Abstract
Two hybrid rice varieties,IIYou 7 and Yuxiang 203,were tested in rice field with mid-low fertility under different nitrogen application level to study the effects on population composition and yield of hybrid rice varieties and provide a reference for rational nitrogen application in production of hybrid rice.The results showed that the yield of two tested varieties gradually increased with nitrogen increment within 0~150 kg/hm2 nitrogen level,but the yield presented a decline trend when nitrogen level was over150 kg/hm2.The yield and AE reached the highest when nitrogen level was 150 kg/hm2.The leaf area index of two tested rice varieties increased with increment of nitrogen level at heading stage.The high yield of two tested rice varieties could be obtained when the leaf area index of the rice population reached 7.The effective spike rate presented a decline trend with increment of nitrogen level and the effective spike rate was the lowest when nitrogen level was 210 kg/hm2.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Yield of both varieties increased as nitrogen rose within 0 to 150 kg/hm2.
- Taxon
- Rice
Oryza sativat0 - Treatment
- nitrogen increment within 0~150 kg/hm2 nitrogen levele0
- Outcome
- yield of two tested varietiese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of two tested varieties gradually increased with nitrogen increment within 0~150 kg/hm2 nitrogen level”
t0“Hybrid Rice”
Claim · model-written summary
Yield declined when nitrogen exceeded 150 kg/hm2.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen level was over150 kg/hm2e0
- Outcome
- yielde0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield presented a decline trend when nitrogen level was over150 kg/hm2”
t0“Hybrid Rice”
Claim · model-written summary
Yield was highest at 150 kg/hm2 nitrogen.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen level was 150 kg/hm2e0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield and AE reached the highest when nitrogen level was 150 kg/hm2.”
t0“Hybrid Rice”
Claim · model-written summary
AE was highest at 150 kg/hm2 nitrogen.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen level was 150 kg/hm2e0
- Outcome
- AEe0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield and AE reached the highest when nitrogen level was 150 kg/hm2.”
t0“Hybrid Rice”
Claim · model-written summary
Leaf area index at heading increased with nitrogen level.
- Taxon
- RiceOryza sativat0
- Organ / stage
- heading stagee0
- Treatment
- increment of nitrogen levele0
- Outcome
- leaf area indexe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The leaf area index of two tested rice varieties increased with increment of nitrogen level at heading stage.”
t0“Hybrid Rice”
Claim · model-written summary
High yield was obtained when rice leaf area index reached 7.
- Taxon
- RiceOryza sativat0
- Material
- two tested rice varietiese0
- Outcome
- high yielde0
- Direction
- highe0
- Qualifier
- leaf area index of the rice population reached 7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The high yield of two tested rice varieties could be obtained when the leaf area index of the rice population reached 7.”
t0“Hybrid Rice”
Claim · model-written summary
Effective spike rate declined as nitrogen level increased.
- Taxon
- RiceOryza sativat0
- Treatment
- increment of nitrogen levele0
- Outcome
- effective spike ratee0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effective spike rate presented a decline trend with increment of nitrogen level”
t0“Hybrid Rice”
Claim · model-written summary
Effective spike rate was lowest at 210 kg/hm2 nitrogen.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen level was 210 kg/hm2e0
- Outcome
- effective spike ratee0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effective spike rate was the lowest when nitrogen level was 210 kg/hm2”
t0“Hybrid Rice”
The same questions in other papers
nitrogen · growth · Oryza sativa (rice)Positive and negative results
401 papers in the same direction as this paper · 101 in the opposite direction · 8 reporting no difference from an alternative
- negative
- negative
- negative
507 papers more in this group
See all 511 papers →nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
- negative
- negative
- negative
2,041 papers more in this group
See all 2,045 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.