Abstract
Gains or losses in grain yield and water-use efficiency of aerobic direct-seeded rice (Oryza sativa L.) must be considered before promoting this technology in areas where this is not common. In the northwestern Indo-Gangetic Plains (IGP) of South Asia, irrigation water for rice production is becoming scarce because of depleting surface and groundwater resources. The objective of this study was to compare the crop performance and water-use efficiency of 10 selected rice cultivars between aerobic direct-seeded rice (ADSR) and conventional puddled transplanted rice (CPTR) on a sandy loam soil in Punjab Agricultural University (PAU), Ludhiana, India. Grain yields were similar between ADSR and CPTR for cultivars PR-120, Punjab Mehak 1, Fang-ai-zan, and RH-664. Grain yields of the other cultivars decreased significantly in ADSR compared with CPTR. PAU-201, a medium-duration cultivar, had the highest grain yields in each crop establishment method, followed by PR-120. Water-use efficiency (WUE) values for Fang-ai-zan, RH-257 (hybrid), PAU-201, and PR-120 were significantly higher than the WUE of any other cultivar, and they also had high values for stress-tolerance index (STI). Averaged across cultivars, WUE was similar in ADSR and CPTR as yield reduction in ADSR overweighed the benefit of water saving. We recommend that for more economic water use in the northwestern part of IGP, growing cultivars such as Fang-ai-zan, RH-257, PR-120, and PAU-201 in ADSR because of their lower water requirement, yield maintenance, and relatively higher STI. Correlation coefficients between STIs revealed that STI, mean productivity (MP), and geometric mean productivity (GMP) were the best criteria for the selection of high-yielding cultivars under ADSR and CPTR.
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Claims 8
Claim · model-written summary
Grain yields were similar between ADSR and CPTR for cultivars PR-120, Punjab Mehak 1, Fang-ai-zan and RH-664.
- Taxon
- rice (Oryza sativa L.)
Oryza sativae0 - Material
- PR-120, Punjab Mehak 1, Fang-ai-zan, and RH-664e1
- Treatment
- ADSRe1
- Outcome
- Grain yieldse1
- Direction
- no_changeinferrede1
- Comparator
- CPTRe1
- Setting
- Punjab Agricultural University (PAU), Ludhiana, Indiae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e1“Grain yields were similar between ADSR and CPTR for cultivars PR-120, Punjab Mehak 1, Fang-ai-zan, and RH-664”
e2“on a sandy loam soil in Punjab Agricultural University (PAU), Ludhiana, India”
Claim · model-written summary
Grain yields of the other cultivars decreased significantly in ADSR compared with CPTR.
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Treatment
- ADSRe3
- Outcome
- Grain yieldse3
- Direction
- decreasede3
- Comparator
- CPTRe3
- Setting
- Punjab Agricultural University (PAU), Ludhiana, Indiae2
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e2“on a sandy loam soil in Punjab Agricultural University (PAU), Ludhiana, India”
e3“Grain yields of the other cultivars decreased significantly in ADSR compared with CPTR”
Claim · model-written summary
PAU-201 had the highest grain yields in each crop establishment method, followed by PR-120.
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Material
- PAU-201e4
- Outcome
- grain yieldse4
- Direction
- higheste4
- Qualifier
- followed by PR-120e4
- Setting
- Punjab Agricultural University (PAU), Ludhiana, Indiae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e2“on a sandy loam soil in Punjab Agricultural University (PAU), Ludhiana, India”
e4“PAU-201, a medium-duration cultivar, had the highest grain yields in each crop establishment method, followed by PR-120”
Claim · model-written summary
Water-use efficiency of Fang-ai-zan, RH-257, PAU-201 and PR-120 was significantly higher than that of any other cultivar.
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Material
- Fang-ai-zan, RH-257 (hybrid), PAU-201, and PR-120e5
- Outcome
- Water-use efficiency (WUE) valuese5
- Direction
- significantly highere5
- Comparator
- any other cultivare5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e5“Water-use efficiency (WUE) values for Fang-ai-zan, RH-257 (hybrid), PAU-201, and PR-120 were significantly higher than the WUE of any other cultivar”
Claim · model-written summary
Fang-ai-zan, RH-257, PAU-201 and PR-120 had high values of stress-tolerance index (STI).
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Material
- Fang-ai-zan, RH-257 (hybrid), PAU-201, and PR-120e5
- Outcome
- stress-tolerance index (STI)e6
- Qualifier
- high valuese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e5“Water-use efficiency (WUE) values for Fang-ai-zan, RH-257 (hybrid), PAU-201, and PR-120 were significantly higher than the WUE of any other cultivar”
e6“they also had high values for stress-tolerance index (STI)”
Claim · model-written summary
Averaged across cultivars, water-use efficiency was similar in ADSR and CPTR because yield reduction in ADSR outweighed water saving.
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Treatment
- ADSRe7
- Outcome
- WUEe7
- Direction
- no_changeinferrede7
- Qualifier
- yield reduction in ADSR overweighed the benefit of water savinge7
- Comparator
- CPTRe7
- Setting
- Punjab Agricultural University (PAU), Ludhiana, Indiae2
Not reportedMaterial
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e2“on a sandy loam soil in Punjab Agricultural University (PAU), Ludhiana, India”
e7“Averaged across cultivars, WUE was similar in ADSR and CPTR as yield reduction in ADSR overweighed the benefit of water saving”
Claim · model-written summary
The authors recommend growing Fang-ai-zan, RH-257, PR-120 and PAU-201 in ADSR in the northwestern Indo-Gangetic Plains for more economic water use.
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Treatment
- ADSRe1
- Outcome
- growing cultivars such as Fang-ai-zan, RH-257, PR-120, and PAU-201 in ADSRe1
- Setting
- northwestern part of IGPe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e1“We recommend that for more economic water use in the northwestern part of IGP, growing cultivars such as Fang-ai-zan, RH-257, PR-120, and PAU-201 in ADSR”
Claim · model-written summary
STI, MP and GMP were the best criteria for selecting high-yielding cultivars under ADSR and CPTR.
- Taxon
- rice (Oryza sativa L.)Oryza sativae0
- Treatment
- ADSR and CPTRe1
- Outcome
- criteria for the selection of high-yielding cultivarse1
- Direction
- beste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerobic direct-seeded rice (Oryza sativa L.)”
e1“STI, mean productivity (MP), and geometric mean productivity (GMP) were the best criteria for the selection of high-yielding cultivars under ADSR and CPTR”
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