba. Can. J. Plant. Sci. 70:127–137.Google Scholar
21. O'Donovan, J. T., Kirkland, K. J., and Sharma, A. K. 1989. Canola yield and profitability as influenced by volunteer wheat infestations. Can. J. Plant Sci. 69:1235–1244.Google Scholar
22. O'Donovan, J. T., Sharma, A. K., Kirkland, K. J., and de St. Remy, E. A. 1988. Volunteer barley interference in canola (Brassica campestris and B. napus). Weed Sci. 36:734–739.Google Scholar
23. Orwick, P. L. and Schreiber, M. M. 1979. Interference of redroot pigweed (Amaranthus retroflexus) and robust foxtail (Setaria viridis var. robustaalba or var. robusta-purpurea) in soybeans (Glycine max). Weed Sci. 27:665–674.Google Scholar
24. Robertson, J. A. and Morrison, W. H. III. 1974. Analysis of oil content of sunflower seed by wide line NMR. JAOCS 56:911–964.Google Scholar
25. Sims, R. E. H. 1976. Effects of planting pattern and sowing method on the seed yield of safflower, oilseed rape and lupin. N.Z. J. Exp. Agric. 4:185–189.Google Scholar
26. Statistical Analysis System Institute, Inc. 1987. SAS/STA™ guide for personal computers. Version 6 ed. SAS Inst., Inc., Cary, NC. 1028 pp.Google Scholar
27. Teasdale, J. R. and Frank, J. R. 1983. Effect of row spacing on weed competition with snap beans (Phaseolus vulgaris). Weed Sci. 31:81–85.Google Scholar
28. Thomas, P. 1984. Pages 811–812 in Canola Growers Manual. Canola Council of Canada Publ., Winnipeg, Manitoba, Canada.Google Scholar