Abstract
A field experiment was conducted to study soil nutrient restrictive factors and plant nutrient uptake and accumulation of super-high-yield summer maize in 2007 and 2008.The results show that the maize yields are highest under the OPT treatment(By ASI),12051.2 kg/ha and 13246.3 kg/ha in 2007 and 2008 respectively.The nitrogen and potassium fertilization could evidently increase the yields by 8.92% and 7.14%,which indicates N and K are main nutrient restrictive factors.The accumulations of nitrogen,phosphorus and potassium of super-highyield summer maize plants are increased with the extension of the bearing period,and the nutrient accumulation amounts are maximum at the maturity stage.The order of nutrient accumulations is K2ONP2O5,and the absorbed nutrient ratio with 100 kilogram maize of N,P2O5 and K2O are 2.40∶1∶2.73.The key period of nutrient absorption is from the jointing stage to silking stage,and the absorbed nutrient rates are the highest.After the silking stage,maize plant absorbs more nitrogen and phosphorus.Leaf is distribution center of nitrogen and phosphorus from the seeding stage to silking stage,and the transfer efficiency of nitrogen and phosphorus are higher in stems and leaves at the late stages,while the transfer proportion of potassium is small.Nutrients are absorbed continuously at the whole growth period of super-high-yield summer maize,it is essential to super-high-yield topdressing after the silking stage that ensure adequate nutrients at the grain filling stage.
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Claims 14
Claim · model-written summary
Maize yield under OPT treatment was 12051.2 kg/ha in 2007.
- Treatment
- OPT treatment(By ASI)e0
- Outcome
- maize yieldse0
- Direction
- higheste0
- Value
- 12051.2 kg/hae0
- Qualifier
- 2007e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize yields are highest under the OPT treatment(By ASI),12051.2 kg/ha and 13246.3 kg/ha in 2007 and 2008 respectively”
Claim · model-written summary
Maize yield under OPT treatment was 13246.3 kg/ha in 2008.
- Treatment
- OPT treatment(By ASI)e0
- Outcome
- maize yieldse0
- Direction
- higheste0
- Value
- 13246.3 kg/hae0
- Qualifier
- 2008e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maize yields are highest under the OPT treatment(By ASI),12051.2 kg/ha and 13246.3 kg/ha in 2007 and 2008 respectively”
Claim · model-written summary
nitrogen fertilization increased maize yield by 8.92%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen and potassium fertilization could evidently increase the yields by 8.92% and 7.14%”
t0“summer maize”
Claim · model-written summary
potassium fertilization increased maize yield by 7.14%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrogen and potassium fertilization could evidently increase the yields by 8.92% and 7.14%”
t0“summer maize”
Claim · model-written summary
Nitrogen and potassium were identified as principal limiting nutrients for maize yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N and K are main nutrient restrictive factors”
t0“summer maize”
Claim · model-written summary
Nitrogen, phosphorus and potassium accumulation increased through maize development and peaked at maturity.
- Organ / stage
- maturity stagee0
- Outcome
- accumulations of nitrogen,phosphorus and potassiume0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulations of nitrogen,phosphorus and potassium of super-highyield summer maize plants are increased with the extension of the bearing period,and the nutrient accumulation amounts are maximum at the maturity stage”
Claim · model-written summary
The order of maize nutrient accumulation was reported as K2ONP2O5.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The order of nutrient accumulations is K2ONP2O5”
t0“summer maize”
Claim · model-written summary
N, P2O5 and K2O uptake per 100 kilograms of maize was in the ratio 2.40∶1∶2.73.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the absorbed nutrient ratio with 100 kilogram maize of N,P2O5 and K2O are 2.40∶1∶2.73”
Claim · model-written summary
Nutrient absorption rates were highest from jointing to silking.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The key period of nutrient absorption is from the jointing stage to silking stage,and the absorbed nutrient rates are the highest”
t0“summer maize”
Claim · model-written summary
Maize absorbed more nitrogen and phosphorus after silking.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After the silking stage,maize plant absorbs more nitrogen and phosphorus”
Claim · model-written summary
Leaves were the principal nitrogen and phosphorus distribution center before silking.
- Organ / stage
- Leafe0
- Outcome
- distribution center of nitrogen and phosphoruse0
- Qualifier
- seeding stage to silking stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf is distribution center of nitrogen and phosphorus from the seeding stage to silking stage”
t0“summer maize”
Claim · model-written summary
Late-stage transfer efficiency of nitrogen and phosphorus was higher in stems and leaves, whereas potassium transfer proportion was small.
- Organ / stage
- stems and leavese0
- Outcome
- transfer efficiency of nitrogen and phosphoruse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the transfer efficiency of nitrogen and phosphorus are higher in stems and leaves at the late stages,while the transfer proportion of potassium is small”
t0“summer maize”
Claim · model-written summary
Nutrients were absorbed throughout maize growth.
- Outcome
- Nutrients are absorbed continuouslye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nutrients are absorbed continuously at the whole growth period of super-high-yield summer maize”
Claim · model-written summary
Topdressing after silking is recommended to sustain grain-filling nutrient supply.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is essential to super-high-yield topdressing after the silking stage that ensure adequate nutrients at the grain filling stage”
t0“summer maize”
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See all 2,185 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.