Abstract
During the 2004–05 growing season, a study was conducted to determine effect of cover crop, their mixture and fertilizer N rates on above ground biomass (AGB) yields, and Leaf Area Index (LAI) of Bt sweet corn. The following cover crop nitrogen fertility treatments were applied using randomized complete-block design with three replications: 1) fall-0 N, fallow; spring-0 N, 2) fall-0 N, abruzzi rye; spring-0 N, 3) fall-0 N, hairy vetch; spring-0 N, 4) fall-0 N, abruzzi rye+hairy vetch; spring-0 N, 5) fall-0 N, fallow; spring-101 kg N/ha, 6) fall-0 N, abruzzi rye; spring-101 kg N/ha, 7) fall-0 N, hairy vetch; spring-101 kg N/ha, 8) fall-0 N, abruzzi rye+hairy vetch; spring-101 kg N/ha, 9) fall-0 N, fallow; spring-202 kg N/ha, 10) fall-0 N, abruzzi rye; spring-202 kg N/ha, 11) fall-0 N, hairy vetch; spring-202 kg N/ha, and 12) fall-0 N, abruzzi rye+hairy vetch; spring-202 kg N/ha. In Spring 2005, `Attribute BSS0977' bi-color (BC) supersweet (sh2) corn seeds were field planted. AGB yields were collected during harvest week while LAI was recorded at tasseling (6/27), silking (7/8) and one week after harvest (7/25). Hairy vetch; spring-101 kg N/ha produced highest LAI at tasseling (2.18), silking (2.73), and one week after harvest (2.57). Lowest LAI at tasseling (1.12) and silking(1.60) were produced by abruzzi rye; spring-0 N with fallow; spring-0 N producing lowest LAI (1.40) one week after harvest. Maximum AGB fresh (40.5 Mg/ha) and dry weight (12.1 Mg/ha) yields were produced by hairy vetch; spring-101kg N/ha, while minimum AGB fresh (9.6 Mg/ha) and dry weight (3.6 Mg/ha) yields were produced by abruzzi rye; spring-0 N. Results imply LAI at each growth stage and AGB yields of this BCsh2 corn variety are best supported by hairy vetch supplemented with N at 101 kg/ha.
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Claims 11
Claim · model-written summary
Hairy vetch with spring 101 kg N/ha gave the highest tasseling LAI, 2.18.
- Taxon
- Sweet Cornt0
- Treatment
- Hairy vetch; spring-101 kg N/hae0
- Outcome
- LAI at tasselinge0
- Direction
- higheste0
- Value
- 2.18e0
Not reportedComparator
Verbatim
e0“Hairy vetch; spring-101 kg N/ha produced highest LAI at tasseling (2.18), silking (2.73), and one week after harvest (2.57).”
t0“Sweet Corn”
Claim · model-written summary
Hairy vetch with spring 101 kg N/ha gave the highest silking LAI, 2.73.
- Taxon
- Sweet Cornt0
- Treatment
- Hairy vetch; spring-101 kg N/hae0
- Outcome
- LAI at tasseling (2.18), silkinge0
- Direction
- higheste0
- Value
- 2.73e0
Not reportedComparator
Verbatim
e0“Hairy vetch; spring-101 kg N/ha produced highest LAI at tasseling (2.18), silking (2.73), and one week after harvest (2.57).”
t0“Sweet Corn”
Claim · model-written summary
Hairy vetch with spring 101 kg N/ha gave the highest postharvest LAI, 2.57.
- Taxon
- Sweet Cornt0
- Treatment
- Hairy vetch; spring-101 kg N/hae0
- Outcome
- one week after harveste0
- Direction
- higheste0
- Value
- 2.57e0
Not reportedComparator
Verbatim
e0“Hairy vetch; spring-101 kg N/ha produced highest LAI at tasseling (2.18), silking (2.73), and one week after harvest (2.57).”
t0“Sweet Corn”
Claim · model-written summary
Rye without spring nitrogen gave the lowest tasseling LAI, 1.12.
- Taxon
- Sweet Cornt0
- Treatment
- abruzzi rye; spring-0 Ne0
- Outcome
- LAI at tasselinge0
- Direction
- Loweste0
- Value
- 1.12e0
Not reportedComparator
Verbatim
e0“Lowest LAI at tasseling (1.12) and silking(1.60) were produced by abruzzi rye; spring-0 N”
t0“Sweet Corn”
Claim · model-written summary
Rye without spring nitrogen gave the lowest silking LAI, 1.60.
Not reportedComparator
Verbatim
e0“Lowest LAI at tasseling (1.12) and silking(1.60) were produced by abruzzi rye; spring-0 N”
t0“Sweet Corn”
Claim · model-written summary
Fallow without spring nitrogen gave the lowest postharvest LAI, 1.40.
- Taxon
- Sweet Cornt0
- Treatment
- fallow; spring-0 Ne0
- Outcome
- LAIe0
- Direction
- loweste0
- Value
- 1.40e0
- Qualifier
- one week after harveste0
Not reportedComparator
Verbatim
e0“fallow; spring-0 N producing lowest LAI (1.40) one week after harvest”
t0“Sweet Corn”
Claim · model-written summary
Vetch with spring 101 kg N/ha gave maximum fresh aboveground biomass of 40.5 Mg/ha.
- Taxon
- Sweet Cornt0
- Treatment
- hairy vetch; spring-101kg N/hae0
- Outcome
- AGB freshe0
- Direction
- Maximume0
- Value
- 40.5 Mg/hae0
Not reportedComparator
Verbatim
e0“Maximum AGB fresh (40.5 Mg/ha) and dry weight (12.1 Mg/ha) yields were produced by hairy vetch; spring-101kg N/ha”
t0“Sweet Corn”
Claim · model-written summary
Vetch with spring 101 kg N/ha gave maximum dry aboveground biomass of 12.1 Mg/ha.
- Taxon
- Sweet Cornt0
- Treatment
- hairy vetch; spring-101kg N/hae0
- Outcome
- dry weighte0
- Direction
- Maximume0
- Value
- 12.1 Mg/hae0
Not reportedComparator
Verbatim
e0“Maximum AGB fresh (40.5 Mg/ha) and dry weight (12.1 Mg/ha) yields were produced by hairy vetch; spring-101kg N/ha”
t0“Sweet Corn”
Claim · model-written summary
Rye without spring nitrogen gave minimum fresh aboveground biomass of 9.6 Mg/ha.
- Taxon
- Sweet Cornt0
- Treatment
- abruzzi rye; spring-0 Ne0
- Outcome
- AGB freshe0
- Direction
- minimume0
- Value
- 9.6 Mg/hae0
Not reportedComparator
Verbatim
e0“minimum AGB fresh (9.6 Mg/ha) and dry weight (3.6 Mg/ha) yields were produced by abruzzi rye; spring-0 N”
t0“Sweet Corn”
Claim · model-written summary
Rye without spring nitrogen gave minimum dry aboveground biomass of 3.6 Mg/ha.
- Taxon
- Sweet Cornt0
- Treatment
- abruzzi rye; spring-0 Ne0
- Outcome
- dry weighte0
- Direction
- minimume0
- Value
- 3.6 Mg/hae0
Not reportedComparator
Verbatim
e0“minimum AGB fresh (9.6 Mg/ha) and dry weight (3.6 Mg/ha) yields were produced by abruzzi rye; spring-0 N”
t0“Sweet Corn”
Claim · model-written summary
The authors recommend hairy vetch with 101 kg N/ha for LAI and biomass yield.
Verbatim
e0“LAI at each growth stage and AGB yields of this BCsh2 corn variety are best supported by hairy vetch supplemented with N at 101 kg/ha.”
t0“Sweet Corn”
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