Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-15T22:11:48.776Z Has data issue: false hasContentIssue false
  • English
  • Français

Oryza sativa plant traits conferring competitive ability against weeds

Published online by Cambridge University Press:  20 January 2017

H. Ni ,
K. Moody ,
R. P. Robles ,
E. C. Paller Jr.  and
J. S. Lales
K. Moody
Affiliation:
International Rice Research Institute, Los Baños, Laguna, Philippines
R. P. Robles
Affiliation:
Department of Agronomy, University of the Philippines, Los Baños, Laguna, Philippines
E. C. Paller Jr.
Affiliation:
Department of Agronomy, University of the Philippines, Los Baños, Laguna, Philippines
J. S. Lales
Affiliation:
Department of Agronomy, University of the Philippines, Los Baños, Laguna, Philippines
Get access Rights & Permissions [Opens in a new window]

Abstract

This study was conducted in lowland fields at the International Rice Research Institute in the 1994 wet season and the 1995 dry season to determine Oryza sativa plant traits that confer competitive ability against weeds when pregerminated seeds are sown on puddled soil. Initial biomass (IB), crop growth rate (CGR), leaf area index (LAI), and biomass at tillering of O. sativa plants were associated with their competitiveness against weeds, whereas relative growth rate, net assimilation rate, and tillering capacity of O. sativa were not. Biomass at tillering affected weed biomass directly, and IB, CGR, and LAI indirectly affected weed biomass through O. sativa biomass. Biomass at tillering was the best predictor of modern cultivar competitiveness against weeds.

Keywords

Oryza sativa L., riceInterferencephenotypeweed suppression
Type
Research Article
Information
Weed Science , Volume 48 , Issue 2 , April 2000 , pp. 200 - 204
Copyright
Copyright © Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

Amarante, S. T., Migo, T. R., Wade, L. J., and Kropff, M. J. 1995. Competitive ability of rice cultivars with Echinochloa colona L. in rain-fed lowland rice. Philipp. J. Crop Sci. 20 (Suppl.): 53.Google Scholar
Baki, B. B. and Azmi, M. 1994. Integrated management of paddy and aquatic weeds in Malaysia: current status and prospects for improvement. Pages 46–77 In Shibayama, H., Kiritani, K., and Bay-Peterson, J., eds. Integrated Management of Paddy and Aquatic Weeds and Prospects for Biological Control. Taipei, Taiwan: Food and Fertilizer Technology Center for the Asian and Pacific Region, FFTC Book Series No. 45.Google Scholar
Berkowitz, A. R. 1988. Competition for resources in weed-crop mixtures. Pages 89–120 In Altieri, M. A. and Liebman, M., eds. Weed Management in Agroecosystems: Ecological Approaches. Boca Raton, FL: CRC Press.Google Scholar
Garrity, D. P., Movillon, M., and Moody, K. 1992. Differential weed suppression ability in upland rice cultivars. Agron. J. 84:586–591.CrossRefGoogle Scholar
Gaudet, C. L. and Keddy, P. A. 1988. A comparative approach to predicting competitive ability from plant traits. Nature 334:242–243.CrossRefGoogle Scholar
Grace, J. B. 1990. On the relationship between plant traits and competitive ability. Pages 51–65 In Grace, J. B. and Tilman, D., eds. Perspectives on Plant Competition. San Diego, CA: Academic Press.Google Scholar
Grime, J. P. 1977. Evidence for the existence of three primary strategies in plants and its relevance to ecological and evolutionary theory. Am. Nature 111:1169–1194.CrossRefGoogle Scholar
Holt, J. S. and Ocrutt, D. R. 1991. Functional relationships of growth and competitiveness in perennial weeds and cotton (Gossypium hirsutum). Weed Sci. 39:575–584.CrossRefGoogle Scholar
Janiya, J. D. and Moody, K. 1989. Competitive ability of an F1 rice hybrid. Philipp. J. Weed Sci. 16:20–32.Google Scholar
Jennings, P. R. and Aquino, R. C. 1968. Studies on competition in rice. III. The mechanism of competition among phenotypes. Evolution 22:529–542.Google ScholarPubMed
Kawano, K., Gonzalez, H., and Lucena, M. 1974. Intraspecific competition, competition with weeds, and spacing response in rice. Crop Sci. 14:841–845.CrossRefGoogle Scholar
Kim, S. C and Moody, K. 1980. Effect of plant spacing on the competitive ability of rice growing in association with various weed communities at different nitrogen levels. J. Korean Soc. Crop Sci. 25:17–27.Google Scholar
Kropff, M. J., Lotz, L.A.P., and Weaver, S. E. 1993. Practical application. Pages 149–168 In Kropff, M. J. and van Laar, H. H., eds. Modelling Crop-Weed Interactions. Wallingford, U.K.: CAB International.Google Scholar
Minotti, P. L. and Sweet, R. D. 1981. Role of crop competition in limiting losses from weeds. Pages 351–367 In Pimentel, D., ed. Handbook of Pest Management in Agriculture. Boca Raton, FL: CRC Press.Google Scholar
Quintero, H. 1986. Competitive ability of different upland rice cultivars against weeds. . University of Philippines Los Banos, Laguna, Philippines. 234 p.Google Scholar
Rajan, A., Singh, S., Ibrahim, Y., and Wanharum, W. S. 1995. Applications of INTERCOM model in plant breeding—model validation and effect of early leaf area growth on crop-weed competition in direct-seeded rice. Pages 67–74 In Aggarwal, P. K., Matthews, R. B., Kropff, M. J., and van Laar, H. H., eds. SARP Research Proceedings—Applications of Systems Approaches in Plant Breeding. Los Baños, Laguna, Philippines: April 18-May 6, 1994.Google Scholar
Roush, M. L. and Radosevich, S. R. 1985. Relationships between growth and competitiveness of four annual weeds. J. Appl. Ecol. 22:895–905.CrossRefGoogle Scholar
[SAS] Statistical Analysis Systems. 1987. SAS/STAT Guide for Personal Computers. 6th ed. Cary, NC: Statistical Analysis Systems Institute. 1028 p.Google Scholar
Williams, W. A., Jones, M. B., and Demment, M. W. 1990. A concise table for path analysis statistics. Agron. J. 82:1022–1024.CrossRefGoogle Scholar