Abstract
Weed management in potato production is one of the main cost and time consuming practices. Understanding the most effective time of weed control could reduce the costs and increase potato yield. Field study was conducted in the west region of Iran during 2006 to evaluate the effect of weeds damage in potato fields. Twelve treatments used consisted of six initial weed-free periods in which plots were kept free of weeds for 0, 10, 20, 30, 40 and 50 days after crop emergence (DAE), and then weeds were allowed to grow until harvest, and six initial weed-infested periods in which, weeds were allowed to grow for 0, 10, 20, 30, 40 and 50 DAE, then the plots were kept free of weeds until harvest. Experiment was arranged as a randomized complete block design with three replications. The results showed effect of weed competition on crop dry matter started about 40 DAE and about 90 DAE reached its maximum. The weeds competition decreased dry matter accumulation, leaf area index, crop growth rate, leaf area index duration, light absorption, light extinction coefficient and radiation use efficiency (RUE) of potato. Weeds reduced the potato yield 54.8 percent. The beginning and the end of the critical period of weed control in potato (CPWC) was based on 5% and 10% tuber yield loss. The onset of the CPWC ranged from 486 to 572 GDD, at 5% and 10% yield loss level corresponding to 11 and 19 days after crop emergence, respectively. The end of the CPWC varied from 1372 to 1164 GDD, at 5% and 10% yield loss level corresponding to 65 and 51 days after crop emergence, respectively. RUE in the weed infestation treatment in comparison to the weed free treatment, reduced 11.8 percent.
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Claims 7
Claim · model-written summary
Weed competition effects on potato dry matter began near 40 days after emergence and peaked near 90 days.
- Taxon
- potato
Solanum tuberosume1 - Interactor
- weedse2weed
- Outcome
- effect of weed competition on crop dry mattere0
- Qualifier
- started about 40 DAE and about 90 DAE reached its maximume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of weed competition on crop dry matter started about 40 DAE and about 90 DAE reached its maximum”
e1“potato fields”
e2“The weeds competition decreased dry matter accumulation”
Claim · model-written summary
Weed competition decreased potato dry matter accumulation, leaf area index and crop growth rate.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- weeds competitione0
- Interactor
- weedse0weed
- Outcome
- dry matter accumulation, leaf area index, crop growth ratee0
- Direction
- decreasede0
- Comparator
- weed free treatmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weeds competition decreased dry matter accumulation, leaf area index, crop growth rate”
e1“of potato”
e2“weed free treatment”
Claim · model-written summary
Weed competition decreased potato leaf area index duration, light absorption and light extinction coefficient.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Weeds competitione0
- Interactor
- Weedse0weed
- Outcome
- leaf area index duration, light absorption, light extinction coefficiente0
- Direction
- decreasede0
- Comparator
- weed free treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weeds competition decreased dry matter accumulation, leaf area index, crop growth rate, leaf area index duration, light absorption, light extinction coefficient and radiation use efficiency (RUE) of potato”
e1“weed free treatment”
Claim · model-written summary
Weeds reduced potato yield by 54.8 percent.
- Taxon
- potatoSolanum tuberosume0
- Treatment
- Weedse0
- Interactor
- Weedse0weed
- Outcome
- potato yielde0
- Direction
- reducede0
- Value
- 54.8 percente0
- Comparator
- weed free treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weeds reduced the potato yield 54.8 percent”
e1“weed free treatment”
Claim · model-written summary
The critical weed control period began at 486 to 572 GDD, corresponding to 11 and 19 days after potato emergence for 5% and 10% yield loss.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- weedse2weed
- Outcome
- onset of the CPWCe0
- Value
- 486 to 572 GDDe0
- Qualifier
- at 5% and 10% yield loss level corresponding to 11 and 19 days after crop emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The onset of the CPWC ranged from 486 to 572 GDD, at 5% and 10% yield loss level corresponding to 11 and 19 days after crop emergence, respectively”
e1“weed control in potato”
e2“The weeds competition decreased dry matter accumulation”
Claim · model-written summary
The critical weed control period ended at 1372 to 1164 GDD, corresponding to 65 and 51 days after potato emergence for 5% and 10% yield loss.
- Taxon
- potatoSolanum tuberosume1
- Interactor
- weedse2weed
- Outcome
- end of the CPWCe0
- Value
- 1372 to 1164 GDDe0
- Qualifier
- at 5% and 10% yield loss level corresponding to 65 and 51 days after crop emergencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The end of the CPWC varied from 1372 to 1164 GDD, at 5% and 10% yield loss level corresponding to 65 and 51 days after crop emergence, respectively”
e1“weed control in potato”
e2“The weeds competition decreased dry matter accumulation”
Claim · model-written summary
Weed infestation reduced potato radiation use efficiency by 11.8 percent versus weed free treatment.
- Taxon
- potatoSolanum tuberosume1
- Treatment
- weed infestation treatmente0
- Interactor
- weedse2weed
- Outcome
- RUEe0
- Direction
- reducede0
- Value
- 11.8 percente0
- Comparator
- weed free treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“RUE in the weed infestation treatment in comparison to the weed free treatment, reduced 11.8 percent”
e1“of potato”
e2“The weeds competition decreased dry matter accumulation”
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