Abstract
The effects of different nitrogen forms on the growth and photosynthesis of sunflower (Helianthus annuus L.) were hydroponically studied. The results showed that plant height,leaf area and dry matter of sunflower with the fertilization of nitrate nitrogen were significantly higher than those with the dertilization of ammonium nitrogen and the plants fertilization with nitrate nitrogen presented a higher net photosynthetic rate,a lower stomatal conductancwe (Cs) and a lower concentration of carbon dioxide in intercellular space (Ci).The fertilizations of different nitrogen forms did not significantly differed in Fv/Fm but the plants fertilized with nitrate nitrogen presented a significantly higher quantum yield of ΦPSⅡ linear electron transport (ΦPSⅡ),a significantly higher photochemical quenching (qp) and a significantly higher qpparent electron transport rate (ETR) but a lower non-photochemical fluorescence quenching (qp) than the plants fertilized with ammonium nitrogen.Inhibited carbon assimilation was the important reason for lowered net photosynthetic rate.
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Claims 10
Claim · model-written summary
Nitrate nitrogen fertilization gave significantly higher plant height, leaf area and dry matter of sunflower than ammonium nitrogen.
- Taxon
- Sunflower
Helianthus annuust0 - Treatment
- fertilization of nitrate nitrogene1
- Outcome
- plant height,leaf area and dry mattere1
- Direction
- highere1
- Comparator
- ammonium nitrogene1
- Setting
- hydroponicallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e0“were hydroponically studied”
e1“plant height,leaf area and dry matter of sunflower with the fertilization of nitrate nitrogen were significantly higher than those with the dertilization of ammonium nitrogen”
Claim · model-written summary
Nitrate nitrogen fertilization gave a higher net photosynthetic rate in sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- fertilization with nitrate nitrogene2
- Outcome
- net photosynthetic ratee2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e2“the plants fertilization with nitrate nitrogen presented a higher net photosynthetic rate”
Claim · model-written summary
Nitrate nitrogen fertilization gave a lower stomatal conductance in sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- fertilization with nitrate nitrogene2
- Outcome
- stomatal conductancwe (Cs)e3
- Direction
- lowere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e2“the plants fertilization with nitrate nitrogen presented a higher net photosynthetic rate”
e3“a lower stomatal conductancwe (Cs)”
Claim · model-written summary
Nitrate nitrogen fertilization gave a lower CO2 concentration in the intercellular space of sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- fertilization with nitrate nitrogene2
- Outcome
- concentration of carbon dioxide in intercellular space (Ci)e4
- Direction
- lowere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e2“the plants fertilization with nitrate nitrogen presented a higher net photosynthetic rate”
e4“a lower concentration of carbon dioxide in intercellular space (Ci)”
Claim · model-written summary
Different nitrogen forms did not significantly differ in Fv/Fm of sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- fertilizations of different nitrogen formse5
- Outcome
- Fv/Fme5
- Direction
- did not significantly differede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e5“The fertilizations of different nitrogen forms did not significantly differed in Fv/Fm”
Claim · model-written summary
Nitrate nitrogen fertilization gave a significantly higher quantum yield of ΦPSⅡ linear electron transport in sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- nitrate nitrogene6
- Outcome
- quantum yield of ΦPSⅡ linear electron transporte6
- Direction
- highere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e6“the plants fertilized with nitrate nitrogen presented a significantly higher quantum yield of ΦPSⅡ linear electron transport”
Claim · model-written summary
Nitrate nitrogen fertilization gave a significantly higher photochemical quenching in sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- nitrate nitrogene6
- Outcome
- photochemical quenching (qp)e7
- Direction
- highere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e6“the plants fertilized with nitrate nitrogen presented a significantly higher quantum yield of ΦPSⅡ linear electron transport”
e7“a significantly higher photochemical quenching (qp)”
Claim · model-written summary
Nitrate nitrogen fertilization gave a significantly higher electron transport rate (ETR) in sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- nitrate nitrogene6
- Outcome
- qpparent electron transport rate (ETR)e7
- Direction
- highere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e6“the plants fertilized with nitrate nitrogen presented a significantly higher quantum yield of ΦPSⅡ linear electron transport”
e7“a significantly higher qpparent electron transport rate (ETR)”
Claim · model-written summary
Nitrate nitrogen fertilization gave a lower non-photochemical fluorescence quenching than ammonium nitrogen in sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- nitrate nitrogene6
- Outcome
- non-photochemical fluorescence quenching (qp)e7
- Direction
- lowere7
- Comparator
- ammonium nitrogene7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e6“the plants fertilized with nitrate nitrogen presented a significantly higher quantum yield of ΦPSⅡ linear electron transport”
e7“but a lower non-photochemical fluorescence quenching (qp) than the plants fertilized with ammonium nitrogen”
Claim · model-written summary
Inhibited carbon assimilation is the important reason for the lowered net photosynthetic rate of sunflower.
- Taxon
- SunflowerHelianthus annuust0
- Outcome
- lowered net photosynthetic ratee0
- Qualifier
- Inhibited carbon assimilatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sunflower (Helianthus annuus)”
e0“Inhibited carbon assimilation was the important reason for lowered net photosynthetic rate”
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See all 13 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.