Abstract
Rice was grown on a transitional redbrown earth for 3 consecutive seasons and irrigated with saline groundwater of salinities 0.25, 0.5, 1.0, 1.5 and 2.0 dS/m. A 4.0 dS/m treatment was applied in the final year. Grain yield was only affected by the 4.0 dS/m treatment, where a 25% yield reduction occurred. Soil salinities increased with increasing salinity of applied treatments, reaching equilibrium after 3 years. The higher salinity treatments resulted in significantly increased rice field water consumption, attributed to increased infiltration rates. The presence of high electrolyte levels in the soil surface prevented any detrimental effect of increased soil sodium levels on soil properties. However, the communal supply system with potential cultivation of salt-sensitive species such as soybean, along with the potential for higher groundwater accessions, suggests that the salinity of irrigation water should be maintained as low as possible.
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Claims 5
Claim · model-written summary
Only irrigation at 4.0 dS/m reduced rice grain yield, by 25%.
Not reportedTaxonComparator
Verbatim
e0“Grain yield was only affected by the 4.0 dS/m treatment, where a 25% yield reduction occurred”
Claim · model-written summary
Soil salinity rose with applied irrigation salinity and equilibrated after three years.
- Treatment
- salinity of applied treatmentse0
- Outcome
- Soil salinitiese0
- Direction
- increasede0
- Qualifier
- after 3 yearse0
Not reportedTaxon
Verbatim
e0“Soil salinities increased with increasing salinity of applied treatments, reaching equilibrium after 3 years”
Claim · model-written summary
Higher irrigation salinity significantly increased rice field water consumption.
- Taxon
- rice
Oryza sativae0 - Treatment
- higher salinity treatmentse0
- Outcome
- rice field water consumptione0
- Direction
- increasede0
- Qualifier
- increased infiltration ratese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher salinity treatments resulted in significantly increased rice field water consumption, attributed to increased infiltration rates”
Claim · model-written summary
High surface electrolyte levels prevented detrimental effects of increased soil sodium on soil properties.
- Outcome
- detrimental effect of increased soil sodium levels on soil propertiese0
- Qualifier
- high electrolyte levels in the soil surfacee0
Not reportedTaxon
Verbatim
e0“The presence of high electrolyte levels in the soil surface prevented any detrimental effect of increased soil sodium levels on soil properties”
Claim · model-written summary
The authors recommend keeping irrigation water salinity as low as possible.
- Outcome
- salinity of irrigation water should be maintained as low as possiblee0
Not reportedTaxon
Verbatim
e0“the salinity of irrigation water should be maintained as low as possible”
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salinity · physiology: water · Oryza sativa (rice)Positive and negative results
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