What question did this study set out to answer?

To assess how soilless cultivation systems, electrical conductivity levels, and pre-harvest nitrogen deprivation affect yield, nitrate accumulation, and quality in baby-leaf lettuce and endive across multiple seasons.

April 29, 2021Frontiers in Plant ScienceOpen Access

Reduction of Nitrate Content in Baby-Leaf Lettuce and Cichorium endivia Through the Soilless Cultivation System, Electrical Conductivity and Management of Nutrient Solution

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Authors

GCGiulia ConversaUniversity of Foggia ABAnna BonasiaUniversity of Foggia CLCorrado LazzizeraUniversity of Foggia

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Implication

Controlled experiment reveals reduced nitrate accumulation in baby-leaf lettuce and endive, suggesting salinity and nutrient solution management optimize leaf nutritional quality.

Key Points

To assess how soilless cultivation systems, electrical conductivity levels, and pre-harvest nitrogen deprivation affect yield, nitrate accumulation, and quality in baby-leaf lettuce and endive across multiple seasons.
Tested baby-leaf lettuce and Cichorium endivia in ebb-and-flow (EF) and floating (FL) soilless systems at two nutrient solution electrical conductivity levels (EC 2.5 and 3.5 dS m⁻¹).
Evaluated crops across four seasonal cycles: autumn and early-spring for lettuce, and winter and late-spring for C. endivia.
Implemented pre-harvest nitrogen deprivation via nutrient solution withdrawal (3 days for lettuce, 6 days for C. endivia) at EC 2.5 in autumn and winter cycles.
In winter lettuce, the EF system and EC 3.5 treatment reduced leaf nitrate accumulation without decreasing yield, improving dry matter, carotenoids, and vitamin C; however, the combined EF/EC 3.5 treatment reduced yields due to salt stress and chloride accumulation.
Winter-grown C. endivia showed higher salt tolerance than lettuce, lowering nitrate levels under EC 3.5 and EF treatments with no reduction in yield or increase in chloride uptake.
Nitrogen deprivation effectively lowered tissue nitrates and enhanced leaf appearance and antioxidant quality, though it decreased yield in C. endivia and EF-grown lettuce.

Cite This Study

Conversa et al. (2021) studied this question.

synapsesocial.com/papers/6a70d1135d37378ac1ddf8a6 https://doi.org/10.3389/fpls.2021.645671

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Implication

Controlled experiment reveals reduced nitrate accumulation in baby-leaf lettuce and endive, suggesting salinity and nutrient solution management optimize leaf nutritional quality.

Reduction of Nitrate Content in Baby-Leaf Lettuce and Cichorium endivia Through the Soilless Cultivation System, Electrical Conductivity and Management of Nutrient Solution

Discussion

Member takes

Implication

Key Points

Cite This Study

Reduction of Nitrate Content in Baby-Leaf Lettuce and Cichorium endivia Through the Soilless Cultivation System, Electrical Conductivity and Management of Nutrient Solution

Discussion

Member takes

Implication

Key Points

Cite This Study

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