Abstract
Two field experiments were conducted at Rice Research and Training Center (RRTC), Sakha Kafr El-Sheikh, Egypt, in 2010 and 2011 rice seasons to study the performance of SK2034H (H1) and SK2046H (H2) hybrid rice varieties under seeding rates i.e. 34, 46, 58 and 70 g/m2 and N-levels (0, 50, 100, 150 and 200 kg/ha). The obtained results revealed that, in nursery studies SK2034H surpassed SK2046H in both seedling length and shoot length. On contrast the opposite results was observed with both number of leaves/seedling and root : shoot ratio. Seed rate of 34 and 46 g/m2 gave the greatest seedling characters in nursery (greatest seedling vigor) compared with the other seed rates. SK2034H gave the highest number of leaves/seedling under 34 g/m2, while SK2046H produced the greatest value in this aspect under both 34 and 46 g/m2. The first three seed rates (34, 46 and 58 g/m2) improved root/shoot ratio of SK2034H, while the second hybrid responded to only 34 g/m2. In the permanent field, SK2046H (H2) hybrid had higher dry matter content (DM), leaf area index (LAI), flag leaf area (FLA) and root dry weight than SK2034H (H1). Seed rate of 34 g/m2 gave the highest previous growth characters than the other rates under study. The application of 200 kg N/ha gave the greatest values in the same growth parameters. Seed rate of 34 g/m2 combined with 200 kg N/ha produced the greatest dry matter content and flag leaf area of SK2046H. In both seasons, H2 surpassed H1 in no. of panicles/m2, 1000-grain weight, harvest index (HI) and grain yield. While, H1 surpassed H2 in both panicle weight and no. of filled grains/panicle. Seed rates of 34 g/m2 was the best for number of panicles/m2, yield components, while grain yield and HI was the highest under both seed rate of 34 and 46 g/m2. Adding 200 kg N/ha produced the greatest grain yield and its components. Number of panicles/m2 and 1000-grain weight of SK2046H (H2) reached to maximum value under seed rate of 34 g/m2 with 200 kg N/ha. Filled grains/panicle reached to the highest value when SK2034H (H1) variety under the seed rate of 34 g/m2 and fertilized by 200 kg N/ha. Grain yield of both hybrids (H1 and H2) was the best under the seed rates of 34 and 46 g/m2 combined with 200 kg N/ha. The same trend was obtained with harvest index (HI).
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Claims 20
Claim · model-written summary
SK2034H exceeded SK2046H in seedling and shoot length.
- Taxon
- RICE VARIETIES
Oryza sativat0 - Material
- SK2034He0
- Outcome
- seedling length and shoot lengthe0
- Direction
- surpassede0
- Comparator
- SK2046He0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in nursery studies SK2034H surpassed SK2046H in both seedling length and shoot length.”
t0“RICE VARIETIES”
Claim · model-written summary
SK2046H exceeded SK2034H in leaves per seedling and root-to-shoot ratio.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2046He1
- Outcome
- number of leaves/seedling and root : shoot ratioe0
- Direction
- opposite resultse0
- Comparator
- SK2034He1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On contrast the opposite results was observed with both number of leaves/seedling and root : shoot ratio.”
e1“in nursery studies SK2034H surpassed SK2046H in both seedling length and shoot length.”
t0“RICE VARIETIES”
Claim · model-written summary
Seed rates of 34 and 46 g/m2 gave the greatest nursery seedling vigor.
- Taxon
- RICE VARIETIESOryza sativat0
- Treatment
- Seed rate of 34 and 46 g/m2e0
- Outcome
- seedling vigore0
- Direction
- greateste0
- Comparator
- the other seed ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed rate of 34 and 46 g/m2 gave the greatest seedling characters in nursery (greatest seedling vigor) compared with the other seed rates.”
t0“RICE VARIETIES”
Claim · model-written summary
SK2034H had the highest leaves per seedling at 34 g/m2.
Not reportedTaxonComparator
Verbatim
e0“SK2034H gave the highest number of leaves/seedling under 34 g/m2”
Claim · model-written summary
SK2046H had its highest leaves per seedling at 34 and 46 g/m2.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2046He0
- Treatment
- 34 and 46 g/m2e0
- Outcome
- number of leaves/seedlinge1
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SK2046H produced the greatest value in this aspect under both 34 and 46 g/m2.”
e1“SK2034H gave the highest number of leaves/seedling under 34 g/m2, while SK2046H produced the greatest value in this aspect under both 34 and 46 g/m2.”
t0“RICE VARIETIES”
Claim · model-written summary
Rates of 34, 46, and 58 g/m2 improved the root-to-shoot ratio of SK2034H.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2034He0
- Treatment
- 34, 46 and 58 g/m2e0
- Outcome
- root/shoot ratioe0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The first three seed rates (34, 46 and 58 g/m2) improved root/shoot ratio of SK2034H”
t0“RICE VARIETIES”
Claim · model-written summary
Only 34 g/m2 improved root-to-shoot ratio of SK2046H.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2034He1
- Treatment
- 34 g/m2e0
- Outcome
- root/shoot ratioe1
- Direction
- respondede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the second hybrid responded to only 34 g/m2.”
e1“The first three seed rates (34, 46 and 58 g/m2) improved root/shoot ratio of SK2034H, while the second hybrid responded to only 34 g/m2.”
t0“RICE VARIETIES”
Claim · model-written summary
SK2046H had higher dry matter, leaf area index, flag leaf area, and root dry weight than SK2034H.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2046H (H2)e0
- Outcome
- dry matter content (DM), leaf area index (LAI), flag leaf area (FLA) and root dry weighte0
- Direction
- highere0
- Comparator
- SK2034H (H1)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SK2046H (H2) hybrid had higher dry matter content (DM), leaf area index (LAI), flag leaf area (FLA) and root dry weight than SK2034H (H1).”
t0“RICE VARIETIES”
Claim · model-written summary
A 34 g/m2 seed rate gave the highest field growth traits.
- Taxon
- RICE VARIETIESOryza sativat0
- Treatment
- Seed rate of 34 g/m2e0
- Outcome
- growth characterse0
- Direction
- higheste0
- Comparator
- the other rates under studye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed rate of 34 g/m2 gave the highest previous growth characters than the other rates under study.”
e1“SK2046H (H2) hybrid had higher dry matter content (DM), leaf area index (LAI), flag leaf area (FLA) and root dry weight than SK2034H (H1).”
t0“RICE VARIETIES”
Claim · model-written summary
Applying 200 kg N/ha gave the greatest field growth parameters.
- Taxon
- RICE VARIETIESOryza sativat0
- Treatment
- 200 kg N/hae0
- Outcome
- growth parameterse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 200 kg N/ha gave the greatest values in the same growth parameters.”
t0“RICE VARIETIES”
Claim · model-written summary
Combining 34 g/m2 with 200 kg N/ha maximized SK2046H dry matter content and flag leaf area.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2046He0
- Treatment
- 34 g/m2 combined with 200 kg N/hae0
- Outcome
- dry matter content and flag leaf areae0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed rate of 34 g/m2 combined with 200 kg N/ha produced the greatest dry matter content and flag leaf area of SK2046H.”
t0“RICE VARIETIES”
Claim · model-written summary
H2 exceeded H1 in panicle density, thousand-grain weight, and harvest index.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- H2e0
- Outcome
- no. of panicles/m2, 1000-grain weight, harvest index (HI)e0
- Direction
- surpassede0
- Comparator
- H1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H2 surpassed H1 in no. of panicles/m2, 1000-grain weight, harvest index (HI) and grain yield.”
t0“RICE VARIETIES”
Claim · model-written summary
H2 exceeded H1 in grain yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H2 surpassed H1 in no. of panicles/m2, 1000-grain weight, harvest index (HI) and grain yield.”
t0“RICE VARIETIES”
Claim · model-written summary
H1 exceeded H2 in panicle weight and filled grains per panicle.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- H1e0
- Outcome
- panicle weight and no. of filled grains/paniclee0
- Direction
- surpassede0
- Comparator
- H2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“H1 surpassed H2 in both panicle weight and no. of filled grains/panicle.”
t0“RICE VARIETIES”
Claim · model-written summary
A 34 g/m2 seed rate was best for panicle density and yield components.
Not reportedTaxonComparator
Verbatim
e0“Seed rates of 34 g/m2 was the best for number of panicles/m2, yield components”
Claim · model-written summary
Seed rates of 34 and 46 g/m2 gave the highest grain yield and harvest index.
- Taxon
- RICE VARIETIESOryza sativat0
- Treatment
- 34 and 46 g/m2e0
- Outcome
- grain yield and HIe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yield and HI was the highest under both seed rate of 34 and 46 g/m2.”
t0“RICE VARIETIES”
Claim · model-written summary
Adding 200 kg N/ha produced the greatest grain yield and yield components.
- Taxon
- RICE VARIETIESOryza sativat0
- Treatment
- 200 kg N/hae0
- Outcome
- grain yield and its componentse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Adding 200 kg N/ha produced the greatest grain yield and its components.”
t0“RICE VARIETIES”
Claim · model-written summary
SK2046H reached maximum panicle density and thousand-grain weight at 34 g/m2 plus 200 kg N/ha.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2046H (H2)e0
- Treatment
- 34 g/m2 with 200 kg N/hae0
- Outcome
- Number of panicles/m2 and 1000-grain weighte0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Number of panicles/m2 and 1000-grain weight of SK2046H (H2) reached to maximum value under seed rate of 34 g/m2 with 200 kg N/ha.”
t0“RICE VARIETIES”
Claim · model-written summary
SK2034H had the most filled grains per panicle at 34 g/m2 and 200 kg N/ha.
- Taxon
- RICE VARIETIESOryza sativat0
- Material
- SK2034H (H1)e0
- Treatment
- 34 g/m2 and fertilized by 200 kg N/hae0
- Outcome
- Filled grains/paniclee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Filled grains/panicle reached to the highest value when SK2034H (H1) variety under the seed rate of 34 g/m2 and fertilized by 200 kg N/ha.”
t0“RICE VARIETIES”
Claim · model-written summary
Both hybrids had their best grain yield and harvest index at 34 or 46 g/m2 combined with 200 kg N/ha.
- Taxon
- RICE VARIETIESOryza sativat0
- Treatment
- 34 and 46 g/m2 combined with 200 kg N/hae0
- Outcome
- Grain yielde0
- Direction
- beste0
- Qualifier
- The same trend was obtained with harvest index (HI)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield of both hybrids (H1 and H2) was the best under the seed rates of 34 and 46 g/m2 combined with 200 kg N/ha. The same trend was obtained with harvest index (HI).”
t0“RICE VARIETIES”
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