Abstract
Field experiments involving proso millet (Panicum miliaceum L.) cultivar under four nitrogen (N) levels (N0, N60, N105 and N150) were conducted in 2015 and 2016 to explore the decrease in grain yield under N deficiency related to the changes in leaf photosynthetic characteristics, carbon (C)–N balance and N use efficiency. Results showed that N deficiency decreased the net photosynthesis rate, stomatal conductance, transpiration rate and chlorophyll content and increased the intercellular CO2 concentration of proso millet flag leaves from flowering to maturity. N deficiency negatively regulated the C–N balance and increased the C/N ratio by reducing the total N, soluble protein and soluble sugar contents, resulting in high starch content. N uptake and utilisation were significantly reduced because of less available N. Significantly positive correlations were observed between the grain yield and photosynthetic characteristics or N use efficiency, whereas a negative correlation was found between the grain yield and the C/N ratio. The yields generated by N0, N60 and N105 were lower than that of N150 in both years. The N fertiliser regression formulae developed in the study would provide useful information about the N fertiliser rate of proso millet.
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Claims 15
Claim · model-written summary
Nitrogen deficiency decreased net photosynthesis rate, stomatal conductance and transpiration rate in proso millet flag leaves.
- Taxon
- proso millet
Panicum miliaceume0 - Organ / stage
- flag leavese0
- Treatment
- N deficiencye0
- Outcome
- net photosynthesis rate, stomatal conductance, transpiration ratee0
- Direction
- decreasede0
- Qualifier
- from flowering to maturitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased the net photosynthesis rate, stomatal conductance, transpiration rate and chlorophyll content and increased the intercellular CO2 concentration of proso millet flag leaves from flowering to maturity.”
Claim · model-written summary
Nitrogen deficiency decreased chlorophyll content in proso millet flag leaves.
- Taxon
- proso milletPanicum miliaceume0
- Organ / stage
- flag leavese0
- Treatment
- N deficiencye0
- Outcome
- chlorophyll contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased the net photosynthesis rate, stomatal conductance, transpiration rate and chlorophyll content and increased the intercellular CO2 concentration of proso millet flag leaves from flowering to maturity.”
Claim · model-written summary
Nitrogen deficiency increased intercellular CO2 concentration in proso millet flag leaves.
- Taxon
- proso milletPanicum miliaceume0
- Organ / stage
- flag leavese0
- Treatment
- N deficiencye0
- Outcome
- intercellular CO2 concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased the net photosynthesis rate, stomatal conductance, transpiration rate and chlorophyll content and increased the intercellular CO2 concentration of proso millet flag leaves from flowering to maturity.”
Claim · model-written summary
Nitrogen deficiency negatively regulated proso millet carbon–nitrogen balance.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N deficiencye0
- Outcome
- C–N balancee0
- Direction
- negatively regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency negatively regulated the C–N balance and increased the C/N ratio by reducing the total N, soluble protein and soluble sugar contents, resulting in high starch content.”
t0“proso millet”
Claim · model-written summary
Nitrogen deficiency increased the C/N ratio in proso millet.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N deficiencye0
- Outcome
- C/N ratioe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency negatively regulated the C–N balance and increased the C/N ratio by reducing the total N, soluble protein and soluble sugar contents, resulting in high starch content.”
t0“proso millet”
Claim · model-written summary
Nitrogen deficiency reduced total N, soluble protein and soluble sugar contents in proso millet.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N deficiencye0
- Outcome
- total N, soluble protein and soluble sugar contentse0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency negatively regulated the C–N balance and increased the C/N ratio by reducing the total N, soluble protein and soluble sugar contents, resulting in high starch content.”
t0“proso millet”
Claim · model-written summary
Nitrogen deficiency resulted in high starch content in proso millet.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N deficiencye0
- Outcome
- starch contente0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency negatively regulated the C–N balance and increased the C/N ratio by reducing the total N, soluble protein and soluble sugar contents, resulting in high starch content.”
t0“proso millet”
Claim · model-written summary
Lower available N significantly reduced proso millet N uptake and utilisation.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- less available Ne0
- Outcome
- N uptake and utilisatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N uptake and utilisation were significantly reduced because of less available N.”
t0“proso millet”
Claim · model-written summary
Proso millet grain yield correlated positively with photosynthetic characteristics.
- Taxon
- proso milletPanicum miliaceumt0
- Outcome
- grain yielde0
- Direction
- positivee0
- Comparator
- photosynthetic characteristicse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly positive correlations were observed between the grain yield and photosynthetic characteristics or N use efficiency”
t0“proso millet”
Claim · model-written summary
Proso millet grain yield correlated positively with N use efficiency.
- Taxon
- proso milletPanicum miliaceumt0
- Outcome
- grain yielde0
- Direction
- positivee0
- Comparator
- N use efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significantly positive correlations were observed between the grain yield and photosynthetic characteristics or N use efficiency”
t0“proso millet”
Claim · model-written summary
Proso millet grain yield correlated negatively with the C/N ratio.
- Taxon
- proso milletPanicum miliaceumt0
- Outcome
- grain yielde0
- Direction
- negativee0
- Comparator
- C/N ratioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a negative correlation was found between the grain yield and the C/N ratio.”
t0“proso millet”
Claim · model-written summary
N0 yielded less than N150 in both years.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N0e0
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- both yearse0
- Comparator
- N150e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields generated by N0, N60 and N105 were lower than that of N150 in both years.”
t0“proso millet”
Claim · model-written summary
N60 yielded less than N150 in both years.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N60e0
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- both yearse0
- Comparator
- N150e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields generated by N0, N60 and N105 were lower than that of N150 in both years.”
t0“proso millet”
Claim · model-written summary
N105 yielded less than N150 in both years.
- Taxon
- proso milletPanicum miliaceumt0
- Treatment
- N105e0
- Outcome
- yieldse0
- Direction
- lowere0
- Qualifier
- both yearse0
- Comparator
- N150e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yields generated by N0, N60 and N105 were lower than that of N150 in both years.”
t0“proso millet”
Claim · model-written summary
The developed N fertiliser regression formulae were presented as useful for choosing proso millet N rates.
- Taxon
- proso milletPanicum miliaceume0
- Outcome
- useful information about the N fertiliser ratee0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N fertiliser regression formulae developed in the study would provide useful information about the N fertiliser rate of proso millet.”
The same questions in other papers
nitrogen · physiology: photosynthesis · Panicum miliaceum (proso millet)Results agree
2 papers in the same direction as this paper
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
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.