Abstract
Abstract Salinity is a major abiotic stress limiting crop growth and reducing grain yield. In recent years, little progress was made in salt‐tolerant cultivation techniques. Therefore, a controlled experiment was conducted to study the effects of nitrogen management (NM) on growth, antioxidant ability, and yield performance of salt‐tolerant rice ( Oryza sativa L.) under salinity stress. Three salinity levels (0‰ as control; 0.75‰, 4.3 dS m −1 ; and 1.5‰, 7.7 dS m −1 ) and four levels of NM (tillering fertilizer/panicle initiation fertilizer = 7:3, 6:4, 5:5, and 4:6) were arranged in this study. Under salinity stress, plant height, tiller number, fresh weight, grain yield, panicle, spikelets per panicle, grain weight, and soluble sugar content in stem were significantly decreased. In contrast, antioxidant parameters of superoxide dismutase, peroxidase, and catalase were significantly increased. Grain filling percentage and sucrose content were slightly changed. Compared to the control, grain yield was reduced by 45.6%, 34.8%, 60.4%, and 46.7% at the ratio of 7:3, 6:4, 5:5, and 4:6 NM at 0.75‰ salinity level, and 73.5%, 59.7%, 74.8%, and 61.7% at 1.5‰ salinity level, respectively. The highest yield was generated by 6:4 NM at both the 0.75‰ and 1.5‰ salinity level, and the lowest by 4:6 and 5:5. However, NM could obviously alleviate the inhibition effects of salinity stress and improve antioxidant ability of rice. Among them, 6:4 NM performed the best alleviation effects, followed by 7:3 and 5:5 NM. This study suggests that the appropriate NM can effectively alleviate salinity stress and increase grain yield.
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Claims 18
Claim · model-written summary
Salinity significantly decreased rice growth and yield traits.
- Taxon
- rice
Oryza sativat0 - Treatment
- salinity stresse0
- Outcome
- plant height, tiller number, fresh weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salinity stress, plant height, tiller number, fresh weight, grain yield, panicle, spikelets per panicle, grain weight, and soluble sugar content in stem were significantly decreased.”
t0“rice”
Claim · model-written summary
Salinity significantly decreased grain yield and related traits.
- Taxon
- riceOryza sativat0
- Treatment
- salinity stresse0
- Outcome
- grain yield, panicle, spikelets per paniclee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salinity stress, plant height, tiller number, fresh weight, grain yield, panicle, spikelets per panicle, grain weight, and soluble sugar content in stem were significantly decreased.”
t0“rice”
Claim · model-written summary
Salinity significantly decreased grain weight and stem soluble sugar.
- Taxon
- riceOryza sativat0
- Treatment
- salinity stresse0
- Outcome
- grain weight, and soluble sugar content in steme0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salinity stress, plant height, tiller number, fresh weight, grain yield, panicle, spikelets per panicle, grain weight, and soluble sugar content in stem were significantly decreased.”
t0“rice”
Claim · model-written summary
Antioxidant enzyme parameters increased significantly under salinity.
- Outcome
- antioxidant parameters of superoxide dismutase, peroxidase, and catalasee0
- Direction
- increasede0
Not reportedTaxonTreatmentComparator
Verbatim
e0“antioxidant parameters of superoxide dismutase, peroxidase, and catalase were significantly increased.”
Claim · model-written summary
Grain filling percentage and sucrose content changed slightly.
Not reportedTaxon
Verbatim
e0“Grain filling percentage and sucrose content were slightly changed.”
Claim · model-written summary
At 0.75‰ salinity, yield declined 45.6% with 7:3 nitrogen management.
Not reportedTaxonComparator
Verbatim
e0“grain yield was reduced by 45.6%, 34.8%, 60.4%, and 46.7% at the ratio of 7:3, 6:4, 5:5, and 4:6 NM at 0.75‰ salinity level”
Claim · model-written summary
At 0.75‰ salinity, yield declined 34.8% with 6:4 nitrogen management.
Not reportedTaxonComparator
Verbatim
e0“grain yield was reduced by 45.6%, 34.8%, 60.4%, and 46.7% at the ratio of 7:3, 6:4, 5:5, and 4:6 NM at 0.75‰ salinity level”
Claim · model-written summary
At 0.75‰ salinity, yield declined 60.4% with 5:5 nitrogen management.
Not reportedTaxonComparator
Verbatim
e0“grain yield was reduced by 45.6%, 34.8%, 60.4%, and 46.7% at the ratio of 7:3, 6:4, 5:5, and 4:6 NM at 0.75‰ salinity level”
Claim · model-written summary
At 0.75‰ salinity, yield declined 46.7% with 4:6 nitrogen management.
Not reportedTaxonComparator
Verbatim
e0“grain yield was reduced by 45.6%, 34.8%, 60.4%, and 46.7% at the ratio of 7:3, 6:4, 5:5, and 4:6 NM at 0.75‰ salinity level”
Claim · model-written summary
At 1.5‰ salinity, yield declined 73.5% with 7:3 nitrogen management.
Not reportedTaxonComparatorOutcomeDirection
Verbatim
e0“73.5%, 59.7%, 74.8%, and 61.7% at 1.5‰ salinity level, respectively.”
Claim · model-written summary
At 1.5‰ salinity, yield declined 59.7% with 6:4 nitrogen management.
Not reportedTaxonComparatorOutcomeDirection
Verbatim
e0“73.5%, 59.7%, 74.8%, and 61.7% at 1.5‰ salinity level, respectively.”
Claim · model-written summary
At 1.5‰ salinity, yield declined 74.8% with 5:5 nitrogen management.
Not reportedTaxonComparatorOutcomeDirection
Verbatim
e0“73.5%, 59.7%, 74.8%, and 61.7% at 1.5‰ salinity level, respectively.”
Claim · model-written summary
At 1.5‰ salinity, yield declined 61.7% with 4:6 nitrogen management.
Not reportedTaxonComparatorOutcomeDirection
Verbatim
e0“73.5%, 59.7%, 74.8%, and 61.7% at 1.5‰ salinity level, respectively.”
Claim · model-written summary
The 6:4 nitrogen regime produced the highest yield at both salinity levels.
Not reportedTaxon
Verbatim
e0“The highest yield was generated by 6:4 NM at both the 0.75‰ and 1.5‰ salinity level”
Claim · model-written summary
The 4:6 and 5:5 regimes produced the lowest yields.
Not reportedTaxon
Verbatim
e0“and the lowest by 4:6 and 5:5.”
Claim · model-written summary
Nitrogen management alleviated salinity inhibition and improved antioxidant ability.
- Taxon
- riceOryza sativae0
- Treatment
- NMe0
- Outcome
- antioxidant abilitye0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NM could obviously alleviate the inhibition effects of salinity stress and improve antioxidant ability of rice.”
Claim · model-written summary
The 6:4 regime had the best alleviation, followed by 7:3 and 5:5.
Not reportedTaxon
Verbatim
e0“6:4 NM performed the best alleviation effects, followed by 7:3 and 5:5 NM.”
Claim · model-written summary
The authors recommend suitable nitrogen management to alleviate salinity and increase yield.
Not reportedTaxon
Verbatim
e0“appropriate NM can effectively alleviate salinity stress and increase grain yield.”
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See all 167 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.