Abstract
Many vegetable growers in Japan practice a unique waterlogged cultivation method with ample nitrogen (N) supply and microbial supplements, reporting vigorous plant growth, no soilborne diseases, and high yields. We simulated waterlogged soil conditions in greenhouse experiments to examine effects of soil pH and redox potential (Eh) as well as microbial influence on the growth of tomato seedlings. Soil pasteurization enhanced seedling growth whether the acidic, volcanic soil was waterlogged or well-drained. Among various antimicrobials, only soil treatment with polymyxin B improved shoot growth in nonpasteurized soil. The seedlings grew best in pasteurized acidic, waterlogged soil fertilized with ample potassium nitrate (KNO3), which maintained soil Eh above zero. In nonpasteurized soil, growth was severely stunted by raising soil pH progressively to 8.5 while Eh dropped to –194 mV. The results suggested that heat-sensitive Gram-negative soil bacteria and low soil Eh were key factors limiting the growth potential of tomato plants in waterlogged soils.
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Claims 5
Claim · model-written summary
Soil pasteurization enhanced tomato seedling growth in both waterlogged and well-drained acidic volcanic soil.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- Soil pasteurizatione0
- Outcome
- seedling growthe0
- Direction
- enhancede0
- Qualifier
- whether the acidic, volcanic soil was waterlogged or well-drainede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“Soil pasteurization enhanced seedling growth whether the acidic, volcanic soil was waterlogged or well-drained”
Claim · model-written summary
Among various antimicrobials, only soil treatment with polymyxin B improved shoot growth of tomato in nonpasteurized soil.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- soil treatment with polymyxin Be0
- Outcome
- shoot growthe0
- Direction
- improvede0
- Qualifier
- in nonpasteurized soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“only soil treatment with polymyxin B improved shoot growth in nonpasteurized soil”
Claim · model-written summary
Tomato seedlings grew best in pasteurized acidic waterlogged soil fertilized with ample potassium nitrate, which kept soil Eh above zero.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- pasteurized acidic, waterlogged soil fertilized with ample potassium nitrate (KNO3)e0
- Outcome
- seedlings grew beste0
- Qualifier
- maintained soil Eh above zeroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“The seedlings grew best in pasteurized acidic, waterlogged soil fertilized with ample potassium nitrate (KNO3), which maintained soil Eh above zero”
Claim · model-written summary
In nonpasteurized soil, tomato growth was severely stunted when soil pH was raised progressively to 8.5, while Eh dropped to –194 mV.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- raising soil pH progressively to 8.5e0
- Outcome
- growthe0
- Direction
- severely stuntede0
- Qualifier
- Eh dropped to –194 mVe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“tomato”
e0“In nonpasteurized soil, growth was severely stunted by raising soil pH progressively to 8.5 while Eh dropped to –194 mV”
Claim · model-written summary
The authors suggest heat-sensitive Gram-negative soil bacteria and low soil Eh were key factors limiting tomato growth potential in waterlogged soils.
- Taxon
- tomatoSolanum lycopersicume0
- Interactor
- heat-sensitive Gram-negative soil bacteriae0other
- Outcome
- growth potentiale0
- Qualifier
- low soil Eh were key factors limitinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“heat-sensitive Gram-negative soil bacteria and low soil Eh were key factors limiting the growth potential of tomato plants in waterlogged soils”
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