Abstract
Use of nitrification inhibitors (NI) in agricultural production systems is considered a risk management strategy for both agricultural and environmental considerations. It can be utilized when risk of reduced nitrogen (N) fertilizer use efficiency or yield, and risk of pollution from mineral N is high which can occur in poorly-drained soils that are vulnerable to waterlogging and runoff. Field research was conducted on corn (Zea mays L.) from 2012 to 2015 in Missouri, USA on a poorly-drained claypan soil. Treatments consisted of two application timings of urea ammonium nitrate (UAN) fertilizer solution [pre-emergence (PRE) and V3 growth stage], two application rates (143 and 168 kg N ha-1) in the presence or absence of nitrapyrin, and a non-treated control. UAN at 143 kg ha-1 with nitrapyrin at the V3 growth stage resulted in the highest yield (8.6 Mg ha-1). Similarly, pre-emergence application of UAN 168 kg ha-1 with nitrapyrin resulted in greater yields (7.7 Mg ha-1). UAN application rates and timings affected soil NO3-N and NH4-N concentrations more than the presence or absence of nitrapyrin during the growing season. A side-dress application of a lower rate of UAN with nitrapyrin at V3 was effective in poorly-drained soils when risk of N losses during the growing season due to unfavorable precipitation events and other environmental variables was high. A pre-emergence application of UAN with nitrapyrin was also effective and it may eliminate the need for split-application of N fertilizer later in the season thereby reducing the workload on growers during the growing season.
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Claims 5
Claim · model-written summary
UAN at 143 kg ha-1 with nitrapyrin at V3 produced the highest corn yield, 8.6 Mg ha-1.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- UAN at 143 kg ha-1 with nitrapyrin at the V3 growth stagee0
- Outcome
- yielde0
- Direction
- higheste0
- Value
- 8.6 Mg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UAN at 143 kg ha-1 with nitrapyrin at the V3 growth stage resulted in the highest yield (8.6 Mg ha-1)”
t0“Corn”
Claim · model-written summary
Pre-emergence UAN at 168 kg ha-1 with nitrapyrin gave greater corn yield of 7.7 Mg ha-1.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- pre-emergence application of UAN 168 kg ha-1 with nitrapyrine0
- Outcome
- yieldse0
- Direction
- greatere0
- Value
- 7.7 Mg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pre-emergence application of UAN 168 kg ha-1 with nitrapyrin resulted in greater yields (7.7 Mg ha-1)”
t0“Corn”
Claim · model-written summary
UAN application rate and timing affected soil NO3-N and NH4-N concentrations more than nitrapyrin presence.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- UAN application rates and timingse0
- Outcome
- soil NO3-N and NH4-N concentrationse0
- Direction
- more thane0
- Comparator
- presence or absence of nitrapyrine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“UAN application rates and timings affected soil NO3-N and NH4-N concentrations more than the presence or absence of nitrapyrin during the growing season”
t0“Corn”
Claim · model-written summary
Side-dressed lower-rate UAN with nitrapyrin at V3 was effective in poorly drained soils when nitrogen-loss risk was high.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- side-dress application of a lower rate of UAN with nitrapyrin at V3 was effectivee0
- Qualifier
- poorly-drained soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A side-dress application of a lower rate of UAN with nitrapyrin at V3 was effective in poorly-drained soils when risk of N losses during the growing season due to unfavorable precipitation events and other environmental variables was high”
t0“Corn”
Claim · model-written summary
Pre-emergence UAN with nitrapyrin was effective and may eliminate later split application.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- pre-emergence application of UAN with nitrapyrin was also effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pre-emergence application of UAN with nitrapyrin was also effective and it may eliminate the need for split-application of N fertilizer later in the season”
t0“Corn”
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