Abstract
Abstract Compost is a source of plant nutrition that can be an alternative to, or used in conjunction with, synthetic fertilizers. Field trials were conducted in 2002 and 2004 to evaluate the effect of fertilizer types on yield and quality of tomato (Lycopersicon esculentumMill.). Compost-based fertilizer (CBF), derived from maize stover, cassava peels, and poultry manure, was applied at 5 Mt·ha−1 and combined with 0, 30 and 60 kg·ha−1 of N from urea, and compared with application of an N:P:K (20:10:10) synthetic fertilizer providing 30 and 60kgha_1 of N. Microbial populations were determined in the soil at the rhizoplane (root surface), rhizosphere (soil surrounding the root surface), and bulk soil (soil away from the root zone). Application of CBF alone increased fruit yield by 145% over controls and was significantly better than other treatments in 2002. Application of combinations of CBF +urea to tomato affected growth and quality of fruit. Titratable acidity in tomato grown with CBF alone slightly decreased in relation to tomato fertilized with 30 kg·ha−1 of the NPK fertilizer and vitamin C increased by 13%, while the Ca content was 44% greater than controls. Microbial populations found at the rhizosphere, rhizoplane, and bulk soil due to application of CBF, CBF +urea (30 or 60 kg·ha−1), and CBF +urea increased two to fivefold relative to treatment with 60 kg·ha−1 of synthetic NPK fertilizer. Organic fertilizer can be combined with synthetic fertilizer at rates below those recommended for sustainable production of tomato. However, other levels of urea need to be tested to determine whether addition of lower amounts of urea will consistently support yields.
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Claims 8
Claim · model-written summary
Compost-based fertilizer alone raised tomato fruit yield by 145% versus controls in 2002.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- CBF alonee0
- Outcome
- fruit yielde0
- Direction
- increasede0
- Value
- 145%e0
- Qualifier
- in 2002e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of CBF alone increased fruit yield by 145% over controls and was significantly better than other treatments in 2002”
e1“yield and quality of tomato”
Claim · model-written summary
Compost fertilizer with urea affected tomato growth and fruit quality.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- combinations of CBF +ureae0
- Outcome
- growth and quality of fruite0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of combinations of CBF +urea to tomato affected growth and quality of fruit”
Claim · model-written summary
CBF alone slightly lowered fruit titratable acidity compared with 30 kg·ha−1 NPK fertilizer.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CBF alonee0
- Outcome
- Titratable aciditye0
- Direction
- decreasede0
- Comparator
- tomato fertilized with 30 kg·ha−1 of the NPK fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Titratable acidity in tomato grown with CBF alone slightly decreased in relation to tomato fertilized with 30 kg·ha−1 of the NPK fertilizer”
Claim · model-written summary
CBF alone raised tomato fruit vitamin C by 13%.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CBF alonee0
- Outcome
- vitamin Ce1
- Direction
- increasede1
- Value
- 13%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato grown with CBF alone”
e1“vitamin C increased by 13%”
Claim · model-written summary
CBF alone raised tomato fruit calcium content by 44% versus controls.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CBF alonee0
- Outcome
- Ca contente1
- Direction
- greatere1
- Value
- 44%e1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tomato grown with CBF alone”
e1“the Ca content was 44% greater than controls”
Claim · model-written summary
Organic fertilizer treatments raised soil microbial populations two- to fivefold versus synthetic NPK fertilizer.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- CBF, CBF +urea (30 or 60 kg·ha−1), and CBF +ureae1
- Outcome
- Microbial populations found at the rhizosphere, rhizoplane, and bulk soile1
- Direction
- increasede1
- Value
- two to fivefolde1
- Comparator
- 60 kg·ha−1 of synthetic NPK fertilizere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield and quality of tomato”
e1“Microbial populations found at the rhizosphere, rhizoplane, and bulk soil due to application of CBF, CBF +urea (30 or 60 kg·ha−1), and CBF +urea increased two to fivefold relative to treatment with 60 kg·ha−1 of synthetic NPK fertilizer”
Claim · model-written summary
The authors concluded that organic fertilizer can be combined with below-recommended synthetic fertilizer for sustainable tomato production.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- Organic fertilizer can be combined with synthetic fertilizer at rates below those recommended for sustainable productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Organic fertilizer can be combined with synthetic fertilizer at rates below those recommended for sustainable production of tomato”
Claim · model-written summary
The authors recommended testing other urea levels to assess whether lower additions consistently support yields.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- other levels of urea need to be testede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield and quality of tomato”
e1“other levels of urea need to be tested to determine whether addition of lower amounts of urea will consistently support yields”
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