Abstract
The response of second crop corn (Zea mays L.) to 10 irrigation treatments in a semiarid climate was investigated in the field during the 2003 and 2004 growing season. Water stress was created at different development stages: early vegetative, vegetative, before tasseling, after tasseling, milk stage and after milk in order to determine the effect of irrigation treatments on vegetative growth, grain yield and yield components of corn. The effect of water stress at any stage of development on leaf area index and dry matter accumulation were studied. A rainfed (non-irrigated) treatment and 9 deficit irrigation treatments were applied to Pioneer 3394 corn hybrid on a loam soil with 3 replications. Water stress significantly affected the corn grain yield. The grain yield increased with irrigation water amount, and the highest average grain yield (11,160 kg ha -1 ) was obtained from the well/full irrigated treatment (K 1 ). Seasonal evapotranspiration increased with increased amounts of irrigation water applied. The highest seasonal ET (average of 650 mm) was determined at the (K 1 ) treatment. Water stress occurring during vegetative and tasseling stages reduced leaf area index (LAI). Total dry matter (DM) accumulation was accelerated after each irrigation application. Yield response factor (k y ) value of 1.02 was determined based on averages of two years. Significant linear relations were found for grain yield and seasonal evapotranspiration (ET). It is concluded that well irrigated treatment (K1) could be used for the semiarid climatic conditions under no water shortage. In the case of more restricted irrigation, the limitation of irrigation water at the vegetative and tasseling stages should be avoided to maintain satisfactory growth.
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Claims 11
Claim · model-written summary
Water stress significantly affected corn grain yield.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Water stresse0
- Outcome
- corn grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress significantly affected the corn grain yield.”
Claim · model-written summary
Corn grain yield increased with irrigation amount.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- irrigation water amounte0
- Outcome
- grain yielde0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield increased with irrigation water amount, and the highest average grain yield (11,160 kg ha -1 ) was obtained from the well/full irrigated treatment (K 1 ).”
t0“corn”
Claim · model-written summary
Full irrigation produced the highest average corn grain yield, 11,160 kg ha -1.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- well/full irrigated treatment (K 1 )e0
- Outcome
- average grain yielde0
- Direction
- higheste0
- Value
- 11,160 kg ha -1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest average grain yield (11,160 kg ha -1 ) was obtained from the well/full irrigated treatment (K 1 ).”
t0“corn”
Claim · model-written summary
Seasonal evapotranspiration increased with irrigation water amount.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- irrigation watere0
- Outcome
- Seasonal evapotranspiratione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seasonal evapotranspiration increased with increased amounts of irrigation water applied.”
t0“corn”
Claim · model-written summary
Full irrigation had the highest seasonal evapotranspiration, averaging 650 mm.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- (K 1 ) treatmente0
- Outcome
- seasonal ETe0
- Direction
- higheste0
- Value
- 650 mme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest seasonal ET (average of 650 mm) was determined at the (K 1 ) treatment.”
t0“corn”
Claim · model-written summary
Water stress during vegetative and tasseling stages reduced corn leaf area index.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Water stress occurring during vegetative and tasseling stagese0
- Outcome
- leaf area index (LAI)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress occurring during vegetative and tasseling stages reduced leaf area index (LAI).”
t0“corn”
Claim · model-written summary
Dry matter accumulation accelerated after each irrigation application.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- irrigation applicatione0
- Outcome
- Total dry matter (DM) accumulatione0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total dry matter (DM) accumulation was accelerated after each irrigation application.”
t0“corn”
Claim · model-written summary
The two year mean yield response factor was 1.02.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- Yield response factor (k y )e0
- Value
- 1.02e0
- Qualifier
- averages of two yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield response factor (k y ) value of 1.02 was determined based on averages of two years.”
t0“corn”
Claim · model-written summary
Grain yield and seasonal evapotranspiration had a significant linear relation.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain yielde0
- Comparator
- seasonal evapotranspiration (ET)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant linear relations were found for grain yield and seasonal evapotranspiration (ET).”
t0“corn”
Claim · model-written summary
Full irrigation could be used in semiarid conditions when water is not scarce.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- well irrigated treatment (K1)e0
- Qualifier
- semiarid climatic conditions under no water shortagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is concluded that well irrigated treatment (K1) could be used for the semiarid climatic conditions under no water shortage.”
t0“corn”
Claim · model-written summary
When irrigation is restricted, water limitation at vegetative and tasseling stages should be avoided.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- limitation of irrigation water at the vegetative and tasseling stages should be avoidede0
- Qualifier
- more restricted irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the case of more restricted irrigation, the limitation of irrigation water at the vegetative and tasseling stages should be avoided to maintain satisfactory growth.”
t0“corn”
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See all 1,016 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.