Abstract
A hydroponic culture was used to study different nitrogen and calcium supply patterns on biomass, nutritive, and safety quality of spinach seven days before harvesting. The results showed that the complete or partial withdrawal of nitrogen (N) and calcium (Ca) nutrient decreased spinach biomass compared to control (CK). At the same time, the withdrawal of N and Ca supply before harvesting increased vitamin C contents and decreased nitrate and oxalate content in edible parts of spinach. The decrease in spinach biomass could be partially compensated by the increase of the nutritive and safety quality of spinach and the reduced use of N and Ca nutrients.
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Claims 5
Claim · model-written summary
Complete or partial nitrogen and calcium withdrawal decreased spinach biomass relative to control.
- Taxon
- spinach
Spinacia oleraceae0 - Treatment
- complete or partial withdrawal of nitrogen (N) and calcium (Ca) nutriente0
- Outcome
- spinach biomasse0
- Direction
- decreasede0
- Comparator
- control (CK)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that the complete or partial withdrawal of nitrogen (N) and calcium (Ca) nutrient decreased spinach biomass compared to control (CK).”
Claim · model-written summary
Preharvest nitrogen and calcium withdrawal increased vitamin C in edible spinach parts.
- Taxon
- spinachSpinacia oleraceae0
- Organ / stage
- edible partse0
- Treatment
- withdrawal of N and Ca supply before harvestinge0
- Outcome
- vitamin C contentse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the withdrawal of N and Ca supply before harvesting increased vitamin C contents and decreased nitrate and oxalate content in edible parts of spinach”
Claim · model-written summary
Preharvest nitrogen and calcium withdrawal decreased nitrate in edible spinach parts.
- Taxon
- spinachSpinacia oleraceae0
- Organ / stage
- edible partse0
- Treatment
- withdrawal of N and Ca supply before harvestinge0
- Outcome
- nitratee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the withdrawal of N and Ca supply before harvesting increased vitamin C contents and decreased nitrate and oxalate content in edible parts of spinach”
Claim · model-written summary
Preharvest nitrogen and calcium withdrawal decreased oxalate in edible spinach parts.
- Taxon
- spinachSpinacia oleraceae0
- Organ / stage
- edible partse0
- Treatment
- withdrawal of N and Ca supply before harvestinge0
- Outcome
- oxalate contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the withdrawal of N and Ca supply before harvesting increased vitamin C contents and decreased nitrate and oxalate content in edible parts of spinach”
Claim · model-written summary
The authors interpret improved quality and reduced nutrient use as partial compensation for lost spinach biomass.
- Taxon
- spinachSpinacia oleraceae0
- Outcome
- decrease in spinach biomasse0
- Qualifier
- partially compensated by the increase of the nutritive and safety quality of spinach and the reduced use of N and Ca nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in spinach biomass could be partially compensated by the increase of the nutritive and safety quality of spinach and the reduced use of N and Ca nutrients.”
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