Influence of tillage, cover cropping, and herbicides on weeds and productivity of dry direct-seeded rice

Singh, Manpreet, Bhullar, Makhan S. and Chauhan, Bhagirath S. (2015) Influence of tillage, cover cropping, and herbicides on weeds and productivity of dry direct-seeded rice. Soil and Tillage Research, 147 39-49. doi:10.1016/j.still.2014.11.007

Author Singh, Manpreet
Bhullar, Makhan S.
Chauhan, Bhagirath S.
Title Influence of tillage, cover cropping, and herbicides on weeds and productivity of dry direct-seeded rice
Journal name Soil and Tillage Research   Check publisher's open access policy
ISSN 0167-1987
Publication date 2015
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.still.2014.11.007
Open Access Status
Volume 147
Start page 39
End page 49
Total pages 11
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Formatted abstract
The adoption of dry direct seeding of rice in many Asian countries has resulted in increased interest among weed scientists to improve weed management strategies, because of the large and complex weed flora associated with dry-seeded rice (DSR). Tillage and cover cropping practices can be integrated into weed management strategies as these have been known to affect weed emergence for several ecological reasons. A study was conducted in the summer seasons of 2012 and 2013 at the Punjab Agricultural University, Ludhiana, India, to evaluate the effects of tillage, cover cropping, and herbicides on weed growth and grain yield of DSR. Most of the weed species (Echinochloa crus-galli, Echinochloa colona, Eleusine indica, and Euphorbia hirta) under study tended to populate the cover crop (CC) treatment more than the no-cover crop (no-CC) treatment. Zero tillage (ZT) resulted in higher weed densities of most of the weed species studied. The interaction effects of these treatments suggest that lesser herbicide efficacy in ZT and CC plots led to higher weed pressure and weed biomass. Grain yield was significantly higher in the conventional tillage system (2.40–3.32 t ha−1), because of lesser weed pressure, than in ZT (2.08–2.73 t ha−1). Almost all weed species increased in number and biomass production in the second year (2013) compared with the preceding year. Herbicide application (pendimethalin followed by bispyribac-sodium) alone, though significantly increased DSR grain yield over that of the unsprayed check, resulted in lesser grain yield compared with the weed-free check (5.07–5.12 t ha−1) by 14% and 27% in 2012 and 2013, respectively. This was mainly due to the buildup of biomass by weeds that escaped from herbicide application. The study reveals that conservation practices such as ZT can form an important component of integrated weed management in DSR, provided that herbicide efficacy be improved by adjusting rate and time of herbicide application in such systems.
Keyword Tillage
Cover Crops
Weed control
Dry seeded rice
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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Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
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Created: Mon, 08 Dec 2014, 11:31:56 EST by Bhagirath Chauhan on behalf of Centre for Plant Science