Abstract
Abstract Nitrification inhibitors (NI) are sometimes recommended for use with ammoniacal fertilizers in corn ( Zea mays L.) production to improve fertilizer N use efficiency (FUE). The objectives of this experiment were to evaluate the effects of the NI nitrapyrin [2‐chloro‐6‐(trichloromethyl) pyridine] application on yield and FUE of irrigated corn, and to monitor the fate of a single application of 15 N‐enriched urea during a multiyear period in both soil and plant. Treatments included a factorial combination of two N rates (90 or 180 kg urea‐N ha −1 yr −1 ) applied during a 3‐yr period, with or without a NI and with or without incorporation, plus a zero‐N control. Twenty‐seven nonweighing lysimeters were used to quantify leaching load. Treatment effects on yield and FUE differed each year due to interactions of climate and N‐management variables. Nonincorporated urea + NI reduced grain yield when leaching load was low and increased yield at the 90 kg ha −1 N rate when leaching load was high. Maximum FUE occurred at the 90 kg ha −1 N rate when leaching load was low. The NI increased FUE only at the 90 kg ha −1 N rate when leaching load was high. Incorporation of urea + NI reduced plant recovery of fertilizer‐derived N (FDN) in the year of application, but resulted in increased uptake of residual FDN in subsequent years. Incorporation of NI with moderate N rates coupled with conservative irrigation management should reduce the risk of yield loss and minimize NO 3 movement to groundwater.
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 8
Claim · model-written summary
Treatment effects on yield and FUE differed by year with climate and nitrogen management.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- N‐management variablese0
- Outcome
- yield and FUEe0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment effects on yield and FUE differed each year due to interactions of climate and N‐management variables.”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
Nonincorporated urea with inhibitor reduced grain yield when leaching was low.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Nonincorporated urea + NIe0
- Outcome
- grain yielde0
- Direction
- reducede0
- Qualifier
- leaching load was lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nonincorporated urea + NI reduced grain yield when leaching load was low”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
Nonincorporated urea with inhibitor increased yield at the 90 kg per hectare N rate under high leaching.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Nonincorporated urea + NIe0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- 90 kg ha −1 N rate when leaching load was highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nonincorporated urea + NI reduced grain yield when leaching load was low and increased yield at the 90 kg ha −1 N rate when leaching load was high.”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
Maximum FUE occurred at 90 kg per hectare N when leaching was low.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- 90 kg ha −1 N ratee0
- Outcome
- Maximum FUEe0
- Direction
- Maximume0
- Qualifier
- leaching load was lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum FUE occurred at the 90 kg ha −1 N rate when leaching load was low.”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
Inhibitor increased FUE only at 90 kg per hectare N when leaching was high.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- NIe0
- Outcome
- FUEe0
- Direction
- increasede0
- Qualifier
- only at the 90 kg ha −1 N rate when leaching load was highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The NI increased FUE only at the 90 kg ha −1 N rate when leaching load was high.”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
Incorporated urea with inhibitor reduced fertilizer nitrogen recovery in the application year.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Incorporation of urea + NIe0
- Outcome
- plant recovery of fertilizer‐derived N (FDN)e0
- Direction
- reducede0
- Qualifier
- in the year of applicatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incorporation of urea + NI reduced plant recovery of fertilizer‐derived N (FDN) in the year of application”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
Incorporated urea with inhibitor increased uptake of residual fertilizer nitrogen in subsequent years.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Incorporation of urea + NIe0
- Outcome
- uptake of residual FDNe0
- Direction
- increasede0
- Qualifier
- in subsequent yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incorporation of urea + NI reduced plant recovery of fertilizer‐derived N (FDN) in the year of application, but resulted in increased uptake of residual FDN in subsequent years.”
e1“corn ( Zea mays L.) production”
Claim · model-written summary
The authors recommend inhibitor incorporation at moderate N rates with conservative irrigation to limit yield loss and nitrate movement.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- Incorporation of NI with moderate N rates coupled with conservative irrigation managemente0
- Outcome
- reduce the risk of yield loss and minimize NO 3 movement to groundwatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incorporation of NI with moderate N rates coupled with conservative irrigation management should reduce the risk of yield loss and minimize NO 3 movement to groundwater.”
e1“corn ( Zea mays L.) production”
The same questions in other papers
nitrification inhibitor · nutrient: content · Zea mays (maize)Positive and negative results
9 papers in the same direction as this paper · 4 in the opposite direction
- negative
- no effect
- no effect
10 papers more in this group
See all 14 papers →nitrification inhibitor · yield · Zea mays (maize)Positive and negative results
30 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
36 papers more in this group
See all 40 papers →nitrification inhibitor · nutrient: efficiency · Zea mays (maize)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →nitrogen · nutrient: content · Zea mays (maize)Positive and negative results
402 papers in the same direction as this paper · 83 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- no effect
485 papers more in this group
See all 489 papers →nitrogen · yield · Zea mays (maize)Positive and negative results
1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative
- positive
- positive
- negative
2,181 papers more in this group
See all 2,185 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.