Hostname: page-component-7dd5485656-k8lnt Total loading time: 0 Render date: 2025-10-30T20:16:25.362Z Has data issue: false hasContentIssue false
  • English
  • Français

Competition Between Upland Rice and Purple Nutsedge for Nitrogen, Moisture, and Light

Published online by Cambridge University Press:  12 June 2017

L. I. Okafor  and
S. K. De Datta
L. I. Okafor*
Affiliation:
Dept. of Agronomy, International Rice Res. Inst., Los Baños, Laguna, Philippines
S. K. De Datta*
Affiliation:
Dept. of Agronomy, International Rice Res. Inst., Los Baños, Laguna, Philippines
*
Mail address P.O. Box 933, Manila, Philippines
Mail address P.O. Box 933, Manila, Philippines
Get access Rights & Permissions [Opens in a new window]

Abstract

Field experiments were conducted on clay and clay loam soils at the International Rice Research Institute to investigate the effects of competition between upland rice (Oryza sativa L.) and varying populations of purple nutsedge (Cyperus rotundus L.) for nitrogen, moisture, and light on the grain yield of upland rice. ‘IR5’ was used in 1972, while the experimental line ‘IR442-2-58’ was used in 1973. Grain yields of ‘IR5’ and ‘IR442-2-58’ increased with 60 kg/ha of nitrogen, and decreased with increased purple nutsedge population. The application of nitrogen to weedy upland rice fields benefited the purple nutsedge more than the rice. Purple nutsedge and upland rice competed extensively for moisture and the competition was much more serious with increased nitrogen fertilization. Purple nutsedge competition reduced the light transmission ratio (LTR). The reduction was proportional to the increase in purple nutsedge population density. Reductions in the LTR were greater at higher nitrogen levels during the three seasons.

Information

Type
Research Article
Information
Weed Science , Volume 24 , Issue 1 , January 1976 , pp. 43 - 46
Copyright
Copyright © 1976 by the 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.)

Article purchase

Temporarily unavailable

Footnotes

Present address of senior author: School of Plant Biology, Univ. Coll. of North Wales, Bangor, U.K.

References

Literature Cited

1. Blackman, C.E. and Templeman, W.G. 1938. The nature of the competition between cereal crops and annual weeds. J. Agric. Sci. 28:247–271.Google Scholar
2. Crafts, A.S. and Robbins, W.W. 1962. Weed control. McGraw-Hill Book Co., New York. 660 pp.Google Scholar
3. De Datta, S.K. and Magnaye, C.P. 1969. A survey of the forms and sources of fertilizer nitrogen for flooded rice. Soils Fert. 32(2):103–109.Google Scholar
4. De Datta, S.K., Moomaw, J.C., and Bantilan, R.T. 1969. Effects of varietal type, method of planting and nitrogen level on competition between rice and weeds. Proc. 2nd Asian-Pacific Weed Control Interchange, College, Laguna, Philippines. p. 152–163.Google Scholar
5. Fryer, J.D. and Evans, S.A. 1970. Weed Control Handbook. Volume 1. Principles. Issued by the British Crop Protection Council, Blackwell Scientific Publications, Oxford and Edinburgh. 494 pp.Google Scholar
6. Holm, L. and Herberger, J. 1969. The world's worst weeds. Proc. 2nd Asian-Pacific Weed Control Interchange, College, Laguna, Philippines. p. 1–14.Google Scholar
7. International Rice Research Institute. 1966. Annual report 1965. Int. Rice Res. Inst., Los Banos, Laguna, Philippines. 326 pp.Google Scholar
8. Klingman, G.C. 1966. Weed control: As a science. John Wiley and Sons, Inc., New York. 421 pp.Google Scholar
9. Misra, K.C., Pandey, H.N., and Mukherjee, K.L. 1968. Crop weed competition for phosphate nutrition. Trop Ecol. 9:243–250.Google Scholar
10. Okafor, L.I. and De Datta, S.K. 1974. Competition between weeds and upland rice in Monsoon Asia. Philippine Weed Sci. Bull. 1:39–45.Google Scholar
11. Pande, H.K. and Bhan, V.M. 1966. Effect of row spacings and levels of fertilization on growth, yield and nutrient uptake of upland paddy and on associated weeds. Il Riso 15(1):47–65.Google Scholar
12. Park, J.K. and Kim, D.S. 1971. Distribution of weeds and their competition with rice in Korea. Proc. 3rd Asian-Pacific Weed Control Interchange, Kuala Lumpur. p. 1–12.Google Scholar
13. Sugar Manufacturers' Association of Jamaica, Ltd. 1968 (1969). Weed competition trials. Rep. Sugar Mfrs' Ass. Jamaica, Ltd., p. 10–12.Google Scholar
14. Vega, M.R., Ona, J.D., and Paller, E.C. Jr. 1967. Weed control in upland rice at the University of the Philippines College of Agriculture. Philippine Agriculturist 51(5):397–411.Google Scholar
15. Yoshida, S., Forno, D.A., Cock, J.M., and Gomez, K.A. 1972. Laboratory Manual for Physiological Studies of Rice. Int. Rice Res. Inst., Los Banos, Laguna, Philippines. 70 pp.Google Scholar