Abstract
Abstract Deficit irrigation (DI) could be an important strategy to achieve the goal of reducing irrigation water consumption. This review aims to identify the impact of different DI strategies on grain yield, water use efficiency (WUE) and oil and protein content in soybean seeds. A total of 25 articles were considered and then divided into DI throughout the whole cycle (standard deficit irrigation, StDI) and DI only at certain stages of the cycle (regulated deficit irrigation, RDI). In StDI, yield reductions were approximately 20% when the replacement of the crop water requirement was between 70% and 90%. For RDI, yield reductions ranging from 9% to 30% were observed depending on the phenological stage at which the crop evapotranspiration (ET c ) deficit was imposed. StDI always increased WUE compared to full irrigation, whereas for RDI, the response in terms of WUE changed considering the stressed phenological stage. Few studies have reported the effects on oil and protein content, showing high variability and contrasting results. In general, the application of a reduced amount of water led to a decrease in yield and an increase in WUE, with a magnitude significantly influenced by the stage at which the stress was imposed.
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Claims 6
Claim · model-written summary
Standard deficit irrigation reduced soybean yield by about 20% when the crop water requirement replacement was 70% to 90%
- Taxon
- soybean
Glycine maxt0 - Treatment
- StDIe1
- Outcome
- yielde1
- Direction
- reductionse1
- Value
- approximately 20%e1
- Qualifier
- when the replacement of the crop water requirement was between 70% and 90%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“deficit irrigation in soybean”
e1“In StDI, yield reductions were approximately 20% when the replacement of the crop water requirement was between 70% and 90%”
Claim · model-written summary
Regulated deficit irrigation reduced soybean yield by 9% to 30% depending on the phenological stage
- Taxon
- soybeanGlycine maxt0
- Treatment
- RDIe2
- Outcome
- yielde2
- Direction
- reductionse2
- Value
- 9% to 30%e2
- Qualifier
- depending on the phenological stagee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“deficit irrigation in soybean”
e2“For RDI, yield reductions ranging from 9% to 30% were observed depending on the phenological stage”
Claim · model-written summary
Standard deficit irrigation always increased soybean WUE compared with full irrigation
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“deficit irrigation in soybean”
e3“StDI always increased WUE compared to full irrigation”
Claim · model-written summary
The WUE response to regulated deficit irrigation changed with the stressed phenological stage in soybean
- Taxon
- soybeanGlycine maxt0
- Treatment
- RDIe4
- Outcome
- response in terms of WUEe4
- Qualifier
- considering the stressed phenological stagee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“deficit irrigation in soybean”
e4“For RDI, the response in terms of WUE changed considering the stressed phenological stage”
Claim · model-written summary
Effects of deficit irrigation on soybean oil and protein content were highly variable and contrasting
- Taxon
- soybeanGlycine maxt0
- Outcome
- oil and protein contente5
- Qualifier
- high variability and contrasting resultse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“deficit irrigation in soybean”
e5“Few studies have reported the effects on oil and protein content, showing high variability and contrasting results”
Claim · model-written summary
The magnitude of the yield decrease and WUE increase under deficit irrigation depended on the stage at which stress was imposed
- Taxon
- soybeanGlycine maxt0
- Outcome
- magnitudee6
- Qualifier
- significantly influenced by the stage at which the stress was imposede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“deficit irrigation in soybean”
e6“with a magnitude significantly influenced by the stage at which the stress was imposed”