Abstract
Two early indica rice cultivars of Xiangliangyou 68 and Zaoxian 65 were used to study nitrogen uptake,utilization,yield and yield components as affected by different split N application strategies when the total nitrogen application amount was 150 kg/ha in the north rimland of double-cropping rice.Results showed that reducing N application before transplanting and at tillering stage but increasing N application at booting stage could increase rice yield and nitrogen uptake and utilization,by increasing leaf nitrogen content and SPAD in top 3 leaves during heading stage to mature stage,and increasing LAI and effective leaf area percentage.When nitrogen fertilizer was applied before transplanting(50%),tillering(25%),booting (25%),both hybrid and conventional rice cultivars had highest yield.The main benefit of postponing N fertilizer application time on yield formation was related to its improved splitting and timing of fertilizer N applications leading to a more balanced supply of N nutrition for rice growth than the common fertilizer practice,and to increase total amount of N-absorption(ANA).Nitrogen fertilizer use efficiency(NUE) increased with the percentage of panicle fertilizer,but the agronomic use efficiency of N fertilizer had better relationship with yield. It is concluded that the split application of N before transplanting(50%),at tillering stage(25%) and at booting stage(25%) is a rational N application strategy in the north rimland of double-cropping rice.
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Claims 8
Claim · model-written summary
Postponing nitrogen from transplanting and tillering to booting increased rice yield.
- Taxon
- rice
Oryza sativae0 - Treatment
- reducing N application before transplanting and at tillering stage but increasing N application at booting stagee0
- Outcome
- rice yielde0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing N application before transplanting and at tillering stage but increasing N application at booting stage could increase rice yield”
Claim · model-written summary
Postponing nitrogen increased rice nitrogen uptake and utilization.
- Taxon
- riceOryza sativae0
- Treatment
- increasing N application at booting stagee0
- Outcome
- nitrogen uptake and utilizatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing N application at booting stage could increase rice yield and nitrogen uptake and utilization”
Claim · model-written summary
Postponing nitrogen increased leaf nitrogen content and SPAD in top leaves from heading to maturity.
- Taxon
- riceOryza sativat0
- Organ / stage
- top 3 leaves during heading stage to mature stagee0
- Treatment
- increasing N application at booting stagee1
- Outcome
- leaf nitrogen content and SPADe0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing leaf nitrogen content and SPAD in top 3 leaves during heading stage to mature stage”
e1“reducing N application before transplanting and at tillering stage but increasing N application at booting stage could increase rice yield and nitrogen uptake and utilization,by increasing leaf nitrogen content and SPAD in top 3 leaves during heading stage to mature stage,and increasing LAI and effective leaf area percentage”
t0“rice yield in the north rimland”
Claim · model-written summary
Postponing nitrogen increased rice LAI and effective leaf area percentage.
- Taxon
- riceOryza sativat0
- Treatment
- increasing N application at booting stagee1
- Outcome
- LAI and effective leaf area percentagee0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing LAI and effective leaf area percentage”
e1“reducing N application before transplanting and at tillering stage but increasing N application at booting stage could increase rice yield and nitrogen uptake and utilization,by increasing leaf nitrogen content and SPAD in top 3 leaves during heading stage to mature stage,and increasing LAI and effective leaf area percentage”
t0“rice yield in the north rimland”
Claim · model-written summary
A 50%, 25%, 25% split at transplanting, tillering, and booting gave highest yield in hybrid and conventional rice.
- Taxon
- riceOryza sativae0
- Treatment
- before transplanting(50%),tillering(25%),booting (25%)e0
- Outcome
- yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilizer was applied before transplanting(50%),tillering(25%),booting (25%),both hybrid and conventional rice cultivars had highest yield”
Claim · model-written summary
Nitrogen fertilizer use efficiency increased with the panicle fertilizer percentage.
- Taxon
- riceOryza sativat0
- Treatment
- percentage of panicle fertilizere0
- Outcome
- Nitrogen fertilizer use efficiency(NUE)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilizer use efficiency(NUE) increased with the percentage of panicle fertilizer”
t0“rice yield in the north rimland”
Claim · model-written summary
Agronomic nitrogen use efficiency had a stronger relationship with yield.
- Taxon
- riceOryza sativat0
- Outcome
- agronomic use efficiency of N fertilizere0
- Direction
- bettere0
- Comparator
- yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the agronomic use efficiency of N fertilizer had better relationship with yield”
t0“rice yield in the north rimland”
Claim · model-written summary
The authors recommended a 50%, 25%, 25% nitrogen split for this rice region.
- Taxon
- riceOryza sativae0
- Outcome
- split application of N before transplanting(50%),at tillering stage(25%) and at booting stage(25%)e0
- Setting
- north rimland of double-cropping ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the split application of N before transplanting(50%),at tillering stage(25%) and at booting stage(25%) is a rational N application strategy in the north rimland of double-cropping rice”
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