Abstract
The aim of the study was to determine the response of soybean [Glycine max (L.) Merr.] to drought at various stages of development in a sub-humid environment of Turkey. Drought-stress treatments was applied to plants in 2005 and 2006 by withholding irrigation at six critical stages: completely vegetative (fifth trifoliate) (T2), flowering (T3), podding (T4), seed fill (T5), full bloom + podding (T6), and podding + seed fill (T7). Growth and production was compared in each treatment to full irrigated (T1) and nonirrigated (T8) controls. Each drought treatment reduced shoot biomass and seed yield compared to wellwatered plants, but only non-irrigated plants or plants droughted at vegetative or flowering stages produced fewer seed pods and seeds. Seed protein and oil content was highest among treatments when plants were droughted during the seed filling stage. Yield increased exponentially with crop water use and ranged from 2.1 - 2.5 tons ha -1 in non-irrigated plants to 3.5 - 4.0 tons ha -1 in the well-watered controls. However, plants droughted during the vegetative stage of development produced the highest yield per unit of irrigation water applied (that is, irrigation water use efficiency). This research results will be useful for maximizing soybean production and/or seed quality when irrigation water is limited.
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Claims 10
Claim · model-written summary
Every drought treatment reduced soybean shoot biomass relative to well-watered plants.
- Taxon
- soybean
Glycine maxt0 - Treatment
- drought treatmente0
- Outcome
- shoot biomasse0
- Direction
- reducede0
- Comparator
- wellwatered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each drought treatment reduced shoot biomass and seed yield compared to wellwatered plants”
t0“soybean”
Claim · model-written summary
Every drought treatment reduced soybean seed yield relative to well-watered plants.
- Taxon
- soybeanGlycine maxt0
- Treatment
- drought treatmente0
- Outcome
- seed yielde0
- Direction
- reducede0
- Comparator
- wellwatered plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Each drought treatment reduced shoot biomass and seed yield compared to wellwatered plants”
t0“soybean”
Claim · model-written summary
Non-irrigation or drought at vegetative or flowering stages reduced soybean seed pod number.
- Taxon
- soybeanGlycine maxt0
- Treatment
- non-irrigated plants or plants droughted at vegetative or flowering stagese0
- Outcome
- seed podse0
- Direction
- fewere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only non-irrigated plants or plants droughted at vegetative or flowering stages produced fewer seed pods and seeds”
t0“soybean”
Claim · model-written summary
Non-irrigation or drought at vegetative or flowering stages reduced soybean seed number.
- Taxon
- soybeanGlycine maxt0
- Treatment
- non-irrigated plants or plants droughted at vegetative or flowering stagese0
- Outcome
- seedse0
- Direction
- fewere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only non-irrigated plants or plants droughted at vegetative or flowering stages produced fewer seed pods and seeds”
t0“soybean”
Claim · model-written summary
Seed protein content was highest when soybean was droughted during seed filling.
- Taxon
- soybeanGlycine maxt0
- Treatment
- droughted during the seed filling stagee0
- Outcome
- Seed proteine0
- Direction
- higheste0
- Comparator
- treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed protein and oil content was highest among treatments when plants were droughted during the seed filling stage”
t0“soybean”
Claim · model-written summary
Seed oil content was highest when soybean was droughted during seed filling.
- Taxon
- soybeanGlycine maxt0
- Treatment
- droughted during the seed filling stagee0
- Outcome
- oil contente0
- Direction
- higheste0
- Comparator
- treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed protein and oil content was highest among treatments when plants were droughted during the seed filling stage”
t0“soybean”
Claim · model-written summary
Soybean yield rose exponentially with crop water use.
- Taxon
- soybeanGlycine maxt0
- Outcome
- Yielde0
- Direction
- increasede0
- Qualifier
- crop water usee0
Not reportedOrgan / stageTreatmentSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield increased exponentially with crop water use”
t0“soybean”
Claim · model-written summary
Non-irrigated soybean yielded 2.1 - 2.5 tons ha -1.
- Taxon
- soybeanGlycine maxt0
- Outcome
- non-irrigated plantse0
- Value
- 2.1 - 2.5 tons ha -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2.1 - 2.5 tons ha -1 in non-irrigated plants”
t0“soybean”
Claim · model-written summary
Well-watered soybean controls yielded 3.5 - 4.0 tons ha -1.
- Taxon
- soybeanGlycine maxt0
- Outcome
- well-watered controlse0
- Value
- 3.5 - 4.0 tons ha -1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“3.5 - 4.0 tons ha -1 in the well-watered controls”
t0“soybean”
Claim · model-written summary
Vegetative-stage drought gave the highest soybean irrigation water use efficiency.
- Taxon
- soybeanGlycine maxt0
- Treatment
- droughted during the vegetative stage of developmente0
- Outcome
- irrigation water use efficiencye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants droughted during the vegetative stage of development produced the highest yield per unit of irrigation water applied (that is, irrigation water use efficiency)”
t0“soybean”
The same questions in other papers
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See all 214 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.