Abstract
Studies from various countries show that topdressing with nitrogen fertilizer can effectively increase winter wheat grain yields. However, information on its effects on wheat yields on the Loess Plateau in China is scarce. Thus, we investigated yields, N concentration and uptake, nitrogen use efficiency (NUE), and partial factor productivity of nitrogen (PFPN) of winter wheat at a site on the Plateau in three consecutive years following four treatments: no N application; 150 kg N ha−1 and 46 kg P ha−1 applied as base dressing; 198 kg N ha−1 and 46 kg P ha−1 applied as base dressing; and 150 kg N ha−1 and 46 kg P ha−1 applied as base dressing + 48 kg N ha−1 applied as topdressing in the spring. Topdressing with N fertilizer resulted in significant increases in wheat yield, wheat biomass production, and N concentrations and uptake in wheat grain, straw, and chaff. PFPN was 6.9%, 15.2%, and 5.5% higher, and NUE 28.1%, 31.6%, and 12.5% higher, in the three years with top dressing than with base dressing alone. Topdressing N fertilizer for winter wheat is recommended on the Loess Plateau.
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Claims 7
Claim · model-written summary
N topdressing significantly increased wheat yield.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Topdressing with N fertilizere0
- Outcome
- wheat yielde0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing with N fertilizer resulted in significant increases in wheat yield, wheat biomass production, and N concentrations and uptake in wheat grain, straw, and chaff.”
Claim · model-written summary
N topdressing significantly increased wheat biomass production.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Topdressing with N fertilizere0
- Outcome
- wheat biomass productione0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing with N fertilizer resulted in significant increases in wheat yield, wheat biomass production, and N concentrations and uptake in wheat grain, straw, and chaff.”
Claim · model-written summary
N topdressing significantly increased N concentrations in grain, straw and chaff.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- wheat grain, straw, and chaffe0
- Treatment
- Topdressing with N fertilizere0
- Outcome
- N concentrationse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing with N fertilizer resulted in significant increases in wheat yield, wheat biomass production, and N concentrations and uptake in wheat grain, straw, and chaff.”
Claim · model-written summary
N topdressing significantly increased N uptake in grain, straw and chaff.
- Taxon
- wheatTriticum aestivume0
- Organ / stage
- wheat grain, straw, and chaffe0
- Treatment
- Topdressing with N fertilizere0
- Outcome
- uptakee0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing with N fertilizer resulted in significant increases in wheat yield, wheat biomass production, and N concentrations and uptake in wheat grain, straw, and chaff.”
Claim · model-written summary
PFPN was higher by 6.9%, 15.2% and 5.5% across three years with topdressing.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- top dressinge0
- Outcome
- PFPNe0
- Direction
- highere0
- Value
- 6.9%, 15.2%, and 5.5%e0
- Comparator
- base dressing alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PFPN was 6.9%, 15.2%, and 5.5% higher, and NUE 28.1%, 31.6%, and 12.5% higher, in the three years with top dressing than with base dressing alone.”
t0“wheat”
Claim · model-written summary
NUE was higher by 28.1%, 31.6% and 12.5% across three years with topdressing.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- top dressinge0
- Outcome
- NUEe0
- Direction
- highere0
- Value
- 28.1%, 31.6%, and 12.5%e0
- Comparator
- base dressing alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PFPN was 6.9%, 15.2%, and 5.5% higher, and NUE 28.1%, 31.6%, and 12.5% higher, in the three years with top dressing than with base dressing alone.”
t0“wheat”
Claim · model-written summary
The authors recommend topdressing N fertilizer for winter wheat on the Loess Plateau.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- Topdressing N fertilizere0
- Setting
- Loess Plateaue0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Topdressing N fertilizer for winter wheat is recommended on the Loess Plateau.”
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