Abstract
Seaweed (fresh, dry) or its products (extracts, composts, soil conditioners) have been long used in agriculture to enhance plant growth and productivity. In this study, we evaluated the effects that seaweed composts at different doses and degree of maturation had on the yield of tomatoes (Licopersicon esculentum Mill. cv. platense) grown on a horticultural soil in northeastern Patagonia. We used 10 tomato plants per treatmentplot set in a randomized block design. Treatments were: 1) soil without amendment, control (S); 2) 5 kg m−2 of compost aged 9 months (C9-5); 3) 10 kg m−2 of compost aged 9 months (C9-10); 4) 5 kg m−2 of compost aged 20 months (C20-5); and 5) 10 kg m−2 of compost aged 20 months (C20-10). Total weight and number of tomatoes, and aerial plant biomass (excluding fruits) were significantly higher for the compost treatments than those of the control. Also, compost treated plants bore mature fruits, in average, 9 days earlier and presented higher resistance to diseases than controls. The weight of tomatoes per plant grown in C20 was significantly higher than that of C9, differences that could be attributed to the lower salinity of compost C20 (C20 and C9 electrical conductivities were 1.5 and 15 dS m−1, respectively). The increased yield and resistance to diseases on tomato plants by addition of seaweed compost appear to be related to a complex number of factors not yet fully understood. It seems, however, that a combination of higher nutrient availability (mainly P) due to slight increases in pH of the soil amended, together with increases in readily available K and an improvement in soil physical conditions (increase in pore size and probably amelioration of hydric conditions), may have been responsible for the higher production of seaweed amended plots as compared to the control.
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Claims 8
Claim · model-written summary
Seaweed compost increased total tomato weight versus unamended soil.
- Taxon
- tomatoes
Solanum lycopersicume0 - Treatment
- compost treatmentse0
- Outcome
- Total weighte0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total weight and number of tomatoes, and aerial plant biomass (excluding fruits) were significantly higher for the compost treatments than those of the control”
Claim · model-written summary
Seaweed compost increased tomato number versus unamended soil.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- compost treatmentse0
- Outcome
- number of tomatoese0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total weight and number of tomatoes, and aerial plant biomass (excluding fruits) were significantly higher for the compost treatments than those of the control”
Claim · model-written summary
Seaweed compost increased aboveground tomato biomass excluding fruit versus unamended soil.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- compost treatmentse0
- Outcome
- aerial plant biomass (excluding fruits)e0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total weight and number of tomatoes, and aerial plant biomass (excluding fruits) were significantly higher for the compost treatments than those of the control”
Claim · model-written summary
Compost-treated tomatoes matured about nine days earlier than controls.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- composte0
- Outcome
- mature fruitse0
- Direction
- earliere0
- Value
- 9 dayse0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compost treated plants bore mature fruits, in average, 9 days earlier and presented higher resistance to diseases than controls”
t0“tomatoes (Licopersicon esculentum Mill. cv. platense)”
Claim · model-written summary
Compost-treated tomato plants showed higher disease resistance than controls.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- composte0
- Outcome
- resistance to diseasese0
- Direction
- highere0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compost treated plants bore mature fruits, in average, 9 days earlier and presented higher resistance to diseases than controls”
t0“tomatoes (Licopersicon esculentum Mill. cv. platense)”
Claim · model-written summary
Tomato weight per plant was higher with C20 compost than with C9 compost.
- Taxon
- tomatoesSolanum lycopersicume0
- Treatment
- C20e0
- Outcome
- weight of tomatoes per plante0
- Direction
- highere0
- Comparator
- C9e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The weight of tomatoes per plant grown in C20 was significantly higher than that of C9”
Claim · model-written summary
C20 compost had lower electrical conductivity than C9 compost, at 1.5 versus 15 dS m−1.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- electrical conductivitiese0
- Direction
- lowere0
- Value
- 1.5 and 15 dS m−1e0
- Comparator
- C9e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lower salinity of compost C20 (C20 and C9 electrical conductivities were 1.5 and 15 dS m−1, respectively)”
t0“tomatoes (Licopersicon esculentum Mill. cv. platense)”
Claim · model-written summary
Authors suggest improved nutrient availability, potassium availability, and soil physical conditions may explain higher tomato production with compost.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- higher productione0
- Qualifier
- a combination of higher nutrient availability (mainly P) due to slight increases in pH of the soil amended, together with increases in readily available K and an improvement in soil physical conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a combination of higher nutrient availability (mainly P) due to slight increases in pH of the soil amended, together with increases in readily available K and an improvement in soil physical conditions (increase in pore size and probably amelioration of hydric conditions), may have been responsible for the higher production of seaweed amended plots as compared to the control”
t0“tomatoes (Licopersicon esculentum Mill. cv. platense)”
The same questions in other papers
fertilization · disease · Solanum lycopersicum (tomato)Positive and negative results
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- no effect
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566 papers in the same direction as this paper · 93 in the opposite direction · 8 reporting no difference from an alternative
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See all 668 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.