Abstract
An experiment was conducted to determine the effects of nitrogen (N) fertilization on growth and yield of some landrace rice (Oryza sativa L.) cultivars in lowland ecosystem. Three popular landrace rice cultivars: Rajashail, Kutiagni and Sadamota were treated with five times of N application viz. (i) two split applications of prilled urea (PU) at 10 days after transplanting (DAT) and before panicle initiation (PI) stage, (ii) deep placement of urea super granule (DPUSG) at 10 DAT, (iii) DPUSG before PI stage, (iv) PU application before PI stage and (v) control. The results showed that the landrace rice cultivar Kutiagni had the highest number of tillers under PU, while Rajashail gave the highest number of tillers under DPUSG applied before PI stage. Further, Kutiagni produced higher amount of dry matter under two splits of PU, while Rajashail produced higher amount of dry matter under DPUSG applied before PI stage. However, application of PU before PI stage significantly increased leaf area index in all the three landraces. The varieties responded to applied N and produced the highest yield in Kutiagni. The DPUSG at 10 DAT increased straw yield but failed to increase grain yield even over control. The DPUSG before PI stage significantly increased rice yield and economic return. The yield of rice in DPUSG applied before PI stage was comparable to two splits of PU and top dressing of PU before PI stage. Compared to control (2.93 t ha-1), yield increase was 26% in Kutiagni (3.70 t ha-1) under DPUSG before PI stage. These results suggest that Kutiagni was more responsive to added N and this cultivar could be cultivated with DPUSG at PI stage.The Agriculturists 2018; 16(1) 01-12
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Claims 13
Claim · model-written summary
Kutiagni had the highest tiller number under PU.
Verbatim
e0“landrace rice cultivar Kutiagni had the highest number of tillers under PU”
Claim · model-written summary
Rajashail had the highest tiller number under DPUSG before PI.
- Taxon
- Rice
Oryza sativat0 - Material
- Rajashaile0
- Treatment
- DPUSG applied before PI stagee0
- Outcome
- number of tillerse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rajashail gave the highest number of tillers under DPUSG applied before PI stage”
t0“Rice”
Claim · model-written summary
Kutiagni produced more dry matter under two PU splits.
- Taxon
- RiceOryza sativat0
- Material
- Kutiagnie0
- Treatment
- two splits of PUe0
- Outcome
- amount of dry mattere0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kutiagni produced higher amount of dry matter under two splits of PU”
t0“Rice”
Claim · model-written summary
Rajashail produced more dry matter under DPUSG before PI.
- Taxon
- RiceOryza sativat0
- Material
- Rajashaile0
- Treatment
- DPUSG applied before PI stagee0
- Outcome
- amount of dry mattere0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rajashail produced higher amount of dry matter under DPUSG applied before PI stage”
t0“Rice”
Claim · model-written summary
PU before PI significantly increased leaf area index in all three landraces.
- Taxon
- RiceOryza sativat0
- Treatment
- application of PU before PI stagee0
- Outcome
- leaf area indexe0
- Direction
- increasede0
- Qualifier
- all the three landracese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of PU before PI stage significantly increased leaf area index in all the three landraces”
t0“Rice”
Claim · model-written summary
Kutiagni produced the highest yield among the varieties responding to nitrogen.
- Taxon
- RiceOryza sativat0
- Material
- Kutiagnie0
- Outcome
- yielde0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The varieties responded to applied N and produced the highest yield in Kutiagni.”
t0“Rice”
Claim · model-written summary
DPUSG at 10 DAT increased straw yield.
- Taxon
- RiceOryza sativat0
- Treatment
- DPUSG at 10 DATe0
- Outcome
- straw yielde0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DPUSG at 10 DAT increased straw yield but failed to increase grain yield even over control.”
t0“Rice”
Claim · model-written summary
DPUSG at 10 DAT failed to raise grain yield above control.
- Taxon
- RiceOryza sativat0
- Treatment
- DPUSG at 10 DATe0
- Outcome
- grain yielde0
- Direction
- failed to increasee0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DPUSG at 10 DAT increased straw yield but failed to increase grain yield even over control.”
t0“Rice”
Claim · model-written summary
DPUSG before PI significantly increased rice yield.
- Taxon
- riceOryza sativae0
- Treatment
- DPUSG before PI stagee0
- Outcome
- rice yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DPUSG before PI stage significantly increased rice yield and economic return.”
Claim · model-written summary
DPUSG before PI significantly increased economic return.
- Taxon
- RiceOryza sativat0
- Treatment
- DPUSG before PI stagee0
- Outcome
- economic returne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The DPUSG before PI stage significantly increased rice yield and economic return.”
t0“Rice”
Claim · model-written summary
Yield under DPUSG before PI was comparable to two PU splits and top dressing before PI.
- Taxon
- riceOryza sativae0
- Treatment
- DPUSG applied before PI stagee0
- Outcome
- yield of ricee0
- Direction
- comparablee0
- Comparator
- two splits of PU and top dressing of PU before PI stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of rice in DPUSG applied before PI stage was comparable to two splits of PU and top dressing of PU before PI stage.”
Claim · model-written summary
Kutiagni yield under DPUSG before PI was 3.70 t ha-1, 26% above control.
- Taxon
- RiceOryza sativat0
- Material
- Kutiagnie0
- Treatment
- DPUSG before PI stagee0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- 26%e0
- Qualifier
- 3.70 t ha-1e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to control (2.93 t ha-1), yield increase was 26% in Kutiagni (3.70 t ha-1) under DPUSG before PI stage.”
t0“Rice”
Claim · model-written summary
The authors recommend cultivating Kutiagni with DPUSG at PI.
- Taxon
- RiceOryza sativat0
- Material
- Kutiagnie0
- Outcome
- could be cultivated with DPUSG at PI stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kutiagni was more responsive to added N and this cultivar could be cultivated with DPUSG at PI stage”
t0“Rice”
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