Abstract
Abstract Although the application of organic amendment (OA) is a well-established agricultural practice, the effectiveness, optimal concentration, and key characteristics of OA-derived dissolved organic matter (DOM) in promoting the growth and nutrient accumulation of lettuce are not fully understood. To gain a better understanding, the effect of OA-derived DOM that was prepared from rapeseed oil cake (ROC) on the growth of lettuce was examined. Lettuce seedlings (7 days old) were transplanted into a hydroponic nutrient solution with varying DOM concentrations (10, 20, and 30 mg C L –1 ) along with the control treatment (no DOM addition), and shoot and root growth of lettuce was recorded and nutrient accumulation in lettuce was analyzed after 14 days. Compared to the control treatment, the soil and plant analyzer development value, shoot fresh weight, shoot dry weight, and leaf area were significantly greater ( P < 0.05) in 20 mg C L –1 DOM concentration, while the maximum leaf width was significantly higher ( P < 0.05) in 10 mg C L –1 DOM concentration. The root fresh weight, root dry weight, root length, root surface area, and number of lateral roots were significantly greater ( P < 0.05) in 20 mg C L –1 DOM concentration than in the control treatment. DOM concentrations of 20 and/or 10 mg C L –1 also resulted in enhanced carbon, phosphorus, potassium, sulfur, silicon, and boron contents in lettuce. Overall, these findings suggest that ROC-derived DOM can promote growth and nutrient accumulation in lettuce seedlings, with 20 and/or 10 mg C L –1 being suitable concentrations.
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Claims 8
Claim · model-written summary
At 20 mg C L –1 DOM, lettuce soil and plant analyzer development value, shoot fresh weight and shoot dry weight were significantly greater than control.
- Taxon
- lettuce seedlings (Lactuca sativa L.)
Lactuca sativat0 - Organ / stage
- shoote0
- Treatment
- 20 mg C L –1 DOM concentratione0
- Outcome
- soil and plant analyzer development value, shoot fresh weight, shoot dry weighte0
- Direction
- greatere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to the control treatment, the soil and plant analyzer development value, shoot fresh weight, shoot dry weight, and leaf area were significantly greater ( P < 0.05) in 20 mg C L –1 DOM concentration”
t0“lettuce seedlings (Lactuca sativa L.)”
Claim · model-written summary
At 20 mg C L –1 DOM, lettuce leaf area was significantly greater than control.
- Taxon
- lettuce seedlings (Lactuca sativa L.)Lactuca sativat0
- Treatment
- 20 mg C L –1 DOM concentratione0
- Outcome
- leaf areae0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaf area were significantly greater ( P < 0.05) in 20 mg C L –1 DOM concentration”
t0“lettuce seedlings (Lactuca sativa L.)”
Claim · model-written summary
At 10 mg C L –1 DOM, maximum lettuce leaf width was significantly higher.
- Taxon
- lettuce seedlings (Lactuca sativa L.)Lactuca sativat0
- Treatment
- 10 mg C L –1 DOM concentratione0
- Outcome
- maximum leaf widthe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum leaf width was significantly higher ( P < 0.05) in 10 mg C L –1 DOM concentration”
t0“lettuce seedlings (Lactuca sativa L.)”
Claim · model-written summary
At 20 mg C L –1 DOM, lettuce root fresh weight, dry weight and length were significantly greater than control.
- Taxon
- lettuce seedlings (Lactuca sativa L.)Lactuca sativat0
- Treatment
- 20 mg C L –1 DOM concentratione0
- Outcome
- root fresh weight, root dry weight, root lengthe0
- Direction
- greatere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root fresh weight, root dry weight, root length, root surface area, and number of lateral roots were significantly greater ( P < 0.05) in 20 mg C L –1 DOM concentration than in the control treatment”
t0“lettuce seedlings (Lactuca sativa L.)”
Claim · model-written summary
At 20 mg C L –1 DOM, lettuce root surface area and lateral root number were significantly greater than control.
- Taxon
- lettuce seedlings (Lactuca sativa L.)Lactuca sativat0
- Treatment
- 20 mg C L –1 DOM concentratione0
- Outcome
- root surface area, and number of lateral rootse0
- Direction
- greatere0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root surface area, and number of lateral roots were significantly greater ( P < 0.05) in 20 mg C L –1 DOM concentration than in the control treatment”
t0“lettuce seedlings (Lactuca sativa L.)”
Claim · model-written summary
DOM at 20 and/or 10 mg C L –1 enhanced lettuce carbon, phosphorus and potassium contents.
- Taxon
- lettuceLactuca sativae0
- Treatment
- DOM concentrations of 20 and/or 10 mg C L –1e0
- Outcome
- carbon, phosphorus, potassiume0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DOM concentrations of 20 and/or 10 mg C L –1 also resulted in enhanced carbon, phosphorus, potassium, sulfur, silicon, and boron contents in lettuce”
Claim · model-written summary
DOM at 20 and/or 10 mg C L –1 enhanced lettuce sulfur, silicon and boron contents.
- Taxon
- lettuceLactuca sativae0
- Treatment
- DOM concentrations of 20 and/or 10 mg C L –1e0
- Outcome
- sulfur, silicon, and boron contentse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DOM concentrations of 20 and/or 10 mg C L –1 also resulted in enhanced carbon, phosphorus, potassium, sulfur, silicon, and boron contents in lettuce”
Claim · model-written summary
The authors suggest 20 and/or 10 mg C L –1 ROC-derived DOM as suitable for lettuce seedlings.
- Taxon
- lettuce seedlingsLactuca sativae0
- Treatment
- ROC-derived DOMe0
- Outcome
- 20 and/or 10 mg C L –1 being suitable concentrationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, these findings suggest that ROC-derived DOM can promote growth and nutrient accumulation in lettuce seedlings, with 20 and/or 10 mg C L –1 being suitable concentrations”
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See all 21 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.