Abstract
Abstract Compost run-off leachates are usually rich in nutrients and can potentially be recycled in plant culture. Seedlings of tomato (Lycopersicon esculentum Mill. ‘Roma VF’) and marigold (Tagetes erecta L. ‘Crackerjack’) were grown for five weeks in each of six hydroponic treatment solutions: full and half strength Hoagland's solution; leachates from spent mushroom compost (SMCL) and pond-collected runoff from a commercial composting operation (RCL); and these leachates amended with extra nitrogen (N) and phosphorus (P) (SMCL+NP and RCL+NP, respectively). The leachates were low in content of N and P, but rich in potassium (K), magnesium (Mg), calcium (Ca), sodium (Na), and various microelements. Top dry weight of tomato seedlings was highest in the two Hoagland's solutions, intermediate in RCL+NP, and lowest in the other solutions. With marigold, top dry weight in SMCL+NP was similar to that in the two Hoagland's solutions, intermediate in SMCL, and lowest in the RCL+NP and RCL solutions. The poor tomato performance on the SMCL+NP regime was the result of a high proportion of NH4-N ( < 50%), which over time lowered pH and caused nutritional disorders. Imbalance in tissue nutrient (low content of N and P and high content of K, Mg, Ca, and Na) from plants grown in the unamended SMCL and RCL solutions indicates a need to balance these nutrients in the leachates before it is recycled.
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Claims 12
Claim · model-written summary
Top dry weight of tomato seedlings was highest in the two Hoagland's solutions.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- the two Hoagland's solutionse0
- Outcome
- Top dry weight of tomato seedlingse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dry weight of tomato seedlings was highest in the two Hoagland's solutions, intermediate in RCL+NP, and lowest in the other solutions”
Claim · model-written summary
Top dry weight of tomato seedlings was intermediate in the RCL+NP leachate solution.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- RCL+NPe0
- Outcome
- Top dry weight of tomato seedlingse0
- Direction
- intermediatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dry weight of tomato seedlings was highest in the two Hoagland's solutions, intermediate in RCL+NP, and lowest in the other solutions”
Claim · model-written summary
Top dry weight of tomato seedlings was lowest in the other solutions (SMCL, SMCL+NP and RCL).
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- the other solutionse0
- Outcome
- Top dry weight of tomato seedlingse0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Top dry weight of tomato seedlings was highest in the two Hoagland's solutions, intermediate in RCL+NP, and lowest in the other solutions”
Claim · model-written summary
Marigold top dry weight in SMCL+NP was similar to that in the two Hoagland's solutions.
Verbatim
e0“With marigold, top dry weight in SMCL+NP was similar to that in the two Hoagland's solutions, intermediate in SMCL, and lowest in the RCL+NP and RCL solutions”
Claim · model-written summary
Marigold top dry weight was intermediate in SMCL.
Not reportedComparator
Verbatim
e0“With marigold, top dry weight in SMCL+NP was similar to that in the two Hoagland's solutions, intermediate in SMCL, and lowest in the RCL+NP and RCL solutions”
Claim · model-written summary
Marigold top dry weight was lowest in the RCL+NP and RCL solutions.
Not reportedComparator
Verbatim
e0“With marigold, top dry weight in SMCL+NP was similar to that in the two Hoagland's solutions, intermediate in SMCL, and lowest in the RCL+NP and RCL solutions”
Claim · model-written summary
The compost leachates were low in nitrogen and phosphorus content.
Not reportedTaxon
Verbatim
e0“The leachates were low in content of N and P”
Claim · model-written summary
The compost leachates were rich in potassium, magnesium, calcium, sodium and various microelements.
- Outcome
- potassium (K), magnesium (Mg), calcium (Ca), sodium (Na), and various microelementse0
- Direction
- riche0
Not reportedTaxon
Verbatim
e0“but rich in potassium (K), magnesium (Mg), calcium (Ca), sodium (Na), and various microelements”
Claim · model-written summary
The poor tomato performance on SMCL+NP resulted from a high proportion of NH4-N, which over time lowered pH and caused nutritional disorders.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- SMCL+NPe0
- Compound
- NH4-Ne0
- Outcome
- poor tomato performancee0
- Qualifier
- lowered pH and caused nutritional disorderse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The poor tomato performance on the SMCL+NP regime was the result of a high proportion of NH4-N ( < 50%), which over time lowered pH and caused nutritional disorders”
Claim · model-written summary
Plants grown in the unamended SMCL and RCL solutions had low tissue content of N and P.
- Taxon
- plantsViridiplantaee0
- Treatment
- unamended SMCL and RCL solutionse0
- Outcome
- content of N and Pe0
- Direction
- lowe0
Verbatim
e0“Imbalance in tissue nutrient (low content of N and P and high content of K, Mg, Ca, and Na) from plants grown in the unamended SMCL and RCL solutions”
Claim · model-written summary
Plants grown in the unamended SMCL and RCL solutions had high tissue content of K, Mg, Ca and Na.
- Taxon
- plantsViridiplantaee0
- Treatment
- unamended SMCL and RCL solutionse0
- Outcome
- content of K, Mg, Ca, and Nae0
- Direction
- highe0
Verbatim
e0“Imbalance in tissue nutrient (low content of N and P and high content of K, Mg, Ca, and Na) from plants grown in the unamended SMCL and RCL solutions”
Claim · model-written summary
The authors conclude that nutrients in the leachates need to be balanced before the leachates are recycled.
- Taxon
- plantsViridiplantaee0
- Outcome
- a need to balance these nutrients in the leachates before it is recyclede0
Verbatim
e0“plants grown in the unamended SMCL and RCL solutions indicates a need to balance these nutrients in the leachates before it is recycled”
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