Abstract
The study was conducted during 2012 from May to August cropping year at paddy field of Tsukuba International Training Center (TBIC), Japan. The main purpose of the experiment was to investigate the effect of planting density on the growth, yield and yield attributes of rice. The experiment comprised of five planting densities (16.7, 22.2, 25, 33.3 and 50 hills m-2). It was arranged in Randomized Complete Block Design with three replications. The results showed that the effect of planting density was highly significant in influencing panicle number m-2, spikelet number per panicle and ripening percentage. Higher panicle number was obtained in 50 hills m-2 and followed by 33.3 hills m-2 over the standard density. On the other hand, a decrease in density brought a significant increase in spikelet number per panicle over the preceding population density. Spikelet number per panicle increase of 44, 32, 26 and 9% were obtained in 16.7 hills m-2 over 50, 33.3, 25 and 22.2 hills m-2, respectively. Higher grain yield was obtained in 50 hills m-2 and followed by 16.7 hills m-2, but it was not significantly different among density treatments. The paddy yield record obtained due to high planting density over 16.7, 22.2, 25 and 33.3 hills m-2 were 4.0, 9.5, 4.8 and 6.9% respectively. With an increasing plant density from 16.7 to 50 hills m-2 panicle length and stem diameter decreases by 12 and 29.2%, respectively. In most of the evaluated traits, highest values were obtained from 16.7 and 50 hills m-2. Therefore, 16.7 and 50 hills m-2 were more appropriate densities for cultivation of Nerica-4 variety. Key words: Planting density, rice, growth, yield, yield attributes.
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Claims 15
Claim · model-written summary
Planting density had a highly significant effect on panicle number per m2, spikelet number per panicle and ripening percentage in rice.
- Taxon
- rice
Oryza sativat0 - Treatment
- planting densitye1
- Outcome
- panicle number m-2, spikelet number per panicle and ripening percentagee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e1“the effect of planting density was highly significant in influencing panicle number m-2, spikelet number per panicle and ripening percentage”
Claim · model-written summary
Panicle number per m2 was higher at 50 hills m-2, followed by 33.3 hills m-2, than at the standard density in rice.
- Taxon
- riceOryza sativat0
- Treatment
- 50 hills m-2e2
- Outcome
- panicle numbere2
- Direction
- Highere2
- Comparator
- standard densitye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e2“Higher panicle number was obtained in 50 hills m-2 and followed by 33.3 hills m-2 over the standard density”
Claim · model-written summary
Decreasing planting density significantly increased spikelet number per panicle relative to the preceding population density in rice.
- Taxon
- riceOryza sativat0
- Treatment
- decrease in densitye3
- Outcome
- spikelet number per paniclee3
- Direction
- increasee3
- Comparator
- preceding population densitye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e3“a decrease in density brought a significant increase in spikelet number per panicle over the preceding population density”
Claim · model-written summary
Spikelet number per panicle increased by 44% at 16.7 hills m-2 compared with 50 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- 16.7 hills m-2e4
- Outcome
- Spikelet number per paniclee4
- Direction
- increasee4
- Value
- 44e4
- Comparator
- 50e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e4“Spikelet number per panicle increase of 44, 32, 26 and 9% were obtained in 16.7 hills m-2 over 50, 33.3, 25 and 22.2 hills m-2”
Claim · model-written summary
Spikelet number per panicle increased by 32% at 16.7 hills m-2 compared with 33.3 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- 16.7 hills m-2e4
- Outcome
- Spikelet number per paniclee4
- Direction
- increasee4
- Value
- 32e4
- Comparator
- 33.3e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e4“Spikelet number per panicle increase of 44, 32, 26 and 9% were obtained in 16.7 hills m-2 over 50, 33.3, 25 and 22.2 hills m-2”
Claim · model-written summary
Spikelet number per panicle increased by 26% at 16.7 hills m-2 compared with 25 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- 16.7 hills m-2e4
- Outcome
- Spikelet number per paniclee4
- Direction
- increasee4
- Value
- 26e4
- Comparator
- 25e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e4“Spikelet number per panicle increase of 44, 32, 26 and 9% were obtained in 16.7 hills m-2 over 50, 33.3, 25 and 22.2 hills m-2”
Claim · model-written summary
Spikelet number per panicle increased by 9% at 16.7 hills m-2 compared with 22.2 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- 16.7 hills m-2e4
- Outcome
- Spikelet number per paniclee4
- Direction
- increasee4
- Value
- 9%e4
- Comparator
- 22.2 hills m-2e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e4“Spikelet number per panicle increase of 44, 32, 26 and 9% were obtained in 16.7 hills m-2 over 50, 33.3, 25 and 22.2 hills m-2”
Claim · model-written summary
Grain yield was higher at 50 hills m-2, followed by 16.7 hills m-2, but did not differ significantly among planting density treatments in rice.
- Taxon
- riceOryza sativat0
- Treatment
- density treatmentse5
- Outcome
- grain yielde5
- Direction
- not significantly differente5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e5“Higher grain yield was obtained in 50 hills m-2 and followed by 16.7 hills m-2, but it was not significantly different among density treatments”
Claim · model-written summary
Paddy yield under high planting density (50 hills m-2) was 4.0% higher than at 16.7 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- high planting densitye6
- Outcome
- paddy yielde6
- Direction
- higherinferrede6
- Value
- 4.0e6
- Comparator
- 16.7e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e6“The paddy yield record obtained due to high planting density over 16.7, 22.2, 25 and 33.3 hills m-2 were 4.0, 9.5, 4.8 and 6.9%”
Claim · model-written summary
Paddy yield under high planting density (50 hills m-2) was 9.5% higher than at 22.2 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- high planting densitye6
- Outcome
- paddy yielde6
- Direction
- higherinferrede6
- Value
- 9.5e6
- Comparator
- 22.2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e6“The paddy yield record obtained due to high planting density over 16.7, 22.2, 25 and 33.3 hills m-2 were 4.0, 9.5, 4.8 and 6.9%”
Claim · model-written summary
Paddy yield under high planting density (50 hills m-2) was 4.8% higher than at 25 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- high planting densitye6
- Outcome
- paddy yielde6
- Direction
- higherinferrede6
- Value
- 4.8e6
- Comparator
- 25e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e6“The paddy yield record obtained due to high planting density over 16.7, 22.2, 25 and 33.3 hills m-2 were 4.0, 9.5, 4.8 and 6.9%”
Claim · model-written summary
Paddy yield under high planting density (50 hills m-2) was 6.9% higher than at 33.3 hills m-2 in rice.
- Taxon
- riceOryza sativat0
- Treatment
- high planting densitye6
- Outcome
- paddy yielde6
- Direction
- higherinferrede6
- Value
- 6.9%e6
- Comparator
- 33.3 hills m-2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e6“The paddy yield record obtained due to high planting density over 16.7, 22.2, 25 and 33.3 hills m-2 were 4.0, 9.5, 4.8 and 6.9%”
Claim · model-written summary
Panicle length decreased by 12% in rice as plant density increased from 16.7 to 50 hills m-2.
- Taxon
- riceOryza sativat0
- Treatment
- increasing plant density from 16.7 to 50 hills m-2e7
- Outcome
- panicle lengthe7
- Direction
- decreasese7
- Value
- 12e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e7“With an increasing plant density from 16.7 to 50 hills m-2 panicle length and stem diameter decreases by 12 and 29.2%”
Claim · model-written summary
Stem diameter decreased by 29.2% in rice as plant density increased from 16.7 to 50 hills m-2.
- Taxon
- riceOryza sativat0
- Treatment
- increasing plant density from 16.7 to 50 hills m-2e7
- Outcome
- stem diametere7
- Direction
- decreasese7
- Value
- 29.2%e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e7“With an increasing plant density from 16.7 to 50 hills m-2 panicle length and stem diameter decreases by 12 and 29.2%”
Claim · model-written summary
The authors recommend 16.7 and 50 hills m-2 as the more appropriate densities for cultivating the rice variety Nerica-4.
- Taxon
- riceOryza sativat0
- Material
- Nerica-4e0
- Outcome
- more appropriate densities for cultivatione0
- Value
- 16.7 and 50 hills m-2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rice (Oryza sativa L.)”
e0“16.7 and 50 hills m-2 were more appropriate densities for cultivation of Nerica-4 variety”
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