Abstract
A field experiment was conducted at Coimbatore during the rainy (kharif) season of 1999 and 2000, to study the effect of different water- and nitrogen-management practices on hybrid 'ADTRH I' rice (Oryza sativa L.) in clay-loam soil. The maximum yield of grain and straw were recorded with irrigation on the day of disappearance of ponded water which remained on a par with that obtained with irrigation 1 day after disappearance of ponded water. Among the nitrogen-management practices, significantly highest grain and straw yields were observed with recommended dose of 150 kg Ntha applied in 4 splits along with green manure. Similar trend was recorded for number of panicles, spikelets and filled grains while spikelet sterility and single grain weight remained unaf- fected by irrigation treatments, but showed a marked reduction of 2.0 to 2.5% at N,rN,>N, levels over No. Thus application of N in 3 or 4 splits helped reduce spikelet sterility and also improved grain weight significantly. The N uptake was significantly enhanced by the irrigation regimes with irrigation on the day of disappearance, and 1 day after disappearance of ponded water, being equally effective. Application recommended dose of N in 4 splits + green manure and 4 splits in different ratios were found equally effective in terms of nitrogen uptake. Higher agronomic efficiency was recorded with irrigation on the day of disappearance along with 4 splits of N + green manure and SPAD (spall out) basis of nitrogen application. Maximum water-use efficiency was obtained with wider irrigation interval at 3 days after disappearance of ponded water along with the 4 applications of N + green manure.
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Claims 11
Claim · model-written summary
Irrigation on the day ponded water disappeared gave the maximum grain and straw yield, on a par with irrigation one day after.
- Taxon
- rice
Oryza sativat0 - Material
- ADTRH It0
- Treatment
- irrigation on the day of disappearance of ponded watere1
- Outcome
- yield of grain and strawe1
- Direction
- maximume1
- Comparator
- irrigation 1 day after disappearance of ponded watere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The maximum yield of grain and straw were recorded with irrigation on the day of disappearance of ponded water which remained on a par with that obtained with irrigation 1 day after disappearance of ponded water”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Among nitrogen-management practices, 150 kg N/ha in 4 splits with green manure gave significantly the highest grain and straw yields.
- Taxon
- riceOryza sativat0
- Treatment
- recommended dose of 150 kg Ntha applied in 4 splits along with green manuree2
- Outcome
- grain and straw yieldse2
- Direction
- higheste2
- Comparator
- nitrogen-management practicese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Among the nitrogen-management practices, significantly highest grain and straw yields were observed with recommended dose of 150 kg Ntha applied in 4 splits along with green manure”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Number of panicles, spikelets and filled grains followed the same trend, highest with 150 kg N/ha in 4 splits with green manure.
- Taxon
- riceOryza sativat0
- Treatment
- recommended dose of 150 kg Ntha applied in 4 splits along with green manuree2
- Outcome
- number of panicles, spikelets and filled grainse3
- Direction
- higheste2
- Comparator
- nitrogen-management practicese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Among the nitrogen-management practices, significantly highest grain and straw yields were observed with recommended dose of 150 kg Ntha applied in 4 splits along with green manure”
e3“Similar trend was recorded for number of panicles, spikelets and filled grains”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Spikelet sterility and single grain weight were not affected by irrigation treatments.
- Taxon
- riceOryza sativat0
- Treatment
- irrigation treatmentse4
- Outcome
- spikelet sterility and single grain weighte4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“spikelet sterility and single grain weight remained unaf- fected by irrigation treatments, but showed a marked reduction of 2.0 to 2.5% at N,rN,>N, levels over No”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
At N levels above N0, spikelet sterility fell by 2.0 to 2.5%.
- Taxon
- riceOryza sativat0
- Treatment
- N,rN,>N, levelse4
- Outcome
- spikelet sterilitye4
- Direction
- reductione4
- Value
- 2.0 to 2.5%e4
- Comparator
- Noe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“spikelet sterility and single grain weight remained unaf- fected by irrigation treatments, but showed a marked reduction of 2.0 to 2.5% at N,rN,>N, levels over No”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Applying N in 3 or 4 splits helped reduce spikelet sterility.
- Taxon
- riceOryza sativat0
- Treatment
- application of N in 3 or 4 splitse6
- Outcome
- spikelet sterilitye6
- Direction
- reducee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“application of N in 3 or 4 splits helped reduce spikelet sterility and also improved grain weight significantly”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Applying N in 3 or 4 splits significantly improved grain weight.
- Taxon
- riceOryza sativat0
- Treatment
- application of N in 3 or 4 splitse6
- Outcome
- grain weighte6
- Direction
- improvede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“application of N in 3 or 4 splits helped reduce spikelet sterility and also improved grain weight significantly”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Irrigation regimes, with irrigation on the day ponded water disappeared or one day after, significantly enhanced N uptake equally.
- Taxon
- riceOryza sativat0
- Treatment
- irrigation regimese7
- Outcome
- N uptakee7
- Direction
- enhancede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The N uptake was significantly enhanced by the irrigation regimes with irrigation on the day of disappearance, and 1 day after disappearance of ponded water, being equally effective”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Recommended dose of N in 4 splits plus green manure and 4 splits in different ratios were equally effective for nitrogen uptake.
- Taxon
- riceOryza sativat0
- Treatment
- recommended dose of N in 4 splits + green manuree7
- Outcome
- nitrogen uptakee7
- Direction
- no_changeinferrede7
- Comparator
- 4 splits in different ratiose7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Application recommended dose of N in 4 splits + green manure and 4 splits in different ratios were found equally effective in terms of nitrogen uptake”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Higher agronomic efficiency was recorded with irrigation on the day ponded water disappeared together with 4 splits of N plus green manure.
- Taxon
- riceOryza sativat0
- Treatment
- irrigation on the day of disappearance along with 4 splits of N + green manuree7
- Outcome
- agronomic efficiencye7
- Direction
- Highere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Higher agronomic efficiency was recorded with irrigation on the day of disappearance along with 4 splits of N + green manure”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
Claim · model-written summary
Maximum water-use efficiency was obtained with an irrigation interval of 3 days after disappearance of ponded water plus 4 N applications with green manure.
- Taxon
- riceOryza sativat0
- Treatment
- wider irrigation interval at 3 days after disappearance of ponded watere7
- Outcome
- water-use efficiencye7
- Direction
- Maximume7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Maximum water-use efficiency was obtained with wider irrigation interval at 3 days after disappearance of ponded water along with the 4 applications of N + green manure”
t0“hybrid 'ADTRH I' rice (Oryza sativa)”
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