Abstract
Abstract Intensive vegetable cropping systems rely heavily on nitrogen (N) inputs from multiple synthetic and organic fertilizer applications. The majority of applied N is lost to the environment through numerous pathways, including as nitrous oxide (N 2 O). A field trial was conducted to examine the opportunities to reduce N input in an intensive vegetable system without compromising yield. Treatments applied were control (no N), manure (M, 408 kg N ha –1 from chicken manure), grower practice (GP, 408 kg N ha –1 from chicken manure + 195 kg N ha –1 from fertilizer), and 2/3 GP (two‐thirds of the total N input in GP), all with and without 3,4‐dimethylpyrazole phosphate (DMPP). Nitrogen recovery in the GP treatment was determined using 15 N‐labeled fertilizer. Using only manure significantly lowered celery ( Apium graveolens L.) yield and apparent N use efficiency (ANUE) compared with GP. Reducing N input by one‐third did not affect yield or ANUE. Use of DMPP increased ANUE despite no yield improvement. More than 50% of the applied N in the GP treatment was lost to the environment, with almost 10 kg N ha –1 emitted as N 2 O over the season, which was 67 times more than from the control. Reducing the N input by one‐third or using manure only reduced N 2 O emissions by more than 70% relative to GP. This study shows that there is a clear opportunity to reduce N input and N 2 O emissions in high‐fertilizer‐input vegetable systems without compromising vegetable yield.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
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 11
Claim · model-written summary
Manure alone significantly lowered celery yield versus grower practice.
- Taxon
- celery
%2C_Elswick%2C_Northumberland_4.jpg?width=60)
Apium graveolens Dulce Groupe0 - Treatment
- manuree0
- Outcome
- yielde0
- Direction
- lowerede0
- Comparator
- GPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
%2C_Elswick%2C_Northumberland_4.jpg?width=500)
Verbatim
e0“Using only manure significantly lowered celery ( Apium graveolens L.) yield and apparent N use efficiency (ANUE) compared with GP”
Claim · model-written summary
Manure alone significantly lowered apparent nitrogen use efficiency versus grower practice.
- Taxon
- celeryApium graveolens Dulce Groupe0
- Treatment
- manuree0
- Outcome
- apparent N use efficiency (ANUE)e0
- Direction
- lowerede0
- Comparator
- GPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Using only manure significantly lowered celery ( Apium graveolens L.) yield and apparent N use efficiency (ANUE) compared with GP”
Claim · model-written summary
Reducing nitrogen input by one-third did not affect yield.
Not reportedTaxonComparator
Verbatim
e0“Reducing N input by one‐third did not affect yield or ANUE”
Claim · model-written summary
Reducing nitrogen input by one-third did not affect ANUE.
Not reportedTaxonComparator
Verbatim
e0“Reducing N input by one‐third did not affect yield or ANUE”
Claim · model-written summary
DMPP increased apparent nitrogen use efficiency.
Not reportedTaxonComparator
Verbatim
e0“Use of DMPP increased ANUE despite no yield improvement”
Claim · model-written summary
DMPP did not improve yield.
Not reportedTaxonComparator
Verbatim
e0“Use of DMPP increased ANUE despite no yield improvement”
Claim · model-written summary
More than 50% of applied N was lost in grower practice.
Not reportedTaxon
Verbatim
e0“More than 50% of the applied N in the GP treatment was lost to the environment”
Claim · model-written summary
GP emitted almost 10 kg N ha –1 as N 2 O over the season, 67 times the control.
Not reportedTaxon
Verbatim
e0“almost 10 kg N ha –1 emitted as N 2 O over the season, which was 67 times more than from the control”
Claim · model-written summary
Reducing N input by one-third cut N 2 O emissions by more than 70% relative to GP.
- Treatment
- Reducing the N input by one‐thirde0
- Outcome
- N 2 O emissionse0
- Direction
- reducede0
- Value
- more than 70%e0
- Comparator
- GPe0
Not reportedTaxon
Verbatim
e0“Reducing the N input by one‐third or using manure only reduced N 2 O emissions by more than 70% relative to GP”
Claim · model-written summary
Using manure only cut N 2 O emissions by more than 70% relative to GP.
- Treatment
- using manure onlye0
- Outcome
- N 2 O emissionse0
- Direction
- reducede0
- Value
- more than 70%e0
- Comparator
- GPe0
Not reportedTaxon
Verbatim
e0“Reducing the N input by one‐third or using manure only reduced N 2 O emissions by more than 70% relative to GP”
Claim · model-written summary
The authors conclude that high-input vegetable systems can reduce N inputs and N 2 O emissions without losing yield.
- Outcome
- reduce N input and N 2 O emissions in high‐fertilizer‐input vegetable systems without compromising vegetable yielde0
Not reportedTaxon
Verbatim
e0“there is a clear opportunity to reduce N input and N 2 O emissions in high‐fertilizer‐input vegetable systems without compromising vegetable yield”
The same questions in other papers
fertilization · nutrient: efficiency · Apium graveolensPositive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →fertilization · yield · Apium graveolensPositive and negative results
4 papers in the same direction as this paper · 31 in the opposite direction
- positive
- positive
- positive
32 papers more in this group
See all 36 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.