Abstract
This study was carried out in Southeastern Anatolia Region in Turkey between 2017 and 2018 to determine the effect of irrigation skipping in different phenological periods on yield and some physiological properties of corn (Zea mays L.) in second crop conditions. The trial is designed as randomized complete block design with three replications. DKC-6664 hybrid corn variety having classified as moderate maturity in the FAO (650-700) maturity classes were used in the study. Four irrigation skipping periods which are full irrigation treatments (S1, control), irrigation skipping in vegetative growth period (S2), irrigation skipping in pollination period (S3), and irrigation skipping in generative development period (S4) were studied in the research. According to the two-year averages; there were statistically significant differences in hybrid corn variety in terms of investigated characteristics. According to results, grain yield (GY), chlorophyll content (CC, spad), water use efficiency (WUE, mm), crop water stress index (CWSI) and plant water consumption (ETa, mm) were ranged from 12761.5 (S2)-14021.3 (S1) kg ha-1, 39.10 (S4)-44.50 (S1) spad, 1.902 (S1)-2.114 (S3) mm, 0.18 (S3)-0.33 (S4) and 6752 (S3)-7712.0 (S1) mm respectively. Because of drier weather conditions in 2017 compared to 2018, while GY, CC, and WUE parameters decreased, CWSI and ETa parameters increased. In the first year of the trial when dry weather conditions prevailed, the corn variety consumed more water and was more stressed. As a result, yield losses were experienced. There were positive and significant correlations between GY and CC and WUE, and negative and significant correlations between CWSI. The results of the study indicated that irrigation should not be skipped during the entire vegetative period for economical and profitable corn production in semi-arid regions.
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Claims 10
Claim · model-written summary
Grain yield ranged from 12761.5 under S2 to 14021.3 kg ha-1 under S1.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- irrigation skipping in vegetative growth period (S2)e2
- Outcome
- grain yielde0
- Direction
- lowerinferrede0
- Value
- 12761.5 (S2)-14021.3 (S1) kg ha-1e0
- Comparator
- full irrigation treatments (S1, control)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield (GY), chlorophyll content (CC, spad), water use efficiency (WUE, mm), crop water stress index (CWSI) and plant water consumption (ETa, mm) were ranged from 12761.5 (S2)-14021.3 (S1) kg ha-1”
e1“of corn (Zea mays L.)”
e2“irrigation skipping in vegetative growth period (S2)”
e3“full irrigation treatments (S1, control)”
Claim · model-written summary
Chlorophyll content ranged from 39.10 under S4 to 44.50 spad under S1.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- irrigation skipping in generative development period (S4)e3
- Outcome
- chlorophyll contente1
- Direction
- lowerinferrede0
- Value
- 39.10 (S4)-44.50 (S1) spade0
- Comparator
- full irrigation treatments (S1, control)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“39.10 (S4)-44.50 (S1) spad”
e1“chlorophyll content (CC, spad)”
e2“of corn (Zea mays L.)”
e3“irrigation skipping in generative development period (S4)”
e4“full irrigation treatments (S1, control)”
Claim · model-written summary
Water-use efficiency ranged from 1.902 under S1 to 2.114 mm under S3.
- Taxon
- cornZea mays subsp. mayse2
- Treatment
- irrigation skipping in pollination period (S3)e3
- Outcome
- water use efficiencye1
- Direction
- higherinferrede0
- Value
- 1.902 (S1)-2.114 (S3) mme0
- Comparator
- full irrigation treatments (S1, control)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1.902 (S1)-2.114 (S3) mm”
e1“water use efficiency (WUE, mm)”
e2“of corn (Zea mays L.)”
e3“irrigation skipping in pollination period (S3)”
e4“full irrigation treatments (S1, control)”
Claim · model-written summary
Crop water stress index ranged from 0.18 under S3 to 0.33 under S4.
- Taxon
- cornZea mays subsp. mayse2
- Outcome
- crop water stress indexe0
- Direction
- higherinferrede1
- Value
- 0.18 (S3)-0.33 (S4)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crop water stress index (CWSI)”
e1“0.18 (S3)-0.33 (S4)”
e2“of corn (Zea mays L.)”
Claim · model-written summary
Plant water consumption ranged from 6752 under S3 to 7712.0 mm under S1.
- Taxon
- cornZea mays subsp. mayse2
- Outcome
- plant water consumptione0
- Direction
- higherinferrede1
- Value
- 6752 (S3)-7712.0 (S1) mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant water consumption (ETa, mm)”
e1“6752 (S3)-7712.0 (S1) mm”
e2“of corn (Zea mays L.)”
Claim · model-written summary
Drier 2017 conditions decreased grain yield, chlorophyll content and water-use efficiency relative to 2018.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- GY, CC, and WUE parameterse0
- Direction
- decreasede0
- Comparator
- 2018e0
- Setting
- 2017e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Because of drier weather conditions in 2017 compared to 2018, while GY, CC, and WUE parameters decreased”
e1“of corn (Zea mays L.)”
Claim · model-written summary
Drier 2017 conditions increased CWSI and ETa relative to 2018.
- Taxon
- cornZea mays subsp. mayse2
- Outcome
- CWSI and ETa parameterse0
- Direction
- increasede0
- Comparator
- 2018e1
- Setting
- 2017e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CWSI and ETa parameters increased.”
e1“Because of drier weather conditions in 2017 compared to 2018”
e2“of corn (Zea mays L.)”
Claim · model-written summary
Grain yield correlated positively and significantly with chlorophyll content and water-use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- GYe0
- Direction
- positivee0
- Qualifier
- CC and WUEe0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were positive and significant correlations between GY and CC and WUE”
e1“of corn (Zea mays L.)”
Claim · model-written summary
Grain yield correlated negatively and significantly with crop water stress index.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative and significant correlations between CWSI”
e1“There were positive and significant correlations between GY and CC and WUE, and negative and significant correlations between CWSI.”
e2“of corn (Zea mays L.)”
Claim · model-written summary
The authors recommend against skipping irrigation through the vegetative period for profitable corn production.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- irrigation should not be skipped during the entire vegetative periode0
- Setting
- semi-arid regionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation should not be skipped during the entire vegetative period for economical and profitable corn production in semi-arid regions.”
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