Seed bank dynamics and emergence pattern of weeds as affected by tillage systems in dry direct-seeded rice

-Singh, Manpreet, Bhullar, Makhan S. and Chauhan, Bhagirath S. (2015) Seed bank dynamics and emergence pattern of weeds as affected by tillage systems in dry direct-seeded rice. Crop Protection, 67 168-177. doi:10.1016/j.cropro.2014.10.015


Author -Singh, Manpreet
Bhullar, Makhan S.
Chauhan, Bhagirath S.
Title Seed bank dynamics and emergence pattern of weeds as affected by tillage systems in dry direct-seeded rice
Journal name Crop Protection   Check publisher's open access policy
ISSN 0261-2194
1873-6904
Publication date 2015-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.cropro.2014.10.015
Open Access Status
Volume 67
Start page 168
End page 177
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Formatted abstract
The vertical weed seed distribution in the soil and the emergence pattern of weeds have implications for weed management in different cropping systems. Various agronomic practices have been reported to influence these factors, and tillage has a great role to play in weed management strategies. The effect of conventional tillage (CONT) and zero tillage (ZT) on the distribution of weed seeds in the soil, and the emergence pattern of different weed species was evaluated in dry direct-seeded rice in the summer (kharif) seasons of 2012 and 2013. The ZT system resulted in a higher proportion of weed seeds in 0–2 cm of the soil layer at the time of crop sowing, with 48–52% of broadleaved and 45–55% of grassy weed seeds; whereas, CONT had weed seeds buried in deeper layers, with 47–48% of broadleaved and 50–55% of grassy weed seeds in the lowermost layer (5–10 cm). At crop harvest, both tillage systems showed higher proportions of weed seeds in the upper 2 cm of the soil layer; however, this was due to seed shedding of mature weeds on the soil surface. The maximum emergence of Cyperus rotundus and Echinochloa colona was 33–42% and 20–26% higher in ZT than CONT. In 2012, Cyperus compressus emergence in ZT exceeded CONT by 65%, whereas Echinochloa crus-galli and Dactyloctenium aegyptium emerged 22% and 52% more in the CONT system than ZT. The emergence pattern of Digitaria ciliaris was not influenced by tillage systems. The information from this study will facilitate better decision making in weed management through the integration of tillage systems and other weed control measures in dry direct-seeded rice.
Keyword Zero tillage
Conventional tillage
Weed seed bank
Weed emergence
Direct-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 2015 Collection
 
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Created: Thu, 06 Nov 2014, 10:20:10 EST by Bhagirath Chauhan on behalf of Centre for Plant Science