Abstract
Abstract The effect of nitrapyrin on the fate of fertilizer nitrogen (N) applied to soil needs further investigation. Our objective was to determine the effect of nitrapyrin under two different leaching regimes on the fate of ammonium sulfate‐nitrogen [(NH4)2SO4‐N] added to the soil, namely corn N uptake, denitrification, nitrate leaching and soil residual N. A Nunn sandy clay loam soil (fine, montmorillonitic, mesic, aridic, argiustoll), low in residual inorganic N was used. Nitrogen‐15 enriched (NH4)2SO4 (5 atom% N‐15) was applied at five rates (0, 50, 100, 200, and 400 mg/kg), nitrapyrin at three rates 0, 1.3, and 2.6 μL/kg (0, 2.36, and 4.72 L/ha) and leaching at two rates (0 and 1000 mL over field capacity in two 500‐mL increments at 3 and 6 weeks after planting) in a complete factorial arrangement with three replications. Corn (Zea mays L.) seeds were planted in pots (2 kg soil/pot) and allowed to grow for 80 days in a greenhouse. The atom% N‐15 values were determined in plant tops, leachates and soil samples using a mass spectrometer. The results showed that N fertilizer increased dry matter production, plant N concentration, leaching of nitrates and denitrification significantly. The effect of nitrapyrin on yield was not statistically significant, but, it at a rate equivalent to 4.72 L/ha reduced denitrification and nitrate (NO3) leaching and increased N uptake efficiency. Application of 4.72 L/ha of nitrapyrin versus control showed the following results respectively, N uptake: 46.3 versus 39.6%, denitrification: 26.3 versus 35.3% and NO3 leaching: 2.7 vesus 6.7% of fertilizer N‐15. Nitrapyrin increased soil residual fertilizer N‐15 in organic matter and roots. The result of this study show that application of nitrapyrin at an adequate rate decreases denitrification and NO3 leaching and increases N uptake efficiency.
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Claims 9
Claim · model-written summary
N fertilizer significantly increased corn dry matter production.
- Taxon
- Corn
Zea mays subsp. mayse1 - Treatment
- N fertilizere0
- Outcome
- dry matter productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer increased dry matter production, plant N concentration, leaching of nitrates and denitrification significantly.”
e1“Corn (Zea mays L.) seeds”
Claim · model-written summary
N fertilizer significantly increased plant N concentration.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- N fertilizere0
- Outcome
- plant N concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer increased dry matter production, plant N concentration, leaching of nitrates and denitrification significantly.”
e1“Corn (Zea mays L.) seeds”
Claim · model-written summary
N fertilizer significantly increased nitrate leaching.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- N fertilizere0
- Outcome
- leaching of nitratese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer increased dry matter production, plant N concentration, leaching of nitrates and denitrification significantly.”
e1“Corn (Zea mays L.) seeds”
Claim · model-written summary
N fertilizer significantly increased denitrification.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- N fertilizere0
- Outcome
- denitrificatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N fertilizer increased dry matter production, plant N concentration, leaching of nitrates and denitrification significantly.”
e1“Corn (Zea mays L.) seeds”
Claim · model-written summary
Nitrapyrin had no statistically significant effect on yield.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- nitrapyrine0
- Outcome
- yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of nitrapyrin on yield was not statistically significant”
e1“Corn (Zea mays L.) seeds”
Claim · model-written summary
Nitrapyrin at 4.72 L/ha increased N uptake efficiency to 46.3% versus 39.6% in control.
- Taxon
- CornZea mays subsp. mayse3
- Treatment
- 4.72 L/ha of nitrapyrine2
- Outcome
- N uptake efficiencye0
- Direction
- increasede0
- Value
- 46.3e1
- Qualifier
- 39.6%e1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it at a rate equivalent to 4.72 L/ha reduced denitrification and nitrate (NO3) leaching and increased N uptake efficiency.”
e1“N uptake: 46.3 versus 39.6%”
e2“Application of 4.72 L/ha of nitrapyrin versus control”
e3“Corn (Zea mays L.) seeds”
Claim · model-written summary
Nitrapyrin at 4.72 L/ha reduced denitrification to 26.3% versus 35.3% in control.
- Taxon
- CornZea mays subsp. mayse3
- Treatment
- 4.72 L/ha of nitrapyrine2
- Outcome
- denitrificatione0
- Direction
- reducede0
- Value
- 26.3e1
- Qualifier
- 35.3%e1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it at a rate equivalent to 4.72 L/ha reduced denitrification and nitrate (NO3) leaching and increased N uptake efficiency.”
e1“denitrification: 26.3 versus 35.3%”
e2“Application of 4.72 L/ha of nitrapyrin versus control”
e3“Corn (Zea mays L.) seeds”
Claim · model-written summary
Nitrapyrin at 4.72 L/ha reduced NO3 leaching to 2.7% versus 6.7% in control.
- Taxon
- CornZea mays subsp. mayse3
- Treatment
- 4.72 L/ha of nitrapyrine2
- Outcome
- NO3 leachinge1
- Direction
- reducede0
- Value
- 2.7e1
- Qualifier
- 6.7% of fertilizer N‐15e1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it at a rate equivalent to 4.72 L/ha reduced denitrification and nitrate (NO3) leaching and increased N uptake efficiency.”
e1“NO3 leaching: 2.7 vesus 6.7% of fertilizer N‐15”
e2“Application of 4.72 L/ha of nitrapyrin versus control”
e3“Corn (Zea mays L.) seeds”
Claim · model-written summary
Nitrapyrin increased residual fertilizer N‐15 in soil organic matter and roots.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- Nitrapyrine0
- Outcome
- soil residual fertilizer N‐15 in organic matter and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrapyrin increased soil residual fertilizer N‐15 in organic matter and roots.”
e1“Corn (Zea mays L.) seeds”
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