Abstract
Moisture stress is an important factor affecting field-grown maize in the tropics, especially in the minor dry seasons, and irrigation is required for successful crop growth and yields. Field experiments evaluated the impact of four irrigation regimes ranging from 3 to 21-day intervals on growth of maize (Zea mays L.) roots and shoots at critical stages and on seed yields when compared to those of irrigated maize plants in two minor seasons at Sri Lanka. While surface wetting at planting induced germination in all treatments, growth of seminal and first-order lateral roots was enhanced by increasing irrigation intervals. Relative water contents were similar at irrigation intervals of 3, 7 and 14 days and declined thereafter. At anthesis, root length and weight densities indicated the greater penetration into soil layers with increasing intervals of water supply. The highest yields were at 7 and 14-day irrigation intervals thus illustrating that regular water supply in minor dry seasons may be detrimental for maize growth and yields.
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Claims 4
Claim · model-written summary
Longer irrigation intervals enhanced growth of seminal and first-order lateral roots of maize compared with irrigated plants.
- Treatment
- ranging from 3 to 21-day intervalse0
- Outcome
- growth of seminal and first-order lateral rootse1
- Direction
- enhancede1
- Comparator
- irrigated maize plantse5
- Setting
- Sri Lankae5
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field experiments evaluated the impact of four irrigation regimes ranging from 3 to 21-day intervals on growth of maize (Zea mays L.) roots and shoots”
e1“growth of seminal and first-order lateral roots was enhanced by increasing irrigation intervals”
e5“when compared to those of irrigated maize plants in two minor seasons at Sri Lanka”
Claim · model-written summary
The highest maize seed yields occurred at 7 and 14-day irrigation intervals.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field experiments evaluated the impact of four irrigation regimes ranging from 3 to 21-day intervals on growth of maize (Zea mays L.) roots and shoots”
e2“The highest yields were at 7 and 14-day irrigation intervals”
Claim · model-written summary
Relative water contents of maize were similar at 3, 7 and 14-day irrigation intervals and declined thereafter.
- Treatment
- irrigation intervals of 3, 7 and 14 dayse3
- Outcome
- Relative water contentse3
- Direction
- similare3
- Qualifier
- declined thereaftere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field experiments evaluated the impact of four irrigation regimes ranging from 3 to 21-day intervals on growth of maize (Zea mays L.) roots and shoots”
e3“Relative water contents were similar at irrigation intervals of 3, 7 and 14 days and declined thereafter”
Claim · model-written summary
Increasing irrigation intervals was associated with greater penetration of maize roots into soil layers at anthesis.
- Treatment
- increasing intervals of water supplye4
- Outcome
- penetration into soil layerse4
- Direction
- greatere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Field experiments evaluated the impact of four irrigation regimes ranging from 3 to 21-day intervals on growth of maize (Zea mays L.) roots and shoots”
e4“At anthesis, root length and weight densities indicated the greater penetration into soil layers with increasing intervals of water supply”
The same questions in other papers
irrigation · yield · Zea mays (maize)Positive and negative results
790 papers in the same direction as this paper · 209 in the opposite direction · 16 reporting no difference from an alternative
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- negative
- positive
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