Abstract
Fertilizer recommendations are needed to increase organic vegetable yields. Thus, organic lettuce growth and nutrient uptake was investigated in a randomized block pot experiment with twelve treatments from the factorial structure of three factors: (i) Gafsa phosphate [0 and 200 kg phosphorus pentoxide (P 2 O 5 ) ha -1 ], (ii) compost from source separated municipal organic waste (0, 15, and 30 t ha -1 ) and (iii) limestone [0 and 8 t ha -1 calcium carbonate (CaCO 3 ) equivalent]. Lettuce yield increased with compost application and a first order interaction between lime and phosphate was clear because lime partially replaced the need for phosphate. This was explained by the effect of liming on P availability in acid soils. Nitrogen (N), phosphorus (P), and potassium (K) accumulation increased in lettuces produced with compost or phosphate but only the accumulation of N was increased with lime. This compost is recommended to increase nutrient availability for organic lettuce whereas the need for phosphate fertilization may decrease with liming.
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Claims 8
Claim · model-written summary
Compost application increased lettuce yield.
- Taxon
- Lettuce
Lactuca sativae0 - Treatment
- compost applicatione0
- Outcome
- Lettuce yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lettuce yield increased with compost application”
Claim · model-written summary
Lime partly replaced the need for phosphate.
- Taxon
- LettuceLactuca sativat0
- Treatment
- limee0
- Outcome
- need for phosphatee0
- Direction
- partially replacede0
- Comparator
- phosphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lime partially replaced the need for phosphate”
t0“Lettuce”
Claim · model-written summary
Liming affected phosphorus availability in acid soils.
- Taxon
- LettuceLactuca sativat0
- Treatment
- liminge0
- Outcome
- P availabilitye0
- Qualifier
- acid soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effect of liming on P availability in acid soils”
t0“Lettuce”
Claim · model-written summary
Compost increased nitrogen, phosphorus and potassium accumulation in lettuce.
- Taxon
- lettucesLactuca sativae0
- Treatment
- composte0
- Outcome
- Nitrogen (N), phosphorus (P), and potassium (K) accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen (N), phosphorus (P), and potassium (K) accumulation increased in lettuces produced with compost or phosphate”
Claim · model-written summary
Phosphate increased nitrogen, phosphorus and potassium accumulation in lettuce.
- Taxon
- lettucesLactuca sativae0
- Treatment
- phosphatee0
- Outcome
- Nitrogen (N), phosphorus (P), and potassium (K) accumulatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen (N), phosphorus (P), and potassium (K) accumulation increased in lettuces produced with compost or phosphate”
Claim · model-written summary
Lime increased nitrogen accumulation in lettuce.
- Taxon
- LettuceLactuca sativat0
- Treatment
- limee0
- Outcome
- accumulation of Ne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only the accumulation of N was increased with lime”
t0“Lettuce”
Claim · model-written summary
The authors recommend compost to increase nutrient availability for organic lettuce.
Verbatim
e0“This compost is recommended to increase nutrient availability for organic lettuce”
Claim · model-written summary
The authors suggest phosphate fertilization may decrease with liming.
- Taxon
- LettuceLactuca sativat0
- Treatment
- liminge0
- Outcome
- need for phosphate fertilizatione0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the need for phosphate fertilization may decrease with liming”
t0“Lettuce”
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