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| DOI: | 10.1017/wsc.2017.17 |
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| Web URL(s): | http://www.bioone.org/doi/full/10.1017/wsc.2017.17
Last checked: 10/04/2017
Access conditions: Item is within a limited-access website
http://www.bioone.org/doi/pdf/10.1017/wsc.2017.17
Last checked: 10/04/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Yasin, Muhammad;
Rosenqvist, Eva;
Andreasen, Christian |
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| Author Affiliation: | Yasin: Ph.D. Student, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark, and Lecturer, Department of Agronomy, University College of Agriculture, University of Sargodha, Sargodha, Pakistan; Rosenqvist and Andreasen: Associate Professor, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark |
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| Title: | The effect of reduced light intensity on grass weeds |
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| Section: | Weed biology and ecology
Other records with the "Weed biology and ecology" Section
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| Source: | Weed Science. Vol. 65, No. 5, September/October 2017, p. 603-613. |
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| Publishing Information: | Champaign, Illinois: Weed Science Society of America |
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| # of Pages: | 11 |
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| Related Web URL: | http://www.bioone.org/doi/abs/10.1017/wsc.2017.17
Last checked: 10/04/2017
Notes: Abstract only |
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| Keywords: | TIC Keywords: Alopecurus myosuroides; Daily light integral; Growth studies; Light intensity; Poa annua; Weeds
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| Abstract/Contents: | "The effect of reduced light intensity on the growth and development of three common grass weeds, blackgrass, silky windgrass, and annual bluegrass, was studied. Two identical greenhouse experiments displaced in time were performed with six light levels aiming at 0%, 20%, 50%, 80%, 90%, and 95% shade corresponding to a mean daily light integral (DLI) of 12.4, 9.63, 7.13, 2.74, 0.95, and 0.69 mol m-2 d-1 in experiment 1 and 21.2, 18.0, 10.7, 3.71, 1.64, 1.20 mol m-2 d-1 in experiment 2. Climate screens of acrylic fabric were used to create the light levels. A DLI of 0.69 to 3.71 mol m-2 d-1 substantially reduced the plant height, the number of leaves, leaf chlorophyll content index, stomatal conductance, maximum photochemical efficiency of photosystem II, and dry matter of blackgrass. It also reduced plant height, the number of leaves, and dry matter and delayed flowering of windgrass and annual bluegrass. Annual bluegrass reacted most rapidly when light levels increased from the lowest levels by producing more leaves. DLI thresholds for blooming were estimated to be about 7.13 mol m-2 d-1 for windgrass and 1.64 mol m-2 d-1 for annual bluegrass. Annual bluegrass was able to bloom and sustain biomass even at a DLI of 1.64 mol m-2 d-1. This ability may contribute to an explanation of why annual bluegrass is among the most common weed species in highly competitive and well-fertilized crops even though it is much smaller than the two other grass species." |
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| Language: | English |
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| References: | 34 |
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| Note: | Pictures, color
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Yasin, M., E. Rosenqvist, and C. Andreasen. 2017. The effect of reduced light intensity on grass weeds. Weed Sci. 65(5):p. 603-613. |
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| DOI: 10.1017/wsc.2017.17 |
| Web URL(s):
http://www.bioone.org/doi/full/10.1017/wsc.2017.17
Last checked: 10/04/2017
Access conditions: Item is within a limited-access website
http://www.bioone.org/doi/pdf/10.1017/wsc.2017.17
Last checked: 10/04/2017
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: b2203399a |
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