Abstract
A greenhouse sand-culture study with two sands revealed that growth was significantly better with ammonium nitrogen, or ammonium nitrogen plus nitrate nitrogen, than with nitrate nitrogen. Roots of plants receiving NO 3 -N were dark brown or black, whereas roots of those receiving NH 4 -N or NH 4 -N + NO 3 -N were light brown. Nutrient levels in leaves and roots were significantly affected by the form of applied N. Plants receiving NH 4 -N had significantly higher leaf levels of N, P and Fe and significantly lower levels of K, Ca, Mg, Mn and Al than did plants receiving NO 3 -N. Levels in plants receiving NH 4 -N + NO 3 -N were generally intermediate. Effluent pH from NH 4 -N or NH 4 -N + NO 3 -N plants decreased during growth, but pH of effluents from NO 3 -N plants increased.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Growth of highbush blueberry was significantly better with ammonium nitrogen than with nitrate nitrogen.
- Taxon
- highbush blueberry
Vaccinium corymbosumt0 - Treatment
- ammonium nitrogene1
- Outcome
- growthe1
- Direction
- significantly bettere1
- Comparator
- nitrate nitrogene1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e1“growth was significantly better with ammonium nitrogen, or ammonium nitrogen plus nitrate nitrogen, than with nitrate nitrogen”
Claim · model-written summary
Roots of plants receiving NO3-N were dark brown or black, whereas roots receiving NH4-N were light brown.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NO 3 -Ne2
- Outcome
- dark brown or blacke2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e2“Roots of plants receiving NO 3 -N were dark brown or black, whereas roots of those receiving NH 4 -N or NH 4 -N + NO 3 -N were light brown”
Claim · model-written summary
Plants receiving NH4-N had higher leaf levels of N, P and Fe than plants receiving NO3-N.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NH 4 -Ne3
- Outcome
- leaf levels of N, P and Fee3
- Direction
- highere3
- Comparator
- NO 3 -Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e3“Plants receiving NH 4 -N had significantly higher leaf levels of N, P and Fe and significantly lower levels of K, Ca, Mg, Mn and Al than did plants receiving NO 3 -N”
Claim · model-written summary
Plants receiving NH4-N had lower leaf levels of K, Ca and Mg than plants receiving NO3-N.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NH 4 -Ne3
- Outcome
- levels of K, Ca, Mge3
- Direction
- lowere3
- Comparator
- NO 3 -Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e3“Plants receiving NH 4 -N had significantly higher leaf levels of N, P and Fe and significantly lower levels of K, Ca, Mg, Mn and Al than did plants receiving NO 3 -N”
Claim · model-written summary
Plants receiving NH4-N had lower leaf levels of Mn and Al than plants receiving NO3-N.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NH 4 -Ne3
- Outcome
- Mn and Ale3
- Direction
- lowere3
- Comparator
- NO 3 -Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e3“Plants receiving NH 4 -N had significantly higher leaf levels of N, P and Fe and significantly lower levels of K, Ca, Mg, Mn and Al than did plants receiving NO 3 -N”
Claim · model-written summary
Nutrient levels in plants receiving NH4-N plus NO3-N were generally intermediate.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NH 4 -N + NO 3 -Ne4
- Outcome
- Levelse4
- Direction
- intermediatee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e4“Levels in plants receiving NH 4 -N + NO 3 -N were generally intermediate”
Claim · model-written summary
Effluent pH decreased during growth for NH4-N or NH4-N plus NO3-N plants.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NH 4 -N or NH 4 -N + NO 3 -Ne5
- Outcome
- Effluent pHe5
- Direction
- decreasede5
- Comparator
- NO 3 -N plantse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e5“Effluent pH from NH 4 -N or NH 4 -N + NO 3 -N plants decreased during growth, but pH of effluents from NO 3 -N plants increased”
Claim · model-written summary
Effluent pH increased during growth for NO3-N plants.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- NO 3 -N plantse5
- Outcome
- pH of effluentse5
- Direction
- increasede5
- Comparator
- NH 4 -N or NH 4 -N + NO 3 -Ne5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“ON THE GROWTH OF THE HIGHBUSH BLUEBERRY”
e5“Effluent pH from NH 4 -N or NH 4 -N + NO 3 -N plants decreased during growth, but pH of effluents from NO 3 -N plants increased”
The same questions in other papers
nitrogen · growth · Vaccinium corymbosum (highbush blueberry)Positive and negative results
3 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
6 papers more in this group
See all 10 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.