Abstract
A field experiment was conducted on super-high-yielding conditions to evaluate the effects of application of phosphorus combined with nitrogen fertilizer on photosynthetic characteristics after anthesis and yield in super-high-yielding wheat.The net photosynthesis rate(Pn),intercellular CO2 concentration(Ci),stomatal conductance(Gs) and transpiration rate(Tr) in super-high-yield wheat were measured using Li-6400 portable photosynthesis system with an open flowgas exchange system.The results indicated that application of phosphorus combined with nitrogen fertilizer adjust greatly photosynthetic characteristics after anthesis in super-high-yielding wheat.Pn、Gs、Tr、leaf area index(LAI) and chlorophyll content(SPAD value) were downtrend after anthesis in wheat,but that of the fertilizer treatments dropped slowly at the early stage compared to the control,and N1P2、N2P2、N2P3 were extremely signifycant than the control.Pn,Gs and Tr were enhanced with the increasing rates of fertilizers,Chl(SPAD value) was increased,and LAI was improved.However,surplus rates of fertilizers(P2O5 225 kg/ha) accelerated the leaf senescence,decreased grains per spike and 1000-grain weight,which leaded to yield reduction.With statistical analysis,application of phosphorus combined with nitrogen fertilizer had extremely significant interaction effects on Pn、LAI、SPAD value and so on.The highest grain yield was observed in the treatment with N 300 kg/ha applied,P 150 kg/ha.
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Claims 9
Claim · model-written summary
Post anthesis Pn, Gs, Tr, LAI and SPAD declined in wheat.
- Taxon
- wheat
Triticum aestivume0 - Organ / stage
- after anthesise0
- Outcome
- Pn、Gs、Tr、leaf area index(LAI) and chlorophyll content(SPAD value)e0
- Direction
- downtrende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn、Gs、Tr、leaf area index(LAI) and chlorophyll content(SPAD value) were downtrend after anthesis in wheat”
Claim · model-written summary
Fertiliser treatments slowed early post anthesis declines compared with control, particularly N1P2, N2P2 and N2P3.
- Taxon
- wheatTriticum aestivume1
- Treatment
- fertilizer treatmentse0
- Outcome
- dropped slowlye0
- Direction
- dropped slowlye0
- Qualifier
- N1P2、N2P2、N2P3e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that of the fertilizer treatments dropped slowly at the early stage compared to the control,and N1P2、N2P2、N2P3 were extremely signifycant than the control.”
e1“after anthesis in wheat”
Claim · model-written summary
Pn, Gs and Tr rose with increasing fertiliser rates.
- Taxon
- wheatTriticum aestivume1
- Treatment
- increasing rates of fertilizerse0
- Outcome
- Pn,Gs and Tre0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn,Gs and Tr were enhanced with the increasing rates of fertilizers”
e1“after anthesis in wheat”
Claim · model-written summary
Fertiliser increased SPAD chlorophyll and improved LAI.
- Taxon
- wheatTriticum aestivume2
- Treatment
- application of phosphorus combined with nitrogen fertilizere1
- Outcome
- Chl(SPAD value)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chl(SPAD value) was increased,and LAI was improved.”
e1“The results indicated that application of phosphorus combined with nitrogen fertilizer”
e2“after anthesis in wheat”
Claim · model-written summary
Excess fertiliser accelerated leaf senescence.
- Taxon
- wheatTriticum aestivume1
- Treatment
- surplus rates of fertilizers(P2O5 225 kg/ha)e0
- Outcome
- leaf senescencee0
- Direction
- acceleratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surplus rates of fertilizers(P2O5 225 kg/ha) accelerated the leaf senescence”
e1“after anthesis in wheat”
Claim · model-written summary
Excess fertiliser reduced grains per spike and 1000-grain weight.
- Taxon
- wheatTriticum aestivume1
- Treatment
- surplus rates of fertilizers(P2O5 225 kg/ha)e0
- Outcome
- grains per spike and 1000-grain weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surplus rates of fertilizers(P2O5 225 kg/ha) accelerated the leaf senescence,decreased grains per spike and 1000-grain weight”
e1“after anthesis in wheat”
Claim · model-written summary
Excess fertiliser reduced yield.
- Taxon
- wheatTriticum aestivume1
- Treatment
- surplus rates of fertilizers(P2O5 225 kg/ha)e0
- Outcome
- yielde0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surplus rates of fertilizers(P2O5 225 kg/ha) accelerated the leaf senescence,decreased grains per spike and 1000-grain weight,which leaded to yield reduction.”
e1“after anthesis in wheat”
Claim · model-written summary
Combined phosphorus and nitrogen had a significant interaction effect on Pn, LAI and SPAD.
- Taxon
- wheatTriticum aestivume1
- Treatment
- application of phosphorus combined with nitrogen fertilizere0
- Outcome
- Pn、LAI、SPAD valuee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of phosphorus combined with nitrogen fertilizer had extremely significant interaction effects on Pn、LAI、SPAD value and so on.”
e1“after anthesis in wheat”
Claim · model-written summary
Highest grain yield occurred with N 300 kg/ha and P 150 kg/ha.
- Taxon
- wheatTriticum aestivume1
- Treatment
- N 300 kg/ha applied,P 150 kg/hae0
- Outcome
- grain yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest grain yield was observed in the treatment with N 300 kg/ha applied,P 150 kg/ha.”
e1“after anthesis in wheat”
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