Abstract
The use of organic amendments in agriculture could sustain crop production and preserve the agroecosystem, due to their importance in the conservation of organic matter in soil. The objective of this research was to evaluate the effects of differing organic fertilizers and of previous crops on lettuce growth, nutritional status and yields. The effects on soil characteristics were further investigated. The research was carried out during two years (2006 and 2007) at Metaponto (MT) in southern Italy, on lettuce crops cultivated after eggplant and melon to avoid their continuous cropping. The effects of application of a mineral fertilizer (MF), and of three treatments with organic fertilizers (commercial stable manure - OM; anaerobic digestate based on wine distillery wastewater - AD; composted municipal solid organic wastes coming from the separate collection - MSW) were studied. Head average weight, leaf area index, nitrate content and SPAD readings during the cropping cycles did not show significant differences among fertilizer treatments. On the contrary, marketable yield and head average weight at the harvest presented significantly different among the three organic fertilizers. The average marketable yield and head average weight of organic fertilizers experimental (AD and MSW treatments) decreased of 16 and 17%, respectively, compared to OM treatment. The previous melon crop influenced positively all analyzed parameters of the lettuce compared with previous eggplant crop. The previous melon crop reached the highest marketable yield with an increase of 59% compared with previous eggplant crop. Compared to the mineral fertilizer, the organic ones significantly increased the extracted fraction of soil organic carbon (6.9, 10.7 and 14.9% for OM, AD and MSW, respectively), without significant changes for the humic and fulvic content.
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Claims 9
Claim · model-written summary
Head average weight, leaf area index, nitrate content and SPAD readings did not differ significantly among fertilizer treatments during cropping cycles.
- Taxon
- LETTUCE
Lactuca sativat0 - Treatment
- fertilizer treatmentse0
- Outcome
- Head average weight, leaf area index, nitrate content and SPAD readingse0
- Direction
- did not show significant differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Head average weight, leaf area index, nitrate content and SPAD readings during the cropping cycles did not show significant differences among fertilizer treatments”
t0“LETTUCE”
Claim · model-written summary
Average marketable yield under AD and MSW decreased 16% relative to OM.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- AD and MSW treatmentse0
- Outcome
- marketable yielde0
- Direction
- decreasede0
- Value
- 16e0
- Comparator
- OM treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average marketable yield and head average weight of organic fertilizers experimental (AD and MSW treatments) decreased of 16 and 17%, respectively, compared to OM treatment”
t0“LETTUCE”
Claim · model-written summary
Average head weight under AD and MSW decreased 17% relative to OM.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- AD and MSW treatmentse0
- Outcome
- head average weighte0
- Direction
- decreasede0
- Value
- 17%e0
- Comparator
- OM treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average marketable yield and head average weight of organic fertilizers experimental (AD and MSW treatments) decreased of 16 and 17%, respectively, compared to OM treatment”
t0“LETTUCE”
Claim · model-written summary
Previous melon improved all analyzed lettuce parameters relative to previous eggplant.
- Taxon
- lettuceLactuca sativae0
- Treatment
- previous melon crope0
- Outcome
- all analyzed parameters of the lettucee0
- Direction
- positivelye0
- Comparator
- previous eggplant crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The previous melon crop influenced positively all analyzed parameters of the lettuce compared with previous eggplant crop”
Claim · model-written summary
Previous melon increased lettuce marketable yield by 59% compared with previous eggplant.
- Taxon
- lettuceLactuca sativae1
- Treatment
- previous melon crope0
- Outcome
- marketable yielde0
- Direction
- increasee0
- Value
- 59%e0
- Comparator
- previous eggplant crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The previous melon crop reached the highest marketable yield with an increase of 59% compared with previous eggplant crop”
e1“the lettuce”
Claim · model-written summary
OM increased extracted soil organic carbon by 6.9% against mineral fertilizer.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- OMe0
- Outcome
- extracted fraction of soil organic carbone0
- Direction
- increasede0
- Value
- 6.9e0
- Comparator
- mineral fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the mineral fertilizer, the organic ones significantly increased the extracted fraction of soil organic carbon (6.9, 10.7 and 14.9% for OM, AD and MSW, respectively)”
t0“LETTUCE”
Claim · model-written summary
AD increased extracted soil organic carbon by 10.7% against mineral fertilizer.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- ADe0
- Outcome
- extracted fraction of soil organic carbone0
- Direction
- increasede0
- Value
- 10.7e0
- Comparator
- mineral fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the mineral fertilizer, the organic ones significantly increased the extracted fraction of soil organic carbon (6.9, 10.7 and 14.9% for OM, AD and MSW, respectively)”
t0“LETTUCE”
Claim · model-written summary
MSW increased extracted soil organic carbon by 14.9% against mineral fertilizer.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- MSWe0
- Outcome
- extracted fraction of soil organic carbone0
- Direction
- increasede0
- Value
- 14.9%e0
- Comparator
- mineral fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the mineral fertilizer, the organic ones significantly increased the extracted fraction of soil organic carbon (6.9, 10.7 and 14.9% for OM, AD and MSW, respectively)”
t0“LETTUCE”
Claim · model-written summary
Organic fertilizers did not significantly change soil humic and fulvic content.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- organic onese0
- Outcome
- humic and fulvic contente0
- Direction
- without significant changese0
- Comparator
- mineral fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the mineral fertilizer, the organic ones significantly increased the extracted fraction of soil organic carbon (6.9, 10.7 and 14.9% for OM, AD and MSW, respectively), without significant changes for the humic and fulvic content”
t0“LETTUCE”
The same questions in other papers
fertilization · physiology: pigments · Lactuca sativa (garden lettuce)Results differ
3 papers in the same direction as this paper · 37 in the opposite direction
- positive
- positive
- positive
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See all 41 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.