Abstract
Water stress is intrinsically related to soil water availability which is determinant in gas exchanges, as well as soil compaction in soybean growth and development. This study aimed to evaluate the leaf gas exchange, water stress index, and dry mass accumulation of soybean cultivated in different daily irrigation depths and bulk density. The treatments were distributed in pots subdivided in a 4×4 factorial scheme: four levels of bulk density of the soil (1.0, 1.15, 1.30 and 1.45 g cm-3) and four daily irrigation depths (4.0, 5.0, 6.0- and 7.0-mm day-1), with three replications. Physiological and morphological variables were analyzed. There were low transpiration rates due to water deficit in the 4 mm daily irrigation depth that resulted in stomatal closure and impaired the performance of the photosynthetic process in soybean. The increase in soil density provided gains in shoot and dry root mass in the layer above the compacted one. Low availability of water in the soil reduces the photosynthesis and growth of soybean plants. Increase in bulk density of the soil promotes greater root development, with the layer above the compacted being the one that concentrates most of the roots.
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Claims 8
Claim · model-written summary
At 4 mm daily irrigation, water deficit lowered soybean transpiration.
- Taxon
- soybean
Glycine maxt0 - Treatment
- water deficit in the 4 mm daily irrigation depthe0
- Outcome
- transpiration ratese0
- Direction
- lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were low transpiration rates due to water deficit in the 4 mm daily irrigation depth”
t0“soybean”
Claim · model-written summary
Water deficit at 4 mm daily irrigation resulted in stomatal closure in soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- water deficit in the 4 mm daily irrigation depthe0
- Outcome
- stomatal closuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water deficit in the 4 mm daily irrigation depth that resulted in stomatal closure”
t0“soybean”
Claim · model-written summary
Water deficit at 4 mm daily irrigation impaired soybean photosynthesis.
- Taxon
- soybeanGlycine maxe0
- Treatment
- water deficit in the 4 mm daily irrigation depthe0
- Outcome
- performance of the photosynthetic processe0
- Direction
- impairede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water deficit in the 4 mm daily irrigation depth that resulted in stomatal closure and impaired the performance of the photosynthetic process in soybean”
Claim · model-written summary
Increasing soil density increased soybean shoot dry mass above the compacted layer.
- Taxon
- soybeanGlycine maxt0
- Treatment
- increase in soil densitye0
- Outcome
- shoote0
- Direction
- gainse0
- Qualifier
- in the layer above the compacted onee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in soil density provided gains in shoot and dry root mass in the layer above the compacted one”
t0“soybean”
Claim · model-written summary
Increasing soil density increased soybean dry root mass above the compacted layer.
- Taxon
- soybeanGlycine maxt0
- Treatment
- increase in soil densitye0
- Outcome
- dry root masse0
- Direction
- gainse0
- Qualifier
- in the layer above the compacted onee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in soil density provided gains in shoot and dry root mass in the layer above the compacted one”
t0“soybean”
Claim · model-written summary
Low soil water availability reduced soybean growth.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Low availability of water in the soile0
- Outcome
- growthe0
- Direction
- reducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low availability of water in the soil reduces the photosynthesis and growth of soybean plants”
Claim · model-written summary
Higher soil bulk density promoted soybean root development.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Increase in bulk density of the soile0
- Outcome
- root developmente0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in bulk density of the soil promotes greater root development”
t0“soybean”
Claim · model-written summary
Most soybean roots were concentrated in the layer above the compacted layer.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- rootse0
- Outcome
- concentrates most of the rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the layer above the compacted being the one that concentrates most of the roots”
t0“soybean”
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