Abstract
Field trials were conducted with spring sown sweet crop in 2007 and a fall sown one in 2008 to investigate the influence of fertilization on growth and development of sweet corn.The cultivar of Yuetian 9 was adopted as the test crop.It has been observed that dried matter mass maintained relatively high cumulating rates from seedling throughout all other growth stages for both sown dates.Two cumulating peaks were observed from node-elongating to tasseling and from silking to harvesting.In conditions of this study,supply of N was the dominant factor increasing dried matter mass and ear yield of sweet corn.Treatments with N fertilizers increased dried matter mass and ear yield in maturity by 445% and142.9%,627% and 193%,respectively for the fall and spring sown crop.Based on the regression analysis,the optimum economic N,P2O5 and K2O rates were 373.8,68.1 and 230.8 kg/ha,respectively for the spring sown crops. For the fall sown crop,optimum economic N rate was 371.4 kg/ha.In addition,appropriate N supply enhanced fresh ear weight,dried seed rate and vitamin C content of fresh seeds,while P and K fertilizations enhanced soluble sugar content of fresh seeds.Compared to fall sown sweet corn,the spring sown crop required 12 d more to reach maturity,and reduced dried matter mass and ear yield by 41.5% and 26.0% in average respectively.It was concluded that sown date had a significant influence on the growth and development of sweet corn.
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Claims 14
Claim · model-written summary
Dry matter accumulation had peaks from node elongation to tasseling and silking to harvest.
Verbatim
e0“Two cumulating peaks were observed from node-elongating to tasseling and from silking to harvesting.”
t0“sweet corn”
Claim · model-written summary
N fertilizer increased fall-sown dry matter mass by 445%.
- Taxon
- sweet cornt0
- Treatment
- N fertilizerse0
- Outcome
- dried matter masse0
- Direction
- increasede0
- Value
- 445%e0
- Qualifier
- falle0
Not reportedComparator
Verbatim
e0“Treatments with N fertilizers increased dried matter mass and ear yield in maturity by 445% and142.9%,627% and 193%,respectively for the fall and spring sown crop.”
t0“sweet corn”
Claim · model-written summary
N fertilizer increased fall-sown ear yield by 142.9%.
- Taxon
- sweet cornt0
- Treatment
- N fertilizerse0
- Outcome
- ear yielde0
- Direction
- increasede0
- Value
- 142.9%e0
- Qualifier
- falle0
Not reportedComparator
Verbatim
e0“Treatments with N fertilizers increased dried matter mass and ear yield in maturity by 445% and142.9%,627% and 193%,respectively for the fall and spring sown crop.”
t0“sweet corn”
Claim · model-written summary
N fertilizer increased spring-sown dry matter mass by 627%.
- Taxon
- sweet cornt0
- Treatment
- N fertilizerse0
- Outcome
- dried matter masse0
- Direction
- increasede0
- Value
- 627%e0
- Qualifier
- springe0
Not reportedComparator
Verbatim
e0“Treatments with N fertilizers increased dried matter mass and ear yield in maturity by 445% and142.9%,627% and 193%,respectively for the fall and spring sown crop.”
t0“sweet corn”
Claim · model-written summary
N fertilizer increased spring-sown ear yield by 193%.
- Taxon
- sweet cornt0
- Treatment
- N fertilizerse0
- Outcome
- ear yielde0
- Direction
- increasede0
- Value
- 193%e0
- Qualifier
- springe0
Not reportedComparator
Verbatim
e0“Treatments with N fertilizers increased dried matter mass and ear yield in maturity by 445% and142.9%,627% and 193%,respectively for the fall and spring sown crop.”
t0“sweet corn”
Claim · model-written summary
The economic optimum spring N rate was 373.8 kg/ha.
Verbatim
e0“the optimum economic N,P2O5 and K2O rates were 373.8,68.1 and 230.8 kg/ha,respectively for the spring sown crops.”
t0“sweet corn”
Claim · model-written summary
The economic optimum spring P2O5 rate was 68.1 kg/ha.
Verbatim
e0“the optimum economic N,P2O5 and K2O rates were 373.8,68.1 and 230.8 kg/ha,respectively for the spring sown crops.”
t0“sweet corn”
Claim · model-written summary
The economic optimum spring K2O rate was 230.8 kg/ha.
Verbatim
e0“the optimum economic N,P2O5 and K2O rates were 373.8,68.1 and 230.8 kg/ha,respectively for the spring sown crops.”
t0“sweet corn”
Claim · model-written summary
The economic optimum fall N rate was 371.4 kg/ha.
Verbatim
e0“For the fall sown crop,optimum economic N rate was 371.4 kg/ha.”
t0“sweet corn”
Claim · model-written summary
Appropriate N enhanced fresh ear weight, dried seed rate and fresh-seed vitamin C content.
- Taxon
- sweet cornt0
- Treatment
- appropriate N supplye0
- Outcome
- fresh ear weight,dried seed rate and vitamin C content of fresh seedse0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“appropriate N supply enhanced fresh ear weight,dried seed rate and vitamin C content of fresh seeds”
t0“sweet corn”
Claim · model-written summary
P and K fertilization enhanced fresh-seed soluble sugar content.
- Taxon
- sweet cornt0
- Treatment
- P and K fertilizationse0
- Outcome
- soluble sugar content of fresh seedse0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“P and K fertilizations enhanced soluble sugar content of fresh seeds”
t0“sweet corn”
Claim · model-written summary
Spring-sown corn matured 12 d later than fall-sown corn.
Verbatim
e0“Compared to fall sown sweet corn,the spring sown crop required 12 d more to reach maturity”
Claim · model-written summary
Spring sowing reduced dry matter mass by 41.5% versus fall sowing.
Verbatim
e0“Compared to fall sown sweet corn,the spring sown crop required 12 d more to reach maturity,and reduced dried matter mass and ear yield by 41.5% and 26.0% in average respectively.”
Claim · model-written summary
Spring sowing reduced ear yield by 26.0% versus fall sowing.
Verbatim
e0“Compared to fall sown sweet corn,the spring sown crop required 12 d more to reach maturity,and reduced dried matter mass and ear yield by 41.5% and 26.0% in average respectively.”
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