Abstract
Large quantities of green seaweed, linked probably to eutrophication, are cast ashore every summer on the Puerto Madryn beaches (Patagonia, Argentina, 42°S, 65°W). This algal biomass interferes with recreational uses of the beach, and therefore must be periodically collected and disposed. Part of this algal biomass was composted with the objective to produce an amendment to improve physical and nutritional characteristics of some local soils used in intensive horticulture, and at the same time to find a way to reduce environmental pollution. The compost was then biologically evaluated by determining the growth rate of tomato plants cultivated on various substrata (washed sand, sandy loam soil, and sandy loam soil plus inorganic fertilizers) to which different doses of compost were added. Results showed that in all cases the addition of compost increased water holding capacity and plant growth. The increase of tomato plants (Licopersicum esculentum var. platense) was proportional to the compost doses. Also, plants grown on sustrata containing at least ten percent compost had significant benefits compared to control plants, improving growth and water stress resistance. Although the quality of this seaweed compost was limited by excessive amounts of sand and low nitrogen content, it proved to be a good amendment that improved both physical and nutritional characteristics of local sandy loam soils used in intensive horticulture. According to these results, composting is a useful technology both to solve environmental pollution problems and to produce a valuable organic fertilizer for soils.
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Claims 7
Claim · model-written summary
Compost increased substrate water holding capacity.
Not reportedTaxon
Verbatim
e0“in all cases the addition of compost increased water holding capacity and plant growth”
Claim · model-written summary
Compost increased tomato plant growth.
- Taxon
- tomato plants
Solanum lycopersicume1 - Treatment
- addition of composte0
- Outcome
- plant growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in all cases the addition of compost increased water holding capacity and plant growth”
e1“tomato plants cultivated on various substrata”
Claim · model-written summary
Tomato plant increase was proportional to compost dose.
Verbatim
e0“The increase of tomato plants (Licopersicum esculentum var. platense) was proportional to the compost doses.”
Claim · model-written summary
At least ten percent compost significantly improved growth versus controls.
Verbatim
e0“plants grown on sustrata containing at least ten percent compost had significant benefits compared to control plants, improving growth and water stress resistance”
Claim · model-written summary
At least ten percent compost significantly improved water stress resistance versus controls.
Verbatim
e0“plants grown on sustrata containing at least ten percent compost had significant benefits compared to control plants, improving growth and water stress resistance”
Claim · model-written summary
Compost improved physical and nutritional properties of local sandy loam soils.
Not reportedTaxon
Verbatim
e0“it proved to be a good amendment that improved both physical and nutritional characteristics of local sandy loam soils used in intensive horticulture”
Claim · model-written summary
Composting was recommended for pollution control and organic fertilizer production.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- composting is a useful technologye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“composting is a useful technology both to solve environmental pollution problems and to produce a valuable organic fertilizer for soils”
e1“tomato plants cultivated on various substrata”
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See all 668 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.