Abstract
In order to promote the efficient and coordinated utilization of water and nitrogen in rice, the 15 N missing technology experiment was adopted to study the effects of nitrogen application rate (N 0 , N 160 , N 200 , N 240 ) and irrigation mode (Wet-dry alternation, conventional irrigation) on nitrogen absorption, transport, residue, loss and nitrogen utilization of super rice. The results showed that with the increase of nitrogen application rate, the accumulation of fertilizer nitrogen and total nitrogen in rice plants at different growth stages, and the accumulation of nitrogen in various organs at mature stage increased significantly, and the accumulation of nitrogen per panicle at mature stage was the highest, reaching 67.20%~69.02%. The transport amount of nitrogen from different sources in different vegetative organs of rice plants increased with the increase of nitrogen application rate, and the comparison of nitrogen transport amount in organs was as follows: leaf > stem > root; After full heading, the accumulation of nitrogen from different sources and its contribution rate to grain nitrogen per spike increased with the increase of nitrogen application rate, but with the increase of nitrogen application rate, the residual amount of soil fertilizer nitrogen increased significantly, the residual rate showed a downward trend, and the nitrogen loss rate increased significantly. Dry-wet alternate irrigation treatment can increase nitrogen accumulation in different organs of rice in different periods, improve nitrogen use efficiency and rice yield to a certain extent. This study summarized the laws of nitrogen absorption, utilization, residue and loss of rice under different irrigation conditions and different nitrogen application conditions, which provided a theoretical basis for efficient cultivation of rice.
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Claims 10
Claim · model-written summary
Accumulation of fertilizer nitrogen and total nitrogen in rice plants, and nitrogen in various organs at maturity, increased significantly with nitrogen application rate.
Verbatim
e1“nitrogen utilization of super rice”
e2“with the increase of nitrogen application rate, the accumulation of fertilizer nitrogen and total nitrogen in rice plants at different growth stages, and the accumulation of nitrogen in various organs at mature stage increased significantly”
Claim · model-written summary
Nitrogen accumulation per panicle at maturity was the highest, reaching 67.20%~69.02%.
Verbatim
e1“nitrogen utilization of super rice”
e2“the accumulation of nitrogen per panicle at mature stage was the highest, reaching 67.20%~69.02%”
Claim · model-written summary
Transport amount of nitrogen from different sources in vegetative organs increased with nitrogen application rate.
Verbatim
e1“nitrogen utilization of super rice”
e2“The transport amount of nitrogen from different sources in different vegetative organs of rice plants increased with the increase of nitrogen application rate”
Claim · model-written summary
Nitrogen transport amount among organs was ranked leaf > stem > root.
Verbatim
e1“nitrogen utilization of super rice”
e2“the comparison of nitrogen transport amount in organs was as follows: leaf > stem > root”
Claim · model-written summary
Accumulation of nitrogen from different sources and its contribution rate to grain nitrogen per spike increased with nitrogen application rate after full heading.
Verbatim
e1“nitrogen utilization of super rice”
e2“After full heading, the accumulation of nitrogen from different sources and its contribution rate to grain nitrogen per spike increased with the increase of nitrogen application rate”
Claim · model-written summary
Residual amount of soil fertilizer nitrogen increased significantly with nitrogen application rate.
Verbatim
e1“nitrogen utilization of super rice”
e2“with the increase of nitrogen application rate, the residual amount of soil fertilizer nitrogen increased significantly”
Claim · model-written summary
Residual rate of fertilizer nitrogen showed a downward trend with increasing nitrogen application rate.
Verbatim
e1“nitrogen utilization of super rice”
e2“with the increase of nitrogen application rate, the residual amount of soil fertilizer nitrogen increased significantly, the residual rate showed a downward trend”
Claim · model-written summary
Nitrogen loss rate increased significantly with nitrogen application rate.
Verbatim
e1“nitrogen utilization of super rice”
e2“with the increase of nitrogen application rate, the residual amount of soil fertilizer nitrogen increased significantly, the residual rate showed a downward trend, and the nitrogen loss rate increased significantly”
Claim · model-written summary
Dry-wet alternate irrigation increased nitrogen accumulation in different organs of rice in different periods, compared with conventional irrigation.
- Taxon
- rice
Oryza sativae1 - Organ / stage
- different organse1
- Treatment
- Dry-wet alternate irrigation treatmente1
- Outcome
- nitrogen accumulation in different organse1
- Direction
- increasee1
- Qualifier
- in different periodse1
- Comparator
- conventional irrigatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Dry-wet alternate irrigation treatment can increase nitrogen accumulation in different organs of rice in different periods”
e2“irrigation mode (Wet-dry alternation, conventional irrigation)”
Claim · model-written summary
Dry-wet alternate irrigation improved nitrogen use efficiency and rice yield to a certain extent, compared with conventional irrigation.
- Taxon
- riceOryza sativae1
- Treatment
- Dry-wet alternate irrigation treatmente2
- Outcome
- nitrogen use efficiency and rice yielde1
- Direction
- improvee1
- Qualifier
- to a certain extente1
- Comparator
- conventional irrigatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“improve nitrogen use efficiency and rice yield to a certain extent”
e2“Dry-wet alternate irrigation treatment can increase nitrogen accumulation in different organs of rice in different periods”
e3“irrigation mode (Wet-dry alternation, conventional irrigation)”
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