Waste-derived amendment design and its effectiveness in soil and grapevine sustainability
摘要
Sustainable agriculture promotes the use of local resources for management and production without diminishing crop profitability. This represents a challenge in the search for new products with lower environmental impact and fertilizer alternatives that meet the nutritional needs of crops. The objective of this study was to develop a tailored amendment, formulated and produced from recovered waste, and to evaluate its effectiveness in meeting the specific needs of the soil and the Vitis vinifera var. Red Globe crop.
MethodsThe amendment was formulated from agro-industrial waste (asparagus residue, four different types of bagasse, cattle manure, and ash) sourced within a 150-km radius from the production facility. Its response in a vineyard —1 ha per treatment— was compared against a mix of cattle and sheep manure (conventional amendment). Quality assessment was performed based on the soil’s physicochemical characteristics during the 615 days after application, and its response to the crop during the first year, using growth and productivity variables. Economic performance was assessed through a cost–benefit comparison of the two amendments transportation, production, application and product sells.
ResultsThe soil fertilized with the designed amendment showed improved nutritional status, with increased organic matter, nitrogen, and cation exchange capacity compared to both the control and pre-fertilization conditions. Vine growth and productivity parameters showed a significant increase in branch length, yield, bunch count per plant, and bunch weight, resulting in an increase of more than 9 Mg of grapes/ha with the designed amendment compared to the conventional one. Economic evaluation revealed a net gain exceeding USD 18,500 per hectare when using the designed amendment instead of the conventional manure, therefore the financial analysis also showed the opportunity for scaling it up in the sector.
ConclusionThe designed amendments based on the valorization of agro-industrial waste proved to be an appropriate solution for vineyard fertilization, contributing to improved its productivity and soil quality.