Abstract
Abstract Planting date (PD) can significantly affect corn ( Zea mays L.) yield. Our objective was to investigate the effects of hybrid and PD later than traditional time on irrigated corn performance in the Texas High Plains. A 2‐yr field study was conducted using four (2013) to six (2014) hybrids and four PDs (mid‐May [PD1], late May–early June [PD2], mid‐June [PD3], and late June–early July [PD4]). In PD1 and PD2, long‐season hybrids had greater yields (12–15 Mg ha −1 ) than short‐season hybrids (9–13 Mg ha −1 ). In PD4, short‐season hybrids (8–11 Mg ha −1 ) had yield advantage over long‐season hybrids (4–10 Mg ha −1 ). Low yield at late planting was related to reduced biomass, harvest index, kernel weight, and kernel number. Seasonal evapotranspiration (ET) was only reported in 2013. The average ET over PDs was 767 mm in a long‐season hybrid and 718 mm in a short‐season hybrid. Late planting resulted in lower ET (600 mm in PD4 vs. 822 mm in PD1). Hybrid and PD did not affect water use efficiency (WUE) except for 33D53AM, which had low WUE in PD4 due to low yield with late planting of this long‐season hybrid. This study demonstrated that high yield (∼15 Mg ha −1 ) and WUE (∼1.5 kg m −3 ) can be achieved with long‐season hybrids when planted before mid‐June, but short‐season hybrids were a better choice after mid‐June. With water limitations, further study is warranted on planting short‐season hybrids after mid‐June to reduce water use and irrigation.
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Claims 9
Claim · model-written summary
At the first two planting dates, long season hybrids yielded more than short season hybrids.
- Taxon
- corn
Zea mays subsp. mayse1 - Material
- long‐season hybridse0
- Treatment
- PD1 and PD2e0
- Outcome
- yieldse0
- Direction
- greatere0
- Value
- 12–15 Mg ha −1e0
- Comparator
- short‐season hybridse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In PD1 and PD2, long‐season hybrids had greater yields (12–15 Mg ha −1 ) than short‐season hybrids (9–13 Mg ha −1 ).”
e1“corn ( Zea mays L.)”
Claim · model-written summary
At the fourth planting date, short season hybrids yielded more than long season hybrids.
- Taxon
- cornZea mays subsp. mayse1
- Material
- short‐season hybridse0
- Treatment
- PD4e0
- Outcome
- yield advantagee0
- Direction
- advantagee0
- Value
- 8–11 Mg ha −1e0
- Comparator
- long‐season hybridse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In PD4, short‐season hybrids (8–11 Mg ha −1 ) had yield advantage over long‐season hybrids (4–10 Mg ha −1 ).”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Lower yield under late planting was related to reduced biomass, harvest index and kernel traits.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- late plantinge0
- Outcome
- Low yielde0
- Direction
- Lowe0
- Qualifier
- reduced biomass, harvest index, kernel weight, and kernel numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low yield at late planting was related to reduced biomass, harvest index, kernel weight, and kernel number.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Late planting lowered evapotranspiration relative to PD1.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Late plantinge0
- Outcome
- ETe0
- Direction
- lowere0
- Value
- 600 mme0
- Qualifier
- 822 mme0
- Comparator
- PD1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late planting resulted in lower ET (600 mm in PD4 vs. 822 mm in PD1).”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Hybrid and planting date generally did not affect water use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Hybrid and PDe0
- Outcome
- water use efficiency (WUE)e0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hybrid and PD did not affect water use efficiency (WUE) except for 33D53AM”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Hybrid 33D53AM had low water use efficiency at PD4.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“33D53AM, which had low WUE in PD4 due to low yield with late planting of this long‐season hybrid.”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Long season hybrids planted before mid June can achieve high yield and water use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Material
- long‐season hybridse0
- Treatment
- planted before mid‐Junee0
- Outcome
- high yielde0
- Value
- ∼15 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high yield (∼15 Mg ha −1 ) and WUE (∼1.5 kg m −3 ) can be achieved with long‐season hybrids when planted before mid‐June”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Long season hybrids planted before mid June can achieve high water use efficiency.
- Taxon
- cornZea mays subsp. mayse1
- Material
- long‐season hybridse0
- Outcome
- WUEe0
- Value
- ∼1.5 kg m −3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high yield (∼15 Mg ha −1 ) and WUE (∼1.5 kg m −3 ) can be achieved with long‐season hybrids when planted before mid‐June”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Short season hybrids were recommended after mid June.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- short‐season hybrids were a better choice after mid‐Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“short‐season hybrids were a better choice after mid‐June”
e1“corn ( Zea mays L.)”
The same questions in other papers
sowing time · physiology: water · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.