Abstract
Aerobic rice is a new production system in which specially-developed varieties are grown under non-flooded,non-puddled,and non-saturated soil conditions. In 2003–2004,irrigation x Nitrogen experiments were carried out near Beijing using variety HD297. Water treatments included four irrigation levels,and Nitrogen treatments included different fertilizer N application rates and different numbers of N splits. The highest yields were 4 460 kg/ha with 688 mm of total(rain plus irrigation) water input in 2003 and 6 026 kg/ha with 705 mm of water input in 2004. Because of the quite even distribution of rainfall in both years,the four irrigation treatments did not result in large differences of soil water conditions. There were few significant effects of irrigation on biomass accumulation,but yield increased with the total amount of water applied. High yields coincided with high harvest index and high percentages of grain filling. The application of fertilizer N either reduced biomass and yield or kept it at the same level as 0 N and consistently reduced the percentage grain filling and 1 000-grain weight. With the highest water application,five splits of N gave higher yield than three splits,whereas three splits gave higher yield than five splits with lower water applications.
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Claims 10
Claim · model-written summary
The highest yield in 2003 was 4 460 kg/ha with 688 mm total water.
Verbatim
e0“The highest yields were 4 460 kg/ha with 688 mm of total(rain plus irrigation) water input in 2003”
t0“Aerobic Rice”
Claim · model-written summary
The highest yield in 2004 was 6 026 kg/ha with 705 mm water.
Verbatim
e0“6 026 kg/ha with 705 mm of water input in 2004”
e1“The highest yields were 4 460 kg/ha with 688 mm of total(rain plus irrigation) water input in 2003 and 6 026 kg/ha with 705 mm of water input in 2004.”
t0“Aerobic Rice”
Claim · model-written summary
Irrigation had few significant effects on biomass accumulation.
Not reportedComparatorDirection
Verbatim
e0“There were few significant effects of irrigation on biomass accumulation”
t0“Aerobic Rice”
Claim · model-written summary
Rice yield increased with total water applied.
Verbatim
e0“yield increased with the total amount of water applied.”
t0“Aerobic Rice”
Claim · model-written summary
High yields coincided with high harvest index and grain filling percentage.
Verbatim
e0“High yields coincided with high harvest index and high percentages of grain filling.”
t0“Aerobic Rice”
Claim · model-written summary
Fertilizer N reduced or maintained biomass compared with 0 N.
Verbatim
e0“The application of fertilizer N either reduced biomass and yield or kept it at the same level as 0 N”
t0“Aerobic Rice”
Claim · model-written summary
Fertilizer N reduced or maintained yield compared with 0 N.
Verbatim
e0“The application of fertilizer N either reduced biomass and yield or kept it at the same level as 0 N”
t0“Aerobic Rice”
Claim · model-written summary
Fertilizer N consistently reduced grain filling percentage and 1 000-grain weight.
- Taxon
- Aerobic Ricet0
- Treatment
- fertilizer Ne1
- Outcome
- percentage grain filling and 1 000-grain weighte0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“consistently reduced the percentage grain filling and 1 000-grain weight.”
e1“The application of fertilizer N either reduced biomass and yield or kept it at the same level as 0 N and consistently reduced the percentage grain filling and 1 000-grain weight.”
t0“Aerobic Rice”
Claim · model-written summary
At the highest water application, five nitrogen splits yielded more than three.
Verbatim
e0“With the highest water application,five splits of N gave higher yield than three splits”
t0“Aerobic Rice”
Claim · model-written summary
At lower water applications, three nitrogen splits yielded more than five.
Verbatim
e0“three splits gave higher yield than five splits with lower water applications.”
t0“Aerobic Rice”
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