Abstract
Abstract Background Grape pomace (GP) is a by‐product of wineries after filtering the grape juice for wine production. GP contains seeds, pulp, skin, and stalks with acidic properties, and it is normally composted before using as a soil amendment. However, composting GP requires more time, labor, and equipment; furthermore, composting loses some of the desirable organic acids for arid soils. The acidic properties of these organic acids and the plant nutrients in GP make it a desirable amendment for arid soils in both non‐composted and composted forms. Aim This study investigates the potential of directly applying GP as a soil amendment and its impact on arid soil health and plant performance. Methods To test the potential of non‐composted GP as a soil amendment, greenhouse and field studies were conducted by combining GP with existing management practices (manure application for soil used in the greenhouse study and fertigation for the field study) to assess the effects of GP on soil health and crop (maize, wheat, and grape) performance. Results Adding 5% GP to an alkaline soil significantly increased maize and wheat growth and shoot nutrient concentrations in the greenhouse and grapes in the field (48% yield increase). The significance of GP on maize, wheat, and grapes was associated with soil nutrient enhancements (i.e., nutrients supplied, increase in organic matter and microbial biomass increase, reduction in pH, and better nutrient mobilization). Conclusion GP has the potential for direct use as a soil amendment for soil and crop health improvement, especially in arid soils with high pH and limited soil organic matter.
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Claims 5
Claim · model-written summary
Adding 5% grape pomace to an alkaline soil significantly increased maize growth and shoot nutrient concentrations in the greenhouse.
- Treatment
- Adding 5% GP to an alkaline soile1
- Outcome
- growth and shoot nutrient concentrationse1
- Direction
- increasede1
- Setting
- greenhousee1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Adding 5% GP to an alkaline soil significantly increased maize and wheat growth and shoot nutrient concentrations in the greenhouse and grapes in the field (48% yield increase)”
Claim · model-written summary
Adding 5% grape pomace to an alkaline soil significantly increased wheat growth and shoot nutrient concentrations in the greenhouse.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- Adding 5% GP to an alkaline soile1
- Outcome
- growth and shoot nutrient concentrationse1
- Direction
- increasede1
- Setting
- greenhousee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Adding 5% GP to an alkaline soil significantly increased maize and wheat growth and shoot nutrient concentrations in the greenhouse and grapes in the field (48% yield increase)”
Claim · model-written summary
Adding 5% grape pomace to an alkaline soil increased grape yield by 48% in the field.
- Taxon
- grapese1
- Treatment
- Adding 5% GP to an alkaline soile1
- Outcome
- yielde1
- Direction
- increasee1
- Value
- 48%e1
- Setting
- fielde1
Not reportedComparator
Verbatim
e1“Adding 5% GP to an alkaline soil significantly increased maize and wheat growth and shoot nutrient concentrations in the greenhouse and grapes in the field (48% yield increase)”
Claim · model-written summary
The effects of grape pomace on maize, wheat and grapes were associated with soil nutrient enhancements.
Verbatim
e2“The significance of GP on maize, wheat, and grapes was associated with soil nutrient enhancements (i.e., nutrients supplied, increase in organic matter and microbial biomass increase, reduction in pH, and better nutrient mobilization)”
Claim · model-written summary
Grape pomace has potential for direct use as a soil amendment for soil and crop health, especially in arid soils.
Verbatim
t0“Grape pomace's potential on semi‐arid soil health enhances performance of maize, wheat, and grape crops”
e3“GP has the potential for direct use as a soil amendment for soil and crop health improvement, especially in arid soils with high pH and limited soil organic matter”
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1 paper in the same direction as this paper
- positive
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.