Response of 10 elite “green super rice” genotypes to weed infestation in aerobic rice systems

Chauhan, Bhagirath Singh, Opena, Jhoana and Ali, Jauhar (2015) Response of 10 elite “green super rice” genotypes to weed infestation in aerobic rice systems. Plant Production Science, 18 2: 228-233. doi:10.1626/pps.18.228

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Author Chauhan, Bhagirath Singh
Opena, Jhoana
Ali, Jauhar
Title Response of 10 elite “green super rice” genotypes to weed infestation in aerobic rice systems
Journal name Plant Production Science   Check publisher's open access policy
ISSN 1349-1008
1343-943X
Publication date 2015
Sub-type Article (original research)
DOI 10.1626/pps.18.228
Open Access Status DOI
Volume 18
Issue 2
Start page 228
End page 233
Total pages 6
Place of publication Tokyo, Japan
Publisher Crop Science Society of Japan
Collection year 2016
Language eng
Formatted abstract
In recent years, water and labor shortage in Southeast Asia is driving the farmers towards dry-seeded rice systems. Weed infestation is a serious threat for adoption of these systems. A study was conducted in the wet and dry seasons to evaluate the performance of 10 elite “Green Super Rice” (a recently named group of rice genotypes bred for unfavorable marginal environments) genotypes at two different weed infestation levels (partial and moderate weed control) under dryseeded conditions. Average yield loss due to weed competition in the partial weed control treatment ranged from 12 – 57% in the wet season and 2 – 23% in the dry season. In the partial weed control plots, the drought pyramiding genotype IR83140-B-11-B performed well, resulting in 2850 and 4610 kg ha–1 of yield in the wet and dry seasons, respectively. The yield loss of this genotype in the partial weed control plots relative to the moderate weed control plots was only 21% in the wet season and 10% in the dry season. Results clearly showed that grain yield in different genotypes were positively correlated with leaf area at an early stage of the crop. The study also found negative and linear correlation between grain yield and weed biomass at harvest, demonstrating the importance of weeds in dry-seeded rice systems. The study suggested that genotypes with a larger leaf area could be integrated with other weed management strategies to achieve sustainable weed control in dry-seeded rice systems.
Keyword Plant trait
Weed biomass
Weed competitiveness
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2016 Collection
 
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