Response of rice genotypes to weed competition in dry direct-seeded rice in India
The differential weed-competitive abilities of eight rice genotypes and the traits that may confer such attributes were investigated under partial weedy and weed-free conditions in naturally occurring weed flora in dry direct-seeded rice during the rainy seasons of 2011 and 2012 at Ludhiana, Punjab,...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Hindawi Limited
2014
|
| Online Access: | https://hdl.handle.net/10568/165562 |
| _version_ | 1855531694260486144 |
|---|---|
| author | Mahajan, Gulshan Ramesha, Mugalodi S. Chauhan, Bhagirath S. |
| author_browse | Chauhan, Bhagirath S. Mahajan, Gulshan Ramesha, Mugalodi S. |
| author_facet | Mahajan, Gulshan Ramesha, Mugalodi S. Chauhan, Bhagirath S. |
| author_sort | Mahajan, Gulshan |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The differential weed-competitive abilities of eight rice genotypes and the traits that may confer such attributes were investigated under partial weedy and weed-free conditions in naturally occurring weed flora in dry direct-seeded rice during the rainy seasons of 2011 and 2012 at Ludhiana, Punjab, India. The results showed genotypic differences in competitiveness against weeds. In weed-free plots, grain yield varied from 6.6 to 8.9 t ha−1across different genotypes; it was lowest for PR-115 and highest for the hybrid H-97158. In partial weedy plots, grain yield and weed biomass at flowering varied from 3.6 to 6.7 t ha−1and from 174 to 419 g m−2, respectively. In partial weedy plots, grain yield was lowest for PR-115 and highest for PR-120. Average yield loss due to weed competition ranged from 21 to 46% in different rice genotypes. The study showed that early canopy closure, high leaf area index at early stage, and high root biomass and volume correlated positively with competitiveness. This study suggests that some traits (root biomass, leaf area index, and shoot biomass at the early stage) could play an important role in conferring weed competitiveness and these traits can be explored for dry-seeded rice. |
| format | Journal Article |
| id | CGSpace165562 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Hindawi Limited |
| publisherStr | Hindawi Limited |
| record_format | dspace |
| spelling | CGSpace1655622025-12-08T10:29:22Z Response of rice genotypes to weed competition in dry direct-seeded rice in India Mahajan, Gulshan Ramesha, Mugalodi S. Chauhan, Bhagirath S. The differential weed-competitive abilities of eight rice genotypes and the traits that may confer such attributes were investigated under partial weedy and weed-free conditions in naturally occurring weed flora in dry direct-seeded rice during the rainy seasons of 2011 and 2012 at Ludhiana, Punjab, India. The results showed genotypic differences in competitiveness against weeds. In weed-free plots, grain yield varied from 6.6 to 8.9 t ha−1across different genotypes; it was lowest for PR-115 and highest for the hybrid H-97158. In partial weedy plots, grain yield and weed biomass at flowering varied from 3.6 to 6.7 t ha−1and from 174 to 419 g m−2, respectively. In partial weedy plots, grain yield was lowest for PR-115 and highest for PR-120. Average yield loss due to weed competition ranged from 21 to 46% in different rice genotypes. The study showed that early canopy closure, high leaf area index at early stage, and high root biomass and volume correlated positively with competitiveness. This study suggests that some traits (root biomass, leaf area index, and shoot biomass at the early stage) could play an important role in conferring weed competitiveness and these traits can be explored for dry-seeded rice. 2014 2024-12-19T12:55:11Z 2024-12-19T12:55:11Z Journal Article https://hdl.handle.net/10568/165562 en Open Access Hindawi Limited Mahajan, Gulshan; Ramesha, Mugalodi S. and Chauhan, Bhagirath S. 2014. Response of rice genotypes to weed competition in dry direct-seeded rice in India. The Scientific World Journal, Volume 2014 p. 1-8 |
| spellingShingle | Mahajan, Gulshan Ramesha, Mugalodi S. Chauhan, Bhagirath S. Response of rice genotypes to weed competition in dry direct-seeded rice in India |
| title | Response of rice genotypes to weed competition in dry direct-seeded rice in India |
| title_full | Response of rice genotypes to weed competition in dry direct-seeded rice in India |
| title_fullStr | Response of rice genotypes to weed competition in dry direct-seeded rice in India |
| title_full_unstemmed | Response of rice genotypes to weed competition in dry direct-seeded rice in India |
| title_short | Response of rice genotypes to weed competition in dry direct-seeded rice in India |
| title_sort | response of rice genotypes to weed competition in dry direct seeded rice in india |
| url | https://hdl.handle.net/10568/165562 |
| work_keys_str_mv | AT mahajangulshan responseofricegenotypestoweedcompetitionindrydirectseededriceinindia AT rameshamugalodis responseofricegenotypestoweedcompetitionindrydirectseededriceinindia AT chauhanbhagiraths responseofricegenotypestoweedcompetitionindrydirectseededriceinindia |