Abstract
A two-year pot-culture experiment of rice cultivar,II You 838,with alluvial soil from Hubei was conducted to investigate the effects of two water management patterns and four nitrogen(N) fertilizer levels(N 0,126.0,157.5,210.0 kg/ha)on the aerial part biomass,N accumulation,N use efficiency.The results show that the aerial part biomass,N accumulation and N use efficiency of rice are obviously affected by the water management patterns,and the rice grain yield,N accumulation,N agronomic efficiency,N recovery efficiency,partial factor productivity and nitrogen physiological efficiency under the water-logging irrigation pattern are higher than those of the water-controlled irrigation pattern.The biomass and N accumulation of rice aerial parts are increased with the increase of nitrogen level,while the nitrogen agronomic efficiency,partial factor productivity of the applied N and N physiological efficiency are reduced.However,there are no significant differences between the 25% N saving from conventional nitrogen application rate(N 157.5 kg/ha) and the conventional nitrogen application rate(N 210.0 kg/ha).In general,the water-logging irrigation pattern combined with the 25% N saving from conventional nitrogen application rate is recommended as a better water and nitrogen application patterns due to its higher grain yield and nitrogen utilization.
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Claims 5
Claim · model-written summary
Water logging irrigation gave higher grain yield, nitrogen accumulation, and four nitrogen efficiency metrics than controlled irrigation.
- Taxon
- rice
Oryza sativat0 - Treatment
- water-logging irrigation patterne0
- Outcome
- rice grain yield,N accumulation,N agronomic efficiencye0
- Direction
- highere0
- Comparator
- water-controlled irrigation patterne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rice grain yield,N accumulation,N agronomic efficiency,N recovery efficiency,partial factor productivity and nitrogen physiological efficiency under the water-logging irrigation pattern are higher than those of the water-controlled irrigation pattern”
t0“rice”
Claim · model-written summary
Increasing nitrogen increased aerial biomass and nitrogen accumulation.
- Taxon
- riceOryza sativat0
- Treatment
- increase of nitrogen levele0
- Outcome
- biomass and N accumulation of rice aerial partse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The biomass and N accumulation of rice aerial parts are increased with the increase of nitrogen level”
t0“rice”
Claim · model-written summary
Increasing nitrogen reduced agronomic efficiency, partial factor productivity and physiological efficiency.
- Taxon
- riceOryza sativat0
- Treatment
- increase of nitrogen levele1
- Outcome
- nitrogen agronomic efficiency,partial factor productivity of the applied N and N physiological efficiencye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the nitrogen agronomic efficiency,partial factor productivity of the applied N and N physiological efficiency are reduced”
e1“increase of nitrogen level”
t0“rice”
Claim · model-written summary
A 25% nitrogen saving did not differ significantly from the conventional rate.
- Taxon
- riceOryza sativat0
- Treatment
- 25% N saving from conventional nitrogen application rate(N 157.5 kg/ha)e0
- Outcome
- no significant differencese0
- Direction
- no significant differencese0
- Comparator
- conventional nitrogen application rate(N 210.0 kg/ha)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there are no significant differences between the 25% N saving from conventional nitrogen application rate(N 157.5 kg/ha) and the conventional nitrogen application rate(N 210.0 kg/ha)”
t0“rice”
Claim · model-written summary
The authors recommend water logging irrigation with 25% nitrogen saving for grain yield and nitrogen use.
- Taxon
- riceOryza sativat0
- Outcome
- water-logging irrigation pattern combined with the 25% N saving from conventional nitrogen application ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the water-logging irrigation pattern combined with the 25% N saving from conventional nitrogen application rate is recommended as a better water and nitrogen application patterns due to its higher grain yield and nitrogen utilization”
t0“rice”
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