Relative importance of shoot and root competition in dry-seeded rice growing with junglerice (Echinochloa colona) and ludwigia (Ludwigia hyssopifolia)

Chauhan, Bhagirath S. and Johnson, David E. (2010) Relative importance of shoot and root competition in dry-seeded rice growing with junglerice (Echinochloa colona) and ludwigia (Ludwigia hyssopifolia). Weed Science, 58 3: 295-299. doi:10.1614/WS-D-09-00068.1


Author Chauhan, Bhagirath S.
Johnson, David E.
Title Relative importance of shoot and root competition in dry-seeded rice growing with junglerice (Echinochloa colona) and ludwigia (Ludwigia hyssopifolia)
Formatted title
Relative importance of shoot and root competition in dry-seeded rice growing with junglerice (Echinochloa colona) and ludwigia (Ludwigia hyssopifolia
Journal name Weed Science   Check publisher's open access policy
ISSN 0043-1745
1550-2759
Publication date 2010-01-01
Sub-type Article (original research)
DOI 10.1614/WS-D-09-00068.1
Volume 58
Issue 3
Start page 295
End page 299
Total pages 5
Place of publication Lawrence, KS, United States
Publisher Weed Science Society of America
Language eng
Abstract Two separate studies were conducted to determine the relative importance of root and shoot competition in dry direct-seeded rice growing with junglerice and ludwigia. By growing rice in pots placed within larger pots such that the roots of the plants were either separated from or free to mingle with those of neighboring weeds, or by growing rice in the same pots but in the absence of weeds, the relative importance of shoot and root competition can be described. When rice was grown together with either weed species, shoot competition reduced the growth and yield of rice more than root competition. Results suggest that shoot competition for light may be the primary mechanism determining competitive outcomes between dry direct-seeded rice and junglerice or ludwigia. Junglerice was more competitive than ludwigia, which may reflect the C4 metabolism efficiency of junglerice compared to the C3 metabolism of ludwigia. Rice grain yield was highly correlated with above-and belowground biomass. The results also suggest the importance of measuring the whole plant when seeking to understand differences in the competitive ability of dry direct-seeded rice.
Keyword Dry direct-seeded rice
Dry weight
Grain yield
Root competition
Shoot competition
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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