Abstract
The japonica super rice in North China 'Shennong 265' was used to study the tiller dynamics,the LAI dynamics,matter production characteristics,yield component characteristics and the effects of matter production characteristics on yield under four different nitrogen application patterns.The results showed that for each nitrogen application pattern,the yield under high nitrogen application(14.5 kg 667 m-2) was significantly higher than that under low nitrogen level(12.5 kg 667 m-2).On yield component,the high yields under high nitrogen application patterns lay in the increase of factors outside panicles(number of panicles,number of spikelet per square meter,filled grains per square meter) and the decrease of factors inside panicles(weight per pani-cle,1000-grain weight,seed setting rate,total number of grains per panicle,number of filled grains per panicle).On the same nitrogen application level,the yields of Five-time application in three periods(FTATP) pattern and Stable application at early stage large application at middle stage and satisfied application at late stage(SELMSL) pattern were significantly higher than those of All application at early stage(AAES) pattern and Slow-release fertilizer applied once at early stage(SRFAOES) pattern.But the yield components of FTATP and SELMSL were different.FTATP increased yield by improving factors outside panicles,while SELMSL reached high yield by improving factors inside panicles.The yields of FTATP and SELMSL were significantly higher than those of AAES and SRFAOES,which lay in the increase new assimilate after heading(assimilate sup-plying directly) and the secondary utilization of the matter accumulated in nutritorium before heading(assimilate supplying indi-rectly) under FTATP and SELMSL.And the matter output rate and contribution rate to the yield from nutritorium were higher than those under AAES and SRFAOES.Besides,with the two nitrogen application levels,FTATP and SELMSL had significantly higher agronomic N use efficiency,apparent N recovery efficiency,total N per square meter than the other patterns.Under 14.5 kg 667 m-2 of nitrogen application,FTATP and SELMSL reached the super high yield(11 t ha-1).
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Claims 11
Claim · model-written summary
High nitrogen gave significantly higher yield than low nitrogen for each pattern.
Verbatim
t0“Japonica Super Rice”
e0“for each nitrogen application pattern,the yield under high nitrogen application(14.5 kg 667 m-2) was significantly higher than that under low nitrogen level(12.5 kg 667 m-2)”
Claim · model-written summary
High nitrogen increased outside-panicle yield components.
- Taxon
- Japonica Super Ricet0
- Treatment
- high nitrogen application patternse0
- Outcome
- number of panicles,number of spikelet per square meter,filled grains per square metere0
- Direction
- increasee0
Not reportedComparator
Verbatim
t0“Japonica Super Rice”
e0“the high yields under high nitrogen application patterns lay in the increase of factors outside panicles(number of panicles,number of spikelet per square meter,filled grains per square meter)”
Claim · model-written summary
High nitrogen decreased inside-panicle yield components.
- Taxon
- Japonica Super Ricet0
- Outcome
- weight per pani-cle,1000-grain weight,seed setting ratee0
- Direction
- decreasee0
Not reportedTreatmentComparator
Verbatim
t0“Japonica Super Rice”
e0“the decrease of factors inside panicles(weight per pani-cle,1000-grain weight,seed setting rate,total number of grains per panicle,number of filled grains per panicle)”
Claim · model-written summary
FTATP and SELMSL significantly exceeded AAES and SRFAOES in yield at the same nitrogen level.
- Taxon
- Japonica Super Ricet0
- Treatment
- Five-time application in three periods(FTATP) pattern and Stable application at early stage large application at middle stage and satisfied application at late stage(SELMSL) patterne0
- Outcome
- yieldse0
- Direction
- highere0
- Comparator
- All application at early stage(AAES) pattern and Slow-release fertilizer applied once at early stage(SRFAOES) patterne0
Verbatim
t0“Japonica Super Rice”
e0“On the same nitrogen application level,the yields of Five-time application in three periods(FTATP) pattern and Stable application at early stage large application at middle stage and satisfied application at late stage(SELMSL) pattern were significantly higher than those of All application at early stage(AAES) pattern and Slow-release fertilizer applied once at early stage(SRFAOES) pattern”
Claim · model-written summary
FTATP improved outside-panicle factors.
- Taxon
- Japonica Super Ricet0
- Treatment
- FTATPe0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- improving factors outside paniclese0
Not reportedComparator
Verbatim
t0“Japonica Super Rice”
e0“FTATP increased yield by improving factors outside panicles”
Claim · model-written summary
SELMSL improved inside-panicle factors.
- Taxon
- Japonica Super Ricet0
- Treatment
- SELMSLe0
- Outcome
- yielde0
- Direction
- highe0
- Qualifier
- improving factors inside paniclese0
Not reportedComparator
Verbatim
t0“Japonica Super Rice”
e0“SELMSL reached high yield by improving factors inside panicles”
Claim · model-written summary
FTATP and SELMSL increased new assimilate after heading and reutilization of pre-heading matter.
Verbatim
t0“Japonica Super Rice”
e0“the increase new assimilate after heading(assimilate sup-plying directly) and the secondary utilization of the matter accumulated in nutritorium before heading(assimilate supplying indi-rectly) under FTATP and SELMSL”
Claim · model-written summary
FTATP and SELMSL increased matter output and contribution to yield relative to AAES and SRFAOES.
Verbatim
t0“Japonica Super Rice”
e0“the matter output rate and contribution rate to the yield from nutritorium were higher than those under AAES and SRFAOES”
e1“under FTATP and SELMSL.And the matter output rate”
Claim · model-written summary
FTATP and SELMSL increased agronomic N use efficiency and apparent N recovery efficiency.
Verbatim
t0“Japonica Super Rice”
e0“FTATP and SELMSL had significantly higher agronomic N use efficiency,apparent N recovery efficiency,total N per square meter than the other patterns”
Claim · model-written summary
FTATP and SELMSL increased total N per square meter.
Verbatim
t0“Japonica Super Rice”
e0“FTATP and SELMSL had significantly higher agronomic N use efficiency,apparent N recovery efficiency,total N per square meter than the other patterns”
Claim · model-written summary
At 14.5 kg nitrogen, FTATP and SELMSL reached 11 t ha-1 yield.
- Taxon
- Japonica Super Ricet0
- Treatment
- FTATP and SELMSLe0
- Outcome
- yielde0
- Direction
- super highe0
- Value
- 11 t ha-1e0
- Qualifier
- 14.5 kg 667 m-2e0
Not reportedComparator
Verbatim
t0“Japonica Super Rice”
e0“Under 14.5 kg 667 m-2 of nitrogen application,FTATP and SELMSL reached the super high yield(11 t ha-1)”