Abstract
Drip irrigation offers potential for rice (Oryza sativa L.) production in regions where water resources are limited. However, farmers in China’s Xinjiang Province report that drip-irrigated rice seedlings sometimes suffer salt damage. The objective of this study was to learn more about the effects of soil salinity and soil temperature on the growth of drip-irrigated rice seedlings. The study consisted of a two-factor design with two soil salinity treatments (0 and 1.8 g kg−1 NaCl) and three soil temperature treatments (18°C, 28°C and 36°C). The results showed that shoot biomass, root biomass and root vigor were greatest when seedlings were grown with no salt stress (0 g kg−1 NaCl) at 28°C. Moderate salt stress (1.8 g kg−1 NaCl) combined with high temperature (36°C) significantly reduced root and shoot biomass by 39–53%. Moderate salt stress and high temperature also increased root proline concentration by 77%, root malonyldialdehyde concentration by 60% and seedling mortality by 60%. Shoot and root Na+ concentrations, shoot and root Na+ uptake and the Na+ distribution ratio in shoots were all the greatest when moderate salt stress was combined with high temperature. In conclusion, high soil temperature aggravates salt damage to drip-irrigated rice seedlings. Therefore, soil salinity should be considered before adopting drip-irrigation for rice production.
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Claims 13
Claim · model-written summary
Shoot biomass was greatest without salt at 28°C.
- Taxon
- rice seedlings
Oryza sativat0 - Treatment
- no salt stress (0 g kg−1 NaCl) at 28°Ce0
- Outcome
- shoot biomasse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot biomass, root biomass and root vigor were greatest when seedlings were grown with no salt stress (0 g kg−1 NaCl) at 28°C”
t0“rice seedlings”
Claim · model-written summary
Root biomass was greatest without salt at 28°C.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- no salt stress (0 g kg−1 NaCl) at 28°Ce0
- Outcome
- root biomasse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot biomass, root biomass and root vigor were greatest when seedlings were grown with no salt stress (0 g kg−1 NaCl) at 28°C”
t0“rice seedlings”
Claim · model-written summary
Root vigor was greatest without salt at 28°C.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- no salt stress (0 g kg−1 NaCl) at 28°Ce0
- Outcome
- root vigore0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root vigor were greatest when seedlings were grown with no salt stress (0 g kg−1 NaCl) at 28°C”
t0“rice seedlings”
Claim · model-written summary
Combined salt stress and 36°C reduced root biomass by 39–53%.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Moderate salt stress (1.8 g kg−1 NaCl) combined with high temperature (36°C)e0
- Outcome
- roote0
- Direction
- reducede0
- Value
- 39–53%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate salt stress (1.8 g kg−1 NaCl) combined with high temperature (36°C) significantly reduced root and shoot biomass by 39–53%”
t0“rice seedlings”
Claim · model-written summary
Combined salt stress and 36°C reduced shoot biomass by 39–53%.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Moderate salt stress (1.8 g kg−1 NaCl) combined with high temperature (36°C)e0
- Outcome
- shoot biomasse0
- Direction
- reducede0
- Value
- 39–53%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate salt stress (1.8 g kg−1 NaCl) combined with high temperature (36°C) significantly reduced root and shoot biomass by 39–53%”
t0“rice seedlings”
Claim · model-written summary
Combined stress increased root proline concentration by 77%.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Moderate salt stress and high temperaturee0
- Outcome
- root proline concentratione0
- Direction
- increasede0
- Value
- 77%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate salt stress and high temperature also increased root proline concentration by 77%”
t0“rice seedlings”
Claim · model-written summary
Combined stress increased root malonyldialdehyde concentration by 60%.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Moderate salt stress and high temperaturee0
- Outcome
- root malonyldialdehyde concentratione0
- Direction
- increasede0
- Value
- 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate salt stress and high temperature also increased root proline concentration by 77%, root malonyldialdehyde concentration by 60%”
t0“rice seedlings”
Claim · model-written summary
Combined stress increased seedling mortality by 60%.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- Moderate salt stress and high temperaturee0
- Outcome
- seedling mortalitye0
- Direction
- increasede0
- Value
- 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Moderate salt stress and high temperature also increased root proline concentration by 77%, root malonyldialdehyde concentration by 60% and seedling mortality by 60%”
t0“rice seedlings”
Claim · model-written summary
Shoot and root Na+ concentrations were greatest under combined stress.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- moderate salt stress was combined with high temperaturee0
- Outcome
- Shoot and root Na+ concentrationse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root Na+ concentrations, shoot and root Na+ uptake and the Na+ distribution ratio in shoots were all the greatest when moderate salt stress was combined with high temperature”
t0“rice seedlings”
Claim · model-written summary
Shoot and root Na+ uptake were greatest under combined stress.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- moderate salt stress was combined with high temperaturee0
- Outcome
- shoot and root Na+ uptakee0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot and root Na+ concentrations, shoot and root Na+ uptake and the Na+ distribution ratio in shoots were all the greatest when moderate salt stress was combined with high temperature”
t0“rice seedlings”
Claim · model-written summary
Shoot Na+ distribution ratio was greatest under combined stress.
- Taxon
- rice seedlingsOryza sativat0
- Treatment
- moderate salt stress was combined with high temperaturee0
- Outcome
- Na+ distribution ratio in shootse0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Na+ distribution ratio in shoots were all the greatest when moderate salt stress was combined with high temperature”
t0“rice seedlings”
Claim · model-written summary
High soil temperature aggravated salt damage.
- Taxon
- rice seedlingsOryza sativae0
- Treatment
- high soil temperaturee0
- Outcome
- salt damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high soil temperature aggravates salt damage to drip-irrigated rice seedlings”
Claim · model-written summary
Soil salinity should be considered before adopting drip irrigation for rice.
- Taxon
- riceOryza sativae0
- Outcome
- soil salinity should be considered before adopting drip-irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil salinity should be considered before adopting drip-irrigation for rice production”
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See all 107 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.