Abstract
The floating system is a successful strategy for producing baby leaf vegetables. Moreover, compost from agricultural and agri-food industry wastes is an alternative to peat that can be used as a component of growing media in this cultivation system. In this study, we experimented with three composts containing tomato (Solanum lycopersicum L.), leek (Allium porrum L.), grape (Vitis vinifera L.), and/or olive (Olea europaea L.) mill cake residues, which were used as the main component (75/25 volume/volume) of three growing media (GM1, GM2 and GM3) to evaluate their effect on the growth and quality of red baby leaf lettuce (Lactuca sativa L.). We used a commercial peat substrate as a control treatment (100% volume) and in mixtures (25% volume) with the composts. The plants were cultivated over two growing cycles, in spring and summer, and harvested twice in each cycle when the plants had four to five leaves. We found that the percentage of seed germination was significantly higher in plants grown in peat than in those grown in compost growing media. The yield was affected by the growing media in the summer cycle, and we obtained the highest value with GM1. Furthermore, the second cut was more productive than the first one for all the growing media in both cycles. The lettuce quality was also affected by the growing media. In general, the total phenolic content and antioxidant capacity in the leaves was higher in plants grown in the compost growing media, particularly in the second cut, but the nitrate content in the leaves was greater in some of the compost treatments compared with the peat treatment. In addition, an in vitro suppressive activity study demonstrated that the interaction between different fungi and bacteria observed through metagenomics analysis could contribute to the effectiveness of the compost in controlling Pythium irregulare. The use of compost as a component of the growing media in the production of baby leaf vegetables in a floating system does not only favor the crop yield and product quality, but also shows suppressive effects against P. irregulare.
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Claims 8
Claim · model-written summary
Peat gave significantly higher lettuce seed germination than compost growing media.
- Taxon
- Lactuca sativa L.
Lactuca sativae1 - Treatment
- peate0
- Outcome
- percentage of seed germinatione0
- Direction
- highere0
- Comparator
- compost growing mediae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“percentage of seed germination was significantly higher in plants grown in peat than in those grown in compost growing media.”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
GM1 produced the highest lettuce yield in the summer cycle.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- GM1e0
- Outcome
- yielde0
- Direction
- higheste0
- Qualifier
- summer cyclee0
- Comparator
- growing mediae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield was affected by the growing media in the summer cycle, and we obtained the highest value with GM1.”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
The second lettuce cut was more productive than the first across growing media and cycles.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Organ / stage
- second cute0
- Outcome
- productivee0
- Direction
- more productivee0
- Qualifier
- all the growing media in both cyclese0
- Comparator
- first onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the second cut was more productive than the first one for all the growing media in both cycles.”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
Lettuce leaves grown in compost media generally had higher total phenolic content and antioxidant capacity, especially at the second cut.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Organ / stage
- leavese0
- Treatment
- compost growing mediae0
- Outcome
- total phenolic content and antioxidant capacitye0
- Direction
- highere0
- Qualifier
- particularly in the second cute0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total phenolic content and antioxidant capacity in the leaves was higher in plants grown in the compost growing media, particularly in the second cut”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
Some compost treatments increased nitrate content in lettuce leaves relative to peat.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Organ / stage
- leavese0
- Treatment
- some of the compost treatmentse0
- Outcome
- nitrate contente0
- Direction
- greatere0
- Comparator
- peat treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the nitrate content in the leaves was greater in some of the compost treatments compared with the peat treatment.”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
Interactions among fungi and bacteria in compost may contribute to suppression of Pythium irregulare.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Interactor
- Pythium irregulareGlobisporangium irregularee0pathogen
- Outcome
- controlling Pythium irregularee0
- Qualifier
- interaction between different fungi and bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the interaction between different fungi and bacteria observed through metagenomics analysis could contribute to the effectiveness of the compost in controlling Pythium irregulare.”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
The authors conclude compost media can favor lettuce yield and product quality.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Treatment
- compost as a component of the growing mediae0
- Outcome
- crop yield and product qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of compost as a component of the growing media in the production of baby leaf vegetables in a floating system does not only favor the crop yield and product quality”
e1“red baby leaf lettuce (Lactuca sativa L.)”
Claim · model-written summary
The authors conclude compost media show suppression of P. irregulare.
- Taxon
- Lactuca sativa L.Lactuca sativae1
- Interactor
- P. irregulareGlobisporangium irregularee0pathogen
- Outcome
- suppressive effects against P. irregularee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but also shows suppressive effects against P. irregulare.”
e1“red baby leaf lettuce (Lactuca sativa L.)”
The same questions in other papers
fertilization · quality: phytochemicals · Lactuca sativa (garden lettuce)Positive and negative results
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See all 49 papers →growing medium · growth · Lactuca sativa (garden lettuce)Positive and negative results
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61 papers more in this group
See all 65 papers →in vitro · quality: phytochemicals · Lactuca sativa (garden lettuce)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.