Abstract
Core Ideas A marking technique was used to monitor leaf and tiller development. The earlier a tiller is formed the more kernels it produces. Seeding rate influences tiller initiation and productivity. ABSTRACT Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.). To understand the impact management practices have on tiller initiation, a study was conducted using two seeding rates (1.9 × 10 6 vs. 6.8 × 10 6 ha −1 ) and two N timing applications (single vs. split). Tillers initiated in the fall made up the majority of spikes compared to tillers initiated from 1 January to the start of jointing (GS 30). Tillers initiated in March at either seeding rate produced very few kernels spike –1 , low kernel weight, and contributed little to yield. At the high seeding rate, tillers initiated prior to 1 January were responsible for more than 87% of the grain yield. Tillers produced in January– February produced 5 to 11% of the final yield, while tillers produced in March contributed less than 2%. In contrast, at the low seeding rate tillers produced in January–February made up 20 to almost 60% of the final yield. Overall, this study shows the timing and rate of leaf initiation impacts yield and yield components. Earlier tillers have an advantage in that they have shorter periods of leaf development that result in more leaf area which in turn supports more kernel spike –1 and heavier kernels, thus more grain weight per spike. Timing of N (single vs. split) application resulted in no significant impact on tiller development, spike number, kernel number, kernel weight, or grain yield.
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Claims 9
Claim · model-written summary
Tillers initiated in the fall made up the majority of wheat spikes.
- Taxon
- Triticum aestivum L.
Triticum aestivume0 - Outcome
- majority of spikese1
- Qualifier
- Tillers initiated in the falle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e1“Tillers initiated in the fall made up the majority of spikes compared to tillers initiated from 1 January to the start of jointing (GS 30)”
Claim · model-written summary
Tillers initiated in March produced very few kernels at either seeding rate.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Outcome
- kernelse2
- Qualifier
- at either seeding ratee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e2“Tillers initiated in March at either seeding rate produced very few kernels”
Claim · model-written summary
Tillers produced in March contributed less than 2% of the final yield.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Outcome
- contributede4
- Value
- less than 2%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e4“tillers produced in March contributed less than 2%”
Claim · model-written summary
At the high seeding rate, tillers initiated before 1 January were responsible for 87% of the grain yield.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Outcome
- grain yielde5
- Value
- 87%e5
- Qualifier
- tillers initiated prior to 1 Januarye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e5“At the high seeding rate, tillers initiated prior to 1 January were responsible for more than 87% of the grain yield”
Claim · model-written summary
Tillers produced in January to February contributed 5 to 11% of the final yield at the high seeding rate.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Outcome
- final yielde6
- Value
- 5 to 11%e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e6“produced 5 to 11% of the final yield”
Claim · model-written summary
At the low seeding rate, tillers produced in January to February made up 20 to almost 60% of the final yield.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Outcome
- final yielde6
- Value
- 20 to almost 60%e6
- Qualifier
- at the low seeding ratee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e6“made up 20 to almost 60% of the final yield”
e7“In contrast, at the low seeding rate”
Claim · model-written summary
Timing of N application (single vs. split) had no significant impact on tiller development or spike number.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Treatment
- Timing of N (single vs. split) applicatione6
- Outcome
- tiller development, spike number, kernel numbere6
- Direction
- no_changeinferrede6
- Comparator
- singlee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e6“Timing of N (single vs. split) application resulted in no significant impact on tiller development, spike number, kernel number, kernel weight, or grain yield”
Claim · model-written summary
Timing of N application (single vs. split) had no significant impact on kernel weight or grain yield.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Treatment
- Timing of N (single vs. split) applicatione6
- Outcome
- kernel weight, or grain yielde6
- Direction
- no_changeinferrede6
- Comparator
- singlee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e6“Timing of N (single vs. split) application resulted in no significant impact on tiller development, spike number, kernel number, kernel weight, or grain yield”
Claim · model-written summary
Earlier tillers give heavier kernels because their longer leaf development yields more leaf area.
- Taxon
- Triticum aestivum L.Triticum aestivume0
- Outcome
- heavier kernelse7
- Qualifier
- more leaf areae6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vegetative growth in the form of tillers is crucial to final yield in winter wheat ( Triticum aestivum L.)”
e6“result in more leaf area which in turn supports more kernel”
e7“heavier kernels, thus more grain weight per spike”