Abstract
Abstract With the ongoing global warming, the occurrence and amplitude of extreme weather events have increased over the West African Sahel. The increasing frequency of heavy rain events, can negatively affect the lowland crops’ growth and production. Two-season field experiments were conducted near Ouagadougou (Burkina Faso) to test the effects of temporary flooding and surface water stagnation on maize ( Zea mays L. ) growth and productivity. The treatments were organized into a split-split plot design. Three factors were monitored, including aboveground flooding levels (i.e., 0 cm, 2–3 cm, and 7–8 cm), flooding duration (i.e., three days and six days), and growth stages (i.e., six-leaf stage (V6), tasseling stage (VT) and milky stage (R3)). Optimal crop management was practiced to Obatanpa cultivar planted during the rainy season and flooding was induced by over-irrigation. The results show that three days and six days of flooding, reduced grain yield by at least 35% when they occurred at the tasseling stage. Only 4–6 days of flooding reduced grain yield by 21% at the six-leaf stage. Further scrutiny, using the stress day index (SDI), revealed that the penalty on yield increases exponentially under flooding conditions as the value of the stress day index increases. Considering the new characteristics of the rainfall regime in the West African Sahel, dominated by a high frequency of heavy rain events and wet spells, temporary floods, and water stagnation are tremendously contributing to yield loss of on-farm maize. As the region’s climate changes, we hypothesize that excess water stress will become the next cause of food insecurity in the area.
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Claims 3
Claim · model-written summary
Three and six days of flooding at tasseling reduced maize grain yield by at least 35%.
- Organ / stage
- tasseling stagee0
- Treatment
- three days and six days of floodinge0
- Outcome
- grain yielde0
- Direction
- reducede0
- Value
- at least 35%e0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three days and six days of flooding, reduced grain yield by at least 35% when they occurred at the tasseling stage”
t0“Maize”
Claim · model-written summary
Four to six days of flooding at the six-leaf stage reduced grain yield by 21%.
- Organ / stage
- six-leaf stagee0
- Treatment
- 4–6 days of floodinge0
- Outcome
- grain yielde0
- Direction
- reducede0
- Value
- 21%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only 4–6 days of flooding reduced grain yield by 21% at the six-leaf stage”
t0“Maize”
Claim · model-written summary
Under flooding, yield penalty increased exponentially with stress day index.
- Treatment
- flooding conditionse0
- Outcome
- penalty on yielde0
- Direction
- increasese0
- Qualifier
- as the value of the stress day index increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the penalty on yield increases exponentially under flooding conditions as the value of the stress day index increases”
t0“Maize”
The same questions in other papers
flooding · yield · Zea mays (maize)Positive and negative results
49 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
52 papers more in this group
See all 56 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.