Abstract
This study was planned to determine the effects of both adequate and limited soil water supplies on grain yields of corn (Zea mays L.) during total and individual growth periods. Soil water deficits during certain growth periods were created by nonirrigation. The experiments were conducted at the Experimental Station of the Agricultural Faculty of the University of Ankara, in 1991 and 1992. The highest and the lowest grain yields were 10.85 t/ha from the plots with full irrigation and 3.47 t/ha from those without irrigation during the total growing period, respectively. Witholding irrigation during the ripening period did not affect the grain yield significantly. The greatest sensitivity to soil water deficit was at the flowering stage. Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively. The yield response factor, ky, was found to be 0.97 for the total growing period, 0.78 for the flowering, and 0.47 for the vegetative and yield formation periods. According to these results, it was concluded than corn was rather sensitive to soil water deficits and should be irrigated throughout the total growing season with the exception of the ripening period to obtain high grain yields.
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Claims 15
Claim · model-written summary
Full irrigation produced the highest grain yield of 10.85 t/ha.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- full irrigatione0
- Outcome
- grain yieldse0
- Direction
- higheste0
- Value
- 10.85 t/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest and the lowest grain yields were 10.85 t/ha from the plots with full irrigation and 3.47 t/ha from those without irrigation during the total growing period”
t0“Corn”
Claim · model-written summary
No irrigation over the total growing period produced the lowest grain yield of 3.47 t/ha.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- without irrigation during the total growing periode0
- Outcome
- grain yieldse0
- Direction
- loweste0
- Value
- 3.47 t/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest and the lowest grain yields were 10.85 t/ha from the plots with full irrigation and 3.47 t/ha from those without irrigation during the total growing period”
t0“Corn”
Claim · model-written summary
Withholding irrigation during ripening did not significantly affect grain yield.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Witholding irrigation during the ripening periode0
- Outcome
- grain yielde0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Witholding irrigation during the ripening period did not affect the grain yield significantly”
t0“Corn”
Claim · model-written summary
Corn had the greatest sensitivity to water deficit at flowering.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- flowering stagee0
- Outcome
- sensitivity to soil water deficite0
- Direction
- greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greatest sensitivity to soil water deficit was at the flowering stage”
t0“Corn”
Claim · model-written summary
Omitting irrigation during the vegetative period reduced relative grain yield by 27.9%.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- irrigation water was not applied during the vegetativee0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 27.9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
Omitting irrigation during flowering reduced relative grain yield by 25.2%.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 25.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
Omitting irrigation during yield formation reduced relative grain yield by 21.2%.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 21.2%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
Omitting irrigation during vegetative and flowering periods reduced relative grain yield by 57%.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 57%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
Omitting irrigation during vegetative and yield formation periods reduced relative grain yield by 27.9%.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 27.9%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
Omitting irrigation during flowering and yield formation periods reduced relative grain yield by 50.8%.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 50.8%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
Omitting irrigation throughout the growing period reduced relative grain yield by 68%.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Relative grain yielde0
- Direction
- reductionse0
- Value
- 68%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative grain yield reductions were found to be 27.9%, 25.2%, 21.2%, 57%, 27.9%, 50.8%, and 68% when irrigation water was not applied during the vegetative, flowering, yield formation, vegetative and flowering, vegetative and yield formation, flowering and yield formation, and total growing periods, respectively”
t0“Corn”
Claim · model-written summary
The yield response factor was 0.97 for the total growing period.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yield response factore0
- Value
- 0.97e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield response factor, ky, was found to be 0.97 for the total growing period, 0.78 for the flowering, and 0.47 for the vegetative and yield formation periods”
t0“Corn”
Claim · model-written summary
The yield response factor was 0.78 for flowering.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yield response factore0
- Value
- 0.78e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield response factor, ky, was found to be 0.97 for the total growing period, 0.78 for the flowering, and 0.47 for the vegetative and yield formation periods”
t0“Corn”
Claim · model-written summary
The yield response factor was 0.47 for vegetative and yield formation periods.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yield response factore0
- Value
- 0.47e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield response factor, ky, was found to be 0.97 for the total growing period, 0.78 for the flowering, and 0.47 for the vegetative and yield formation periods”
t0“Corn”
Claim · model-written summary
The authors recommend irrigating corn throughout the season except ripening for high yield.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- irrigated throughout the total growing season with the exception of the ripening periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn was rather sensitive to soil water deficits and should be irrigated throughout the total growing season with the exception of the ripening period to obtain high grain yields”
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