Abstract
Inhibitors of urease and ammonia monooxygenase can limit the rate of conversion of urea to ammonia and ammonia to nitrate, respectively, potentially improving N fertilizer use efficiency and reducing gaseous losses. Winter wheat grown on a sandy soil in the UK was treated with urea fertilizer with the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT), the nitrification inhibitor dicyandiamide (DCD) or a combination of both. The effects on soil microbial community diversity, the abundance of genes involved in nitrification and crop yields and net N recovery were compared. The only significant effect on N-cycle genes was a transient reduction in bacterial ammonia monooxygenase abundance following DCD application. However, overall crop yields and net N recovery were significantly lower in the urea treatments compared with an equivalent application of ammonium nitrate fertilizer, and significantly less for urea with DCD than the other urea treatments.
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Claims 3
Claim · model-written summary
DCD application transiently reduced bacterial ammonia monooxygenase abundance in the soil under winter wheat.
- Taxon
- Winter wheat
Triticum aestivume1 - Treatment
- DCD applicatione2
- Outcome
- bacterial ammonia monooxygenase abundancee2
- Direction
- reductione2
- Qualifier
- transiente2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Winter wheat grown on a sandy soil in the UK”
e2“The only significant effect on N-cycle genes was a transient reduction in bacterial ammonia monooxygenase abundance following DCD application”
Claim · model-written summary
Urea treatments gave significantly lower crop yields and net N recovery than an equivalent application of ammonium nitrate fertilizer in winter wheat.
- Taxon
- Winter wheatTriticum aestivume1
- Treatment
- urea treatmentse3
- Outcome
- crop yields and net N recoverye3
- Direction
- lowere3
- Comparator
- ammonium nitrate fertilizere3
- Setting
- sandy soil in the UKe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Winter wheat grown on a sandy soil in the UK”
e3“overall crop yields and net N recovery were significantly lower in the urea treatments compared with an equivalent application of ammonium nitrate fertilizer, and significantly less for urea with DCD than the other urea treatments”
Claim · model-written summary
Urea with DCD gave significantly lower crop yields and net N recovery than the other urea treatments in winter wheat.
- Taxon
- Winter wheatTriticum aestivume1
- Treatment
- urea with DCDe3
- Outcome
- crop yields and net N recoverye3
- Direction
- lesse3
- Comparator
- other urea treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Winter wheat grown on a sandy soil in the UK”
e3“overall crop yields and net N recovery were significantly lower in the urea treatments compared with an equivalent application of ammonium nitrate fertilizer, and significantly less for urea with DCD than the other urea treatments”
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