Abstract
A 15N-labelled experiment was carried out to study the effects of nitrogen rate and ratio of base fertilizer to topdressing on grain yield,quality,fertilizer-N use efficiency(FNUE) of strong gluten wheat(Triticum aestivum L.) under high-yield condition.The study used 15N isotope tracer in PVC cylinders(2.05 m length,Ф0.2 m,without bottom)with seven treatments,without applying N fertilizer(N0);N application rate of 168 kg/hm2(0.527 g/pot),ratios of base fertilizer to topdressing of 1∶1(N1),1∶2(N2) and 0∶1(N3);N application rate of 240 kg/hm2(0.753 g/pot),ratios of base fertilizer to topdressing of 1∶1(N4),1∶2(N5) and 0∶1(N6).The results showed that the amount of N accumulation in plant have no significant difference between treatments with applying nitrogen fertilizer.Fertilizer-N use efficiency(FNUE) of topdressing was markedly higher than that of basal nitrogen;reducing basal nitrogen amount and increasing topdressing nitrogen amount could appropriately enhance FNUE,of which treatment N2 was the highest.Appropriate N fertilizer rate with reducing basal nitrogen amount and increasing topdressing nitrogen amount such as in N2,N5 and N6 increased grain yield,protein content and improved grain processing quality.In conclusion,under the condition of this experiment,as grain yield,quality and fertilizer-N use efficiency were concerned,the most appropriate nitrogen fertilizer applying regime recommended is treatment N2 with nitrogen fertilizer rate of 168 kg/hm2 and ratio of base fertilizer to topdressing of 1∶2.
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Claims 8
Claim · model-written summary
Plant nitrogen accumulation did not differ significantly among nitrogen fertilizer treatments.
- Treatment
- applying nitrogen fertilizere0
- Outcome
- N accumulatione0
- Direction
- no significant differencee0
- Comparator
- treatmentse0
Not reportedTaxon
Verbatim
e0“the amount of N accumulation in plant have no significant difference between treatments with applying nitrogen fertilizer”
Claim · model-written summary
Topdressing had higher fertilizer nitrogen use efficiency than basal nitrogen.
- Treatment
- topdressinge0
- Outcome
- Fertilizer-N use efficiency(FNUE)e0
- Direction
- markedly highere0
- Comparator
- basal nitrogene0
Not reportedTaxon
Verbatim
e0“Fertilizer-N use efficiency(FNUE) of topdressing was markedly higher than that of basal nitrogen”
Claim · model-written summary
Reducing basal nitrogen while increasing topdressing nitrogen enhanced fertilizer nitrogen use efficiency.
- Treatment
- reducing basal nitrogen amount and increasing topdressing nitrogen amounte0
- Outcome
- FNUEe0
- Direction
- enhancee0
Not reportedTaxonComparator
Verbatim
e0“reducing basal nitrogen amount and increasing topdressing nitrogen amount could appropriately enhance FNUE”
Claim · model-written summary
N2 had the highest fertilizer nitrogen use efficiency.
Not reportedTaxon
Verbatim
e0“of which treatment N2 was the highest”
Claim · model-written summary
Treatments N2, N5 and N6 increased wheat grain yield.
Not reportedTaxonComparator
Verbatim
e0“Appropriate N fertilizer rate with reducing basal nitrogen amount and increasing topdressing nitrogen amount such as in N2,N5 and N6 increased grain yield,protein content and improved grain processing quality.”
Claim · model-written summary
Treatments N2, N5 and N6 increased wheat grain protein content.
Not reportedTaxonComparator
Verbatim
e0“Appropriate N fertilizer rate with reducing basal nitrogen amount and increasing topdressing nitrogen amount such as in N2,N5 and N6 increased grain yield,protein content and improved grain processing quality.”
Claim · model-written summary
Treatments N2, N5 and N6 improved grain processing quality.
Not reportedTaxonComparator
Verbatim
e0“Appropriate N fertilizer rate with reducing basal nitrogen amount and increasing topdressing nitrogen amount such as in N2,N5 and N6 increased grain yield,protein content and improved grain processing quality.”
Claim · model-written summary
The authors recommended N2 at 168 kg/hm2 and a 1∶2 base to topdressing ratio.
- Outcome
- treatment N2 with nitrogen fertilizer rate of 168 kg/hm2 and ratio of base fertilizer to topdressing of 1∶2e0
Not reportedTaxon
Verbatim
e0“the most appropriate nitrogen fertilizer applying regime recommended is treatment N2 with nitrogen fertilizer rate of 168 kg/hm2 and ratio of base fertilizer to topdressing of 1∶2”