Abstract
Young rice plants cv. IR-5 in flooded sand culture grew better with ammonium than with nitrate as N source; yield differences were initiated by a higher rate of tillering and leaf expansion with ammonium nutrition during the first stage of exponential growth. When complete foliage cover had been obtained and further DM increases were linearly related to growth duration, nitrate was less readily assimilated than ammonium, but growth rate was the same for both forms of N because it was controlled mainly by environment and nutrient supply rather than by leaf area, form of available N or concentration of N in the tissues. Restoration of N supply to an N-depleted culture of well-developed plants showed that ammonium produced an earlier renewal of growth; plants yielded more on a given date than with nitrate although they eventually regained the same rate of linear growth. Plants given nitrate contained more carboxylates than those given ammonium, irrespective of plant age or temporary N shortage. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 8
Claim · model-written summary
Young rice plants grew better with ammonium than with nitrate as N source
- Taxon
- rice
Oryza sativae1 - Material
- IR-5e1
- Treatment
- ammoniume1
- Outcome
- grew bettere1
- Direction
- bettere1
- Comparator
- nitratee1
- Setting
- flooded sand culturee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Young rice plants cv. IR-5 in flooded sand culture grew better with ammonium than with nitrate as N source”
Claim · model-written summary
Ammonium nutrition gave a higher rate of tillering and leaf expansion in the first stage of exponential growth, initiating yield differences
- Taxon
- riceOryza sativat0
- Treatment
- ammonium nutritione2
- Outcome
- rate of tillering and leaf expansione2
- Direction
- highere2
- Qualifier
- during the first stage of exponential growthe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“yield differences were initiated by a higher rate of tillering and leaf expansion with ammonium nutrition during the first stage of exponential growth”
t0“Nitrogen nutrition of rice plants”
Claim · model-written summary
Nitrate was less readily assimilated than ammonium once complete foliage cover was obtained
- Taxon
- riceOryza sativat0
- Treatment
- nitratee3
- Outcome
- assimilatede3
- Direction
- less readilye3
- Qualifier
- When complete foliage cover had been obtainede3
- Comparator
- ammoniume3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“When complete foliage cover had been obtained and further DM increases were linearly related to growth duration, nitrate was less readily assimilated than ammonium”
t0“Nitrogen nutrition of rice plants”
Claim · model-written summary
Growth rate was the same for both forms of N, controlled mainly by environment and nutrient supply
- Taxon
- riceOryza sativat0
- Treatment
- both forms of Ne4
- Outcome
- growth ratee4
- Direction
- the samee4
- Qualifier
- controlled mainly by environment and nutrient supply rather than by leaf areae4
- Comparator
- nitratee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“nitrate was less readily assimilated than ammonium”
e4“growth rate was the same for both forms of N because it was controlled mainly by environment and nutrient supply rather than by leaf area”
t0“Nitrogen nutrition of rice plants”
Claim · model-written summary
Restoring N supply to N-depleted rice produced an earlier renewal of growth with ammonium
- Taxon
- riceOryza sativat0
- Organ / stage
- well-developed plantse5
- Treatment
- Restoration of N supplye5
- Outcome
- renewal of growthe5
- Direction
- earliere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Restoration of N supply to an N-depleted culture of well-developed plants showed that ammonium produced an earlier renewal of growth; plants yielded more on a given date than with nitrate although they eventually regained the same rate of linear growth”
t0“Nitrogen nutrition of rice plants”
Claim · model-written summary
After restoring N supply, rice yielded more on a given date with ammonium than with nitrate
- Taxon
- riceOryza sativat0
- Treatment
- Restoration of N supplye5
- Outcome
- yieldede5
- Direction
- moree5
- Qualifier
- on a given datee5
- Comparator
- nitratee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Restoration of N supply to an N-depleted culture of well-developed plants showed that ammonium produced an earlier renewal of growth; plants yielded more on a given date than with nitrate although they eventually regained the same rate of linear growth”
t0“Nitrogen nutrition of rice plants”
Claim · model-written summary
Rice eventually regained the same rate of linear growth after N restoration with either form of N
- Taxon
- riceOryza sativat0
- Treatment
- Restoration of N supplye5
- Outcome
- rate of linear growthe5
- Direction
- the samee5
- Qualifier
- eventually regainede5
- Comparator
- nitratee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Restoration of N supply to an N-depleted culture of well-developed plants showed that ammonium produced an earlier renewal of growth; plants yielded more on a given date than with nitrate although they eventually regained the same rate of linear growth”
t0“Nitrogen nutrition of rice plants”
Claim · model-written summary
Plants given nitrate contained more carboxylates than plants given ammonium, irrespective of plant age or temporary N shortage
- Taxon
- riceOryza sativat0
- Treatment
- nitratee6
- Outcome
- carboxylatese6
- Direction
- moree6
- Qualifier
- irrespective of plant age or temporary N shortagee6
- Comparator
- ammoniume6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Plants given nitrate contained more carboxylates than those given ammonium, irrespective of plant age or temporary N shortage”
t0“Nitrogen nutrition of rice plants”
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- no effect
- negative
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1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
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See all 2,045 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.