Abstract
A hydroponics experiment was carried out to study the effects of nitrogen forms(NO-3-N,NH+4-N,and the mixture of NO-3-N and NH+4-N)on maize seedling under the phosphorus stress treatment,which was about biological characteristic and phosphorus absorption simulated by using Ca3(PO4)2 as phosphorus form supply.The results showed that,when compared with the KH2PO4 treatment,the biomass of maize plant under phosphorus stress supplied with NO-3-N,NH+4-N,and the mixture of NO-3-N and NH+4-N was reduced by 20.6%,12.9% and 15.4%,respectively.However,all treatments increased the roots-shoot ratio,roots volume,and steam-leaf ratio of maize,among which the roots-shoot ratio of NO-3-N supplied plants showed the highest increase rate.Meanwhile,leaf growth was significantly reduced by phosphorus stress,which resulted in reduction of leaf biomass and leaf area,in which the leaf area and photosynthetic rate of NH+4-N supplied plants showed the lowest reduction rate.Furthermore,the phosphorus absorption of NO-3-N supplied plants were higher than that of the other two nitrogen forms supplied plants.Therefore,we conclude that nitrogen forms supply is a major factor,which affects the adaptive response of maize to phosphorus stress,and the NH+4-N treatment is found more tolerant to phosphorus stress as compared to the other two nitrogen forms supplied plants.
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Claims 10
Claim · model-written summary
Phosphorus stress with NO-3-N reduced maize biomass by 20.6% against KH2PO4.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when compared with the KH2PO4 treatment,the biomass of maize plant under phosphorus stress supplied with NO-3-N,NH+4-N,and the mixture of NO-3-N and NH+4-N was reduced by 20.6%,12.9% and 15.4%,respectively.”
Claim · model-written summary
Phosphorus stress with NH+4-N reduced maize biomass by 12.9% against KH2PO4.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when compared with the KH2PO4 treatment,the biomass of maize plant under phosphorus stress supplied with NO-3-N,NH+4-N,and the mixture of NO-3-N and NH+4-N was reduced by 20.6%,12.9% and 15.4%,respectively.”
Claim · model-written summary
Phosphorus stress with the mixture of NO-3-N and NH+4-N reduced maize biomass by 15.4% against KH2PO4.
- Treatment
- the mixture of NO-3-N and NH+4-Ne0
- Outcome
- biomasse0
- Direction
- reducede0
- Value
- 15.4%e0
- Comparator
- KH2PO4 treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when compared with the KH2PO4 treatment,the biomass of maize plant under phosphorus stress supplied with NO-3-N,NH+4-N,and the mixture of NO-3-N and NH+4-N was reduced by 20.6%,12.9% and 15.4%,respectively.”
Claim · model-written summary
Treatments increased maize root-shoot ratio, root volume and stem-leaf ratio.
- Treatment
- all treatmentse0
- Outcome
- roots-shoot ratio,roots volume,and steam-leaf ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all treatments increased the roots-shoot ratio,roots volume,and steam-leaf ratio of maize”
Claim · model-written summary
NO-3-N plants had the highest increase in root-shoot ratio.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the roots-shoot ratio of NO-3-N supplied plants showed the highest increase rate”
t0“maize seedling”
Claim · model-written summary
Phosphorus stress significantly reduced maize leaf biomass and leaf area.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf growth was significantly reduced by phosphorus stress,which resulted in reduction of leaf biomass and leaf area”
t0“maize seedling”
Claim · model-written summary
NH+4-N plants had the lowest reduction in leaf area and photosynthetic rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf area and photosynthetic rate of NH+4-N supplied plants showed the lowest reduction rate”
t0“maize seedling”
Claim · model-written summary
NO-3-N plants absorbed more phosphorus than the other nitrogen forms.
- Treatment
- NO-3-Ne0
- Outcome
- phosphorus absorptione0
- Direction
- highere0
- Comparator
- the other two nitrogen forms supplied plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the phosphorus absorption of NO-3-N supplied plants were higher than that of the other two nitrogen forms supplied plants”
t0“maize seedling”
Claim · model-written summary
The authors conclude that nitrogen form affects maize adaptation to phosphorus stress.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen forms supply is a major factor,which affects the adaptive response of maize to phosphorus stress”
Claim · model-written summary
NH+4-N plants were judged more tolerant to phosphorus stress than the others.
- Treatment
- NH+4-N treatmente0
- Outcome
- tolerant to phosphorus stresse0
- Direction
- more tolerante0
- Comparator
- the other two nitrogen forms supplied plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the NH+4-N treatment is found more tolerant to phosphorus stress as compared to the other two nitrogen forms supplied plants”
t0“maize seedling”
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