Abstract
Irrigation water supplies are decreasing in many areas of the Ethiopian regions, which is requiring many farmers to consider deficit-irrigating soybean (Glycine max L.). This study investigated the response of soybean (Glycine max L.) to moisture deficit under conventional, alternate and fixed furrow irrigation system over a three years period. A field experiment was conducted at Jimma Agricultural Research. A randomized complete block design (RCBD) with three replications was used. nine treatments which combined and imposed at all growth stages were used. The three years combined result indicated that there were a highly significant (P<0.01) variation among treatments for grain yield, above ground dry biomass yield and water productivity. The grain yield of soybean was significantly (P<0.01) affected due to moisture stress imposed at different growth stages. Accordingly, the highest grain yield was obtained from conventional furrow 100% ETc irrigating all growth stage treatment followed by conventional furrow 75% ETc and alternate furrow 100% ETc. The highest water productivity of 1.23 kg m-3 was obtained from alternate irrigation system at 50 ETc but the yield loss is not tolerable. Alternate furrow 100% ETc and conventional furrow 50% ETc gave a better yield with high water productivity. Therefore, for better water productivity without a significant yield loss, it is recommended to use alternate furrow irrigation with 100% ETc and conventional furrow irrigation 50% ETc. In addition, if the water resource is not scarce in the area, it is recommended to use conventional furrow irrigation with 100% ETc throughout the whole growth stage to obtain optimum yield. Keywords: Water productivity, Deficit irrigation, ETc, Furrow irrigation system, Soybean
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Claims 9
Claim · model-written summary
Treatments differed significantly in soybean grain yield.
- Taxon
- soybean
Glycine maxe1 - Treatment
- treatmentse0
- Outcome
- grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highly significant (P<0.01) variation among treatments for grain yield”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Treatments differed significantly in above-ground dry biomass yield.
- Taxon
- soybeanGlycine maxe1
- Treatment
- treatmentse0
- Outcome
- above ground dry biomass yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highly significant (P<0.01) variation among treatments for grain yield, above ground dry biomass yield and water productivity”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Treatments differed significantly in water productivity.
- Taxon
- soybeanGlycine maxe1
- Treatment
- treatmentse0
- Outcome
- water productivitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highly significant (P<0.01) variation among treatments for grain yield, above ground dry biomass yield and water productivity”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Moisture stress at different growth stages significantly affected soybean grain yield.
- Taxon
- soybeanGlycine maxe0
- Treatment
- moisture stresse0
- Outcome
- grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The grain yield of soybean was significantly (P<0.01) affected due to moisture stress imposed at different growth stages”
Claim · model-written summary
Conventional furrow irrigation at 100% ETc throughout growth gave the highest grain yield.
- Taxon
- soybeanGlycine maxe1
- Treatment
- conventional furrow 100% ETc irrigating all growth stage treatmente0
- Outcome
- grain yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest grain yield was obtained from conventional furrow 100% ETc irrigating all growth stage treatment”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Alternate irrigation at 50 ETc gave the highest water productivity, 1.23 kg m-3, but intolerable yield loss.
- Taxon
- soybeanGlycine maxe1
- Treatment
- alternate irrigation system at 50 ETce0
- Outcome
- water productivitye0
- Direction
- higheste0
- Value
- 1.23 kg m-3e0
- Qualifier
- yield loss is not tolerablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest water productivity of 1.23 kg m-3 was obtained from alternate irrigation system at 50 ETc but the yield loss is not tolerable”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Alternate furrow 100% ETc gave better yield with high water productivity.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Alternate furrow 100% ETce0
- Outcome
- yield with high water productivitye0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alternate furrow 100% ETc and conventional furrow 50% ETc gave a better yield with high water productivity”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Conventional furrow 50% ETc gave better yield with high water productivity.
- Taxon
- soybeanGlycine maxe1
- Treatment
- conventional furrow 50% ETce0
- Outcome
- yield with high water productivitye0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alternate furrow 100% ETc and conventional furrow 50% ETc gave a better yield with high water productivity”
e1“deficit-irrigating soybean (Glycine max L.)”
Claim · model-written summary
Where water is not scarce, the authors recommend conventional furrow irrigation at 100% ETc throughout growth for optimum yield.
- Taxon
- soybeanGlycine maxe1
- Outcome
- conventional furrow irrigation with 100% ETc throughout the whole growth stagee0
- Qualifier
- if the water resource is not scarce in the areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“if the water resource is not scarce in the area, it is recommended to use conventional furrow irrigation with 100% ETc throughout the whole growth stage to obtain optimum yield”
e1“deficit-irrigating soybean (Glycine max L.)”
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