Abstract
Yield and quality of late rice and nitrogen-use efficiency were investigated by applying nitrogen with different ratios of basal,tiller fertilizer and panicle fertilizer under the same soil and nitrogen application condition.Postponing nitrogen fertilization could appropriately maintain suitable NH4+-N concentration and promote the growth of late rice,resulting in good yield,dry matter and nitrogen accumulation;When nitrogen application as basal fertilizer accounted for 53.8%,the rice yield amounted to maximum.Meanwhile,the milling quality became better with the increasing panicle fertilizer ratio,while the appearance quality and cooking quality became worse.Moreover,postponing nitrogen fertilization could appropriately improve the nitrogen-use efficiency.When nitrogen application as basal fertilizer accounted for 40.3%,the N-uptake of late rice and nitrogen-use efficiency amounted to maximum.Besides the soil N dependency showed parabolic curve relationship with the basal fertilizer ratio.And the minimum soil N dependency was 54.5% when the ratio accounted for 40.0%,however,the nitrogen harvest index and the N-requirement per 100 kg grain increased with the decreasing nitrogen application as basal fertilizer.Therefore,the best nitrogen application ratios,as the basal fertilizer,tiller fertilizer and panicle fertilizer were 40%-50%,20%-30% and 20%-30% respectively.
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Claims 14
Claim · model-written summary
Postponed nitrogen fertilization maintained suitable NH4+-N concentration.
- Taxon
- late ricet0
- Treatment
- Postponing nitrogen fertilizatione0
- Outcome
- NH4+-N concentratione0
- Direction
- maintaine0
Not reportedComparator
Verbatim
e0“Postponing nitrogen fertilization could appropriately maintain suitable NH4+-N concentration”
t0“Late Rice”
Claim · model-written summary
Postponed fertilization promoted late rice growth, yield, dry matter and nitrogen accumulation.
- Taxon
- late ricee0
- Treatment
- Postponing nitrogen fertilizatione1
- Outcome
- growth of late rice,resulting in good yield,dry matter and nitrogen accumulatione0
- Direction
- promotee0
Not reportedComparator
Verbatim
e0“promote the growth of late rice,resulting in good yield,dry matter and nitrogen accumulation”
e1“Postponing nitrogen fertilization”
Claim · model-written summary
Rice yield was maximal with 53.8% of nitrogen as basal fertilizer.
- Taxon
- rice
Oryza sativae0 - Treatment
- nitrogen application as basal fertilizer accounted for 53.8%e0
- Outcome
- rice yielde0
- Direction
- maximume0
- Value
- 53.8%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When nitrogen application as basal fertilizer accounted for 53.8%,the rice yield amounted to maximum”
Claim · model-written summary
Milling quality improved as the panicle fertilizer ratio increased.
- Taxon
- riceOryza sativat0
- Treatment
- panicle fertilizer ratioe0
- Outcome
- milling qualitye0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“milling quality became better with the increasing panicle fertilizer ratio”
t0“Rice”
Claim · model-written summary
Appearance quality worsened as the panicle fertilizer ratio increased.
- Taxon
- riceOryza sativat0
- Treatment
- increasing panicle fertilizer ratioe1
- Outcome
- appearance qualitye0
- Direction
- worsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“appearance quality and cooking quality became worse”
t0“Rice”
e1“increasing panicle fertilizer ratio”
Claim · model-written summary
Cooking quality worsened as the panicle fertilizer ratio increased.
- Taxon
- riceOryza sativat0
- Treatment
- increasing panicle fertilizer ratioe1
- Outcome
- cooking qualitye0
- Direction
- worsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“appearance quality and cooking quality became worse”
t0“Rice”
e1“increasing panicle fertilizer ratio”
Claim · model-written summary
Postponing nitrogen fertilization improved nitrogen-use efficiency.
- Taxon
- late ricet0
- Treatment
- postponing nitrogen fertilizatione0
- Outcome
- nitrogen-use efficiencye0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“postponing nitrogen fertilization could appropriately improve the nitrogen-use efficiency”
t0“late rice”
Claim · model-written summary
At 40.3% basal nitrogen, late rice nitrogen uptake was maximal.
Verbatim
e0“basal fertilizer accounted for 40.3%,the N-uptake of late rice and nitrogen-use efficiency amounted to maximum”
Claim · model-written summary
At 40.3% basal nitrogen, nitrogen-use efficiency was maximal.
Verbatim
e0“basal fertilizer accounted for 40.3%,the N-uptake of late rice and nitrogen-use efficiency amounted to maximum”
Claim · model-written summary
Soil nitrogen dependency had a parabolic relationship with basal fertilizer ratio.
Not reportedDirection
Verbatim
e0“soil N dependency showed parabolic curve relationship with the basal fertilizer ratio”
t0“Late Rice”
Claim · model-written summary
Soil nitrogen dependency was lowest at a 40.0% basal fertilizer ratio.
Verbatim
e0“minimum soil N dependency was 54.5% when the ratio accounted for 40.0%”
t0“Late Rice”
Claim · model-written summary
Nitrogen harvest index increased as basal fertilizer application decreased.
Verbatim
e0“nitrogen harvest index and the N-requirement per 100 kg grain increased with the decreasing nitrogen application as basal fertilizer”
t0“Late Rice”
Claim · model-written summary
Nitrogen requirement per 100 kg grain increased as basal fertilizer application decreased.
Verbatim
e0“N-requirement per 100 kg grain increased with the decreasing nitrogen application as basal fertilizer”
t0“Late Rice”
Claim · model-written summary
The authors recommend 40%-50% basal, 20%-30% tiller and 20%-30% panicle fertilizer.
Verbatim
e0“best nitrogen application ratios,as the basal fertilizer,tiller fertilizer and panicle fertilizer were 40%-50%,20%-30% and 20%-30% respectively”
t0“Late Rice”