Abstract
The growth and yield of spring wheat (Triticum aestivum L.) were examined to determine the actual and potential yields of wheat at a site in the high rainfall zone (HRZ) of south-western Australia. Spring wheat achieved yields of 5.5-5.9 t/ha in 2001 and 2003 when subsurface waterlogging was absent or minimal. These yields were close to the estimated potential, indicating that a high yield potential is achievable. In 2002 when subsurface waterlogging occurred early in the growing season, the yield of spring wheat was 40% lower than the estimated potential. The yield of wheat was significantly correlated with the number of ears per m2 (r2 = 0.81) and dry matter at anthesis (r2 = 0.73). To achieve 5–6 t/ha of yield of wheat in the HRZ, 450–550 ears per m2 and 10–11 t/ha dry matter at anthesis should be targetted. Attaining such a level of dry matter at anthesis did not have a negative effect on dry-matter accumulation during the post-anthesis period. The harvest index (0.36-0.38) of spring wheat was comparable with that in drier parts of south-western Australia, but relatively low given the high rainfall and the long growing season. This relatively low harvest index indicates that the selected cultivar bred for the low- and medium-rainfall zone in this study, when grown in the HRZ, may have genetic limitations in sink capacity arising from the low grain number per ear. We suggest that the yield of wheat in the HRZ may be increased further by increasing the sink capacity by increasing the number of grains per ear.
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Claims 10
Claim · model-written summary
Spring wheat yielded 5.5-5.9 t/ha in 2001 and 2003, when subsurface waterlogging was absent or minimal.
- Taxon
- Spring wheat
Triticum aestivume1 - Outcome
- yieldse1
- Value
- 5.5-5.9 t/hae1
- Qualifier
- when subsurface waterlogging was absent or minimale1
- Setting
- a site in the high rainfall zone (HRZ) of south-western Australiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at a site in the high rainfall zone (HRZ) of south-western Australia”
e1“Spring wheat achieved yields of 5.5-5.9 t/ha in 2001 and 2003 when subsurface waterlogging was absent or minimal”
Claim · model-written summary
Subsurface waterlogging early in 2002 lowered spring wheat yield by 40% below the estimated potential.
- Taxon
- spring wheatTriticum aestivume2
- Treatment
- subsurface waterlogging occurred early in the growing seasone2
- Outcome
- yielde2
- Direction
- lowere2
- Value
- 40%e2
- Comparator
- estimated potentiale2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“In 2002 when subsurface waterlogging occurred early in the growing season, the yield of spring wheat was 40% lower than the estimated potential”
Claim · model-written summary
Wheat yield was significantly correlated with the number of ears per m2 (r2 = 0.81).
- Taxon
- wheatTriticum aestivume3
- Organ / stage
- earse3
- Outcome
- yielde3
- Value
- r2 = 0.81e3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The yield of wheat was significantly correlated with the number of ears per m2 (r2 = 0.81) and dry matter at anthesis (r2 = 0.73)”
Claim · model-written summary
Wheat yield was significantly correlated with dry matter at anthesis (r2 = 0.73).
- Taxon
- wheatTriticum aestivume3
- Organ / stage
- anthesise3
- Outcome
- yielde3
- Value
- r2 = 0.73e3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The yield of wheat was significantly correlated with the number of ears per m2 (r2 = 0.81) and dry matter at anthesis (r2 = 0.73)”
Claim · model-written summary
To reach 5-6 t/ha wheat yield in the high-rainfall zone, a target of 450-550 ears per m2 should be set.
- Taxon
- wheatTriticum aestivume4
- Outcome
- ears per m2e4
- Value
- 450–550e4
- Qualifier
- 5–6 t/hae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“To achieve 5–6 t/ha of yield of wheat in the HRZ, 450–550 ears per m2 and 10–11 t/ha dry matter at anthesis should be targetted”
Claim · model-written summary
To reach 5-6 t/ha wheat yield in the high-rainfall zone, a target of 10-11 t/ha dry matter at anthesis should be set.
- Taxon
- wheatTriticum aestivume4
- Outcome
- dry matter at anthesise4
- Value
- 10–11 t/hae4
- Qualifier
- 5–6 t/hae4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“To achieve 5–6 t/ha of yield of wheat in the HRZ, 450–550 ears per m2 and 10–11 t/ha dry matter at anthesis should be targetted”
Claim · model-written summary
Dry matter at anthesis at the target level did not reduce dry-matter accumulation after anthesis.
- Taxon
- wheatTriticum aestivume3
- Treatment
- Attaining such a level of dry matter at anthesise5
- Outcome
- dry-matter accumulation during the post-anthesis periode5
- Direction
- no_changeinferrede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The yield of wheat was significantly correlated with the number of ears per m2 (r2 = 0.81) and dry matter at anthesis (r2 = 0.73)”
e5“Attaining such a level of dry matter at anthesis did not have a negative effect on dry-matter accumulation during the post-anthesis period”
Claim · model-written summary
Harvest index of spring wheat (0.36-0.38) was comparable with drier parts of south-western Australia.
- Taxon
- spring wheatTriticum aestivume6
- Outcome
- harvest indexe6
- Value
- 0.36-0.38e6
- Qualifier
- comparable with that in drier parts of south-western Australiae6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The harvest index (0.36-0.38) of spring wheat was comparable with that in drier parts of south-western Australia, but relatively low given the high rainfall and the long growing season”
Claim · model-written summary
The selected cultivar bred for low- and medium-rainfall zones may have genetic limits on sink capacity from its low grain number per ear.
- Taxon
- spring wheatTriticum aestivume6
- Material
- the selected cultivar bred for the low- and medium-rainfall zonee7
- Outcome
- sink capacitye7
- Qualifier
- low grain number per eare7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The harvest index (0.36-0.38) of spring wheat was comparable with that in drier parts of south-western Australia, but relatively low given the high rainfall and the long growing season”
e7“This relatively low harvest index indicates that the selected cultivar bred for the low- and medium-rainfall zone in this study, when grown in the HRZ, may have genetic limitations in sink capacity arising from the low grain number per ear”
Claim · model-written summary
Wheat yield in the high-rainfall zone may be increased by increasing the number of grains per ear.
- Taxon
- wheatTriticum aestivume7
- Outcome
- number of grains per eare7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“We suggest that the yield of wheat in the HRZ may be increased further by increasing the sink capacity by increasing the number of grains per ear”
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