Abstract
Core Ideas Seeding rate is important for measuring phyllochron interval and maximum number leaf. As seeding rate increases, phyllochron interval increases; as seeding rate increases, maximum leaf number decreases. High seeding rate led to an increase in tiller production per m 2 compared with low seeding rate. Neither seeding rate nor N application timing increased tiller viability. Vegetative growth in the form of tillers is crucial in development of wheat ( Triticum aestivum L). To better understand wheat development and tiller initiation, a study was conducted using two seeding rates (193 vs. 676 m −2 ) and two N application timings (single vs. split). Using a detailed marking technique to track leaf and tiller growth, tillers plant −1 , rate of leaf appearance tiller −1 , phyllochron interval (PI), accumulated heat units, and maximum leaf number (MLN) were measured. Although the timing of tiller initiation did not differ among the two seeding rates, results showed that at the low seeding rate (LSR) the frequency of leaf appearance on each tiller was increased, resulting in tillers having more leaves at decimal growth stage (DGS) 30. At the high seeding rate (HSR), leaf appearance among tillers was reduced, resulting in only fall tillers having enough leaf area to sustain growth from DGS 30 to harvest. The MLN was significantly greater at the LSR compared with the HSR. The MLN for the main stem was greater than those found on Tiller 1, and MLN for Tiller 1 was greater than those found on Tiller 2. There were no significant interactions or main effects involving the timing of N. It is difficult to determine the role that N application timing has on tiller and leaf development since there was not a consistent effect of N timing on PI and no effects of N timing on MLN.
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Claims 15
Claim · model-written summary
Higher seeding rate increased phyllochron interval.
- Taxon
- Winter Wheat
Triticum aestivumt0 - Treatment
- seeding ratee0
- Outcome
- phyllochron intervale0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as seeding rate increases, phyllochron interval increases”
t0“Winter Wheat”
Claim · model-written summary
Higher seeding rate decreased maximum leaf number.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- seeding ratee0
- Outcome
- maximum leaf numbere0
- Direction
- decreasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as seeding rate increases, maximum leaf number decreases”
t0“Winter Wheat”
Claim · model-written summary
High seeding rate increased tiller production per square meter.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- High seeding ratee0
- Outcome
- tiller production per m 2e0
- Direction
- increasee0
- Comparator
- low seeding ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High seeding rate led to an increase in tiller production per m 2 compared with low seeding rate.”
t0“Winter Wheat”
Claim · model-written summary
Seeding rate did not increase tiller viability.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- seeding ratee0
- Outcome
- tiller viabilitye0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither seeding rate nor N application timing increased tiller viability.”
t0“Winter Wheat”
Claim · model-written summary
Nitrogen application timing did not increase tiller viability.
- Taxon
- Winter WheatTriticum aestivumt0
- Treatment
- N application timinge0
- Outcome
- tiller viabilitye0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither seeding rate nor N application timing increased tiller viability.”
t0“Winter Wheat”
Claim · model-written summary
Tiller initiation timing did not differ between seeding rates.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- two seeding ratese0
- Outcome
- timing of tiller initiatione0
- Direction
- did not differe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the timing of tiller initiation did not differ among the two seeding rates”
t0“Winter Wheat”
Claim · model-written summary
Low seeding rate increased leaf appearance frequency per tiller.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- low seeding rate (LSR)e0
- Outcome
- frequency of leaf appearance on each tillere0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the low seeding rate (LSR) the frequency of leaf appearance on each tiller was increased”
t0“Winter Wheat”
Claim · model-written summary
Low seeding rate resulted in more leaves on tillers at growth stage 30.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- decimal growth stage (DGS) 30e0
- Treatment
- low seeding rate (LSR)e0
- Outcome
- more leavese0
- Direction
- moree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the low seeding rate (LSR) the frequency of leaf appearance on each tiller was increased, resulting in tillers having more leaves at decimal growth stage (DGS) 30.”
t0“Winter Wheat”
Claim · model-written summary
High seeding rate reduced leaf appearance among tillers.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- high seeding rate (HSR)e0
- Outcome
- leaf appearance among tillerse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the high seeding rate (HSR), leaf appearance among tillers was reduced”
t0“Winter Wheat”
Claim · model-written summary
Under high seeding rate only fall tillers had enough leaf area to grow through harvest.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- fall tillers having enough leaf area to sustain growthe0
- Qualifier
- from DGS 30 to harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only fall tillers having enough leaf area to sustain growth from DGS 30 to harvest.”
t0“Winter Wheat”
Claim · model-written summary
Maximum leaf number was significantly greater at low than high seeding rate.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MLN was significantly greater at the LSR compared with the HSR.”
t0“Winter Wheat”
Claim · model-written summary
Main stems had greater maximum leaf number than Tiller 1.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- main steme0
- Outcome
- MLNe0
- Direction
- greatere0
- Comparator
- Tiller 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The MLN for the main stem was greater than those found on Tiller 1”
t0“Winter Wheat”
Claim · model-written summary
Tiller 1 had greater maximum leaf number than Tiller 2.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- Tiller 1e0
- Outcome
- MLNe0
- Direction
- greatere0
- Comparator
- Tiller 2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MLN for Tiller 1 was greater than those found on Tiller 2.”
t0“Winter Wheat”
Claim · model-written summary
Nitrogen timing had no consistent effect on phyllochron interval.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- N timinge0
- Outcome
- PIe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was not a consistent effect of N timing on PI”
t0“Winter Wheat”
Claim · model-written summary
Nitrogen timing had no effect on maximum leaf number.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- N timinge0
- Outcome
- MLNe0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no effects of N timing on MLN.”
t0“Winter Wheat”
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