Abstract
In order to evaluate the effect of weed interference and plant density on performance of grain corn, an experiment was carried out as split-plot based on randomized completed bloke design (RCBD) with three replications at the Agriculture Research Station, University of Tabriz, Iran in 2009. Plant density levels including: 5, 7, 10 and 16 plant/m -2 was allocated to the main plots and weed interference at three levels including: weed free, once in a row weed interference and perfect weed interference were assigned to subplots. The results showed that weed interference on grain yield, 1000 seed weight, kernel weight and number of ear had a significant effect. With increasing of natural weed interference during growth period, grain yield, 1000 seed weight, kernel weight and number of ear decreased. Also, interaction between weed interference and plant density was significant in kernel weight of ear. Between different densities the greatest grain yield with 1020 g/m -2 obtained from 16 plant/m -2 and weed free treatment. Weeds in treatments of once in a row weed interference 50 percent and treatments of perfect weed interference in long of growth period 75 percent grain yield decreased. Results showed that with increasing plant density, corn can increase its competitiveness with natural weeds of field increased the grain yield. Generally, the results indicate that the sensitivity to weeds interference especially in low plant density due to the effect of early competitive start may influence extremely the yield of maize.
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Claims 9
Claim · model-written summary
Increasing natural weed interference decreased corn grain yield.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing of natural weed interference during growth period, grain yield, 1000 seed weight, kernel weight and number of ear decreased.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
Increasing natural weed interference decreased corn 1000 seed weight.
- Treatment
- natural weed interferencee0
- Interactor
- weede0weed
- Outcome
- 1000 seed weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing of natural weed interference during growth period, grain yield, 1000 seed weight, kernel weight and number of ear decreased.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
Increasing natural weed interference decreased corn kernel weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing of natural weed interference during growth period, grain yield, 1000 seed weight, kernel weight and number of ear decreased.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
Increasing natural weed interference decreased corn number of ear.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With increasing of natural weed interference during growth period, grain yield, 1000 seed weight, kernel weight and number of ear decreased.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
Weed interference and plant density interacted significantly for kernel weight of ear.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interaction between weed interference and plant density was significant in kernel weight of ear.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
The greatest grain yield, 1020 g/m -2, occurred at 16 plant/m -2 without weeds.
- Treatment
- 16 plant/m -2 and weed free treatmente0
- Outcome
- grain yielde0
- Direction
- greateste0
- Value
- 1020 g/m -2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest grain yield with 1020 g/m -2 obtained from 16 plant/m -2 and weed free treatment.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
once in a row weed interference decreased corn grain yield by 50 percent.
- Treatment
- once in a row weed interferencee0
- Interactor
- Weedse0weed
- Outcome
- grain yielde0
- Direction
- decreasede0
- Value
- 50 percente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weeds in treatments of once in a row weed interference 50 percent and treatments of perfect weed interference in long of growth period 75 percent grain yield decreased.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
perfect weed interference decreased corn grain yield by 75 percent.
- Treatment
- perfect weed interferencee0
- Interactor
- Weedse0weed
- Outcome
- grain yielde0
- Direction
- decreasede0
- Value
- 75 percente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weeds in treatments of once in a row weed interference 50 percent and treatments of perfect weed interference in long of growth period 75 percent grain yield decreased.”
t0“Grain Corn (Zea mays L.)”
Claim · model-written summary
Higher plant density increased corn competitiveness with weeds and grain yield.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- increasing plant densitye0
- Interactor
- natural weedse0weed
- Outcome
- grain yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with increasing plant density, corn can increase its competitiveness with natural weeds of field increased the grain yield.”
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