Abstract
The objective of the present field experiment was to examine how plant density and en-hanced source, i.e. thinning treatments, may affect grain yield and its components for a non-prolific maize hybrid, SC704. The environment of the hybrid maize crop was changed at intervals over its life cycle by removing every other plant in rows equispaced at 75 cm apart with a population of 13.34 plants m-2. The plants were grown with no wa-ter or nutrient restrictions. Results showed that earlier thinning was associated with greater stem, leaf, shoot and ear dry weight accumulation, ear kernel weight (EKW) and kernel number per ear row (KNER). In this ways the greatest of these characteristics were obtained in thinning at sowing i.e. 6.67 plants m-2 throughout. Delay in thinning un-til the 12-leaf stage reduced stem dry weight and EKW significantly. Thinning at tasseling also resulted in significantly lower stem dry weight accumulation compared to thinning at sowing. At final harvest, the stem dry weight of plants thinned at tasseling was 20.47% (P<0.05) lower than those thinned at sowing. Similar effects were found upon delay in thinning until tasseling on leaf, shoot, and ear dry weight accumulation. Delay in thinning until the 12-leaf stage or later, also reduced EKW significantly compared to plants thinned at sowing. This reduction was attributable to decreased KNER and 1000-kernel weight. According to these results, KNER and 1000-KW were found to be yield compo-nents sensitive to light environment.
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Claims 9
Claim · model-written summary
Earlier thinning increased stem, leaf, shoot and ear dry weight accumulation.
- Material
- SC704e1
- Treatment
- earlier thinninge0
- Outcome
- stem, leaf, shoot and ear dry weight accumulatione0
- Direction
- greatere0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“earlier thinning was associated with greater stem, leaf, shoot and ear dry weight accumulation, ear kernel weight (EKW) and kernel number per ear row (KNER).”
e1“SC704”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Earlier thinning increased ear kernel weight and kernel number per ear row.
- Treatment
- earlier thinninge0
- Outcome
- ear kernel weight (EKW) and kernel number per ear row (KNER)e0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“earlier thinning was associated with greater stem, leaf, shoot and ear dry weight accumulation, ear kernel weight (EKW) and kernel number per ear row (KNER).”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Thinning at sowing produced the greatest reported growth and yield component characteristics.
- Treatment
- thinning at sowinge0
- Outcome
- these characteristicse0
- Direction
- greateste0
- Value
- 6.67 plants m-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the greatest of these characteristics were obtained in thinning at sowing i.e. 6.67 plants m-2 throughout.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Thinning delayed to the 12-leaf stage significantly reduced stem dry weight and ear kernel weight.
- Treatment
- Delay in thinning un-til the 12-leaf stagee0
- Outcome
- stem dry weight and EKWe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delay in thinning un-til the 12-leaf stage reduced stem dry weight and EKW significantly.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Thinning at tasseling reduced final stem dry weight by 20.47% relative to thinning at sowing.
- Treatment
- thinned at tasselinge0
- Outcome
- stem dry weighte0
- Direction
- lowere0
- Value
- 20.47%e0
- Comparator
- thinned at sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At final harvest, the stem dry weight of plants thinned at tasseling was 20.47% (P<0.05) lower than those thinned at sowing.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Delaying thinning to tasseling likewise lowered leaf, shoot and ear dry weight accumulation.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similar effects were found upon delay in thinning until tasseling on leaf, shoot, and ear dry weight accumulation.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Thinning delayed until the 12-leaf stage or later significantly reduced ear kernel weight relative to sowing-time thinning.
- Treatment
- Delay in thinning until the 12-leaf stage or latere0
- Outcome
- EKWe0
- Direction
- reducede0
- Comparator
- plants thinned at sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Delay in thinning until the 12-leaf stage or later, also reduced EKW significantly compared to plants thinned at sowing.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Lower ear kernel weight after delayed thinning was attributed to fewer kernels per ear row and lower 1000-kernel weight.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This reduction was attributable to decreased KNER and 1000-kernel weight.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
Claim · model-written summary
Kernel number per ear row and 1000-kernel weight were sensitive to light environment.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“KNER and 1000-KW were found to be yield compo-nents sensitive to light environment.”
t0“Dry Matter Accumulation and Partitioning as Affected by Thinning in a Non-Prolific Maize Hybrid”
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