Advancing Sustainable Strawberry Cultivation: A Synthesis of Cultivar Selection, Production Systems, and Environmental Strategies

Strawberry (Fragaria × ananassa) is a globally cherished fruit, esteemed for its sensory qualities and nutritional contributions. The burgeoning demand for high-quality, year-round production has driven innovations in cultivar breeding, cultivation practices, and environmental management. This comprehensive synthesis integrates recent research findings to elucidate current paradigms and future perspectives in strawberry cultivation, emphasizing sustainability, technological advancement, and soil health.

Historically, strawberry cultivation has evolved from traditional open-field systems to sophisticated protected environments, driven by climate variability, pest and disease pressures, and consumer preferences. The genetic diversity among cultivars, coupled with technological innovations such as plastic tunnels, hydroponic systems, and soil disinfestation methods, has expanded the cultivation window and improved fruit quality. Concurrently, environmental concerns regarding plastic use, chemical inputs, and soil health necessitate sustainable practices. Recent studies underscore the importance of integrating biological, chemical, and technological strategies to optimize yield and minimize ecological footprints.

Effective cultivar selection remains central to optimizing production in diverse environments. The classification of strawberries into long-day, short-day, and day-neutral types informs planting schedules and management practices tailored to specific latitudes and climate conditions:

• Short-day (June-bearing) cultivars, such as Camarosa, dominate in temperate regions, initiating flowering under short photoperiods to produce a concentrated harvest in late spring or early summer. These cultivars are preferred for their high yield and fruit quality, especially in California and Italy.

• Day-neutral varieties like Albion and Portola are increasingly favored for their continuous fruiting over extended periods, suitable for protected environments and off-season production.

• Regional adaptations are ongoing; for instance, Florida Brilliance and Florida Radiance are tailored for subtropical climates, offering early yields and resilience against environmental stresses.

Breeding programs focus on enhancing traits such as cold tolerance, disease resistance, and fruit quality. For example, ‘Sabrina’ and ‘Camarosa’ have demonstrated robust performance in the southeastern US, while ‘Mohawk’ and ‘Evita’ excel in European protected systems.

Traditional open-field cultivation is susceptible to climatic extremes and pest pressures, often necessitating chemical fumigation. Protected systems—such as high tunnels, glasshouses, and hydroponics—offer control over environmental variables, leading to:

• Earlier and extended harvests, capturing premium market prices.

• Enhanced fruit quality, through temperature and humidity regulation.

• Reduced pesticide reliance, by minimizing pathogen and pest ingress.

The phase-out of methyl bromide has prompted research into alternative soil disinfestation methods:

• Soil solarization employs high temperatures generated by polyethylene covers during peak summer to suppress soil pathogens.

• Steam application effectively reduces weeds and soilborne fungi, but costs and logistical challenges limit large-scale adoption.

• Anaerobic soil disinfestation (ASD) involves organic amendments, such as rice husks or manure, creating oxygen-depleted conditions that inhibit pathogens. While promising, further refinement is needed to optimize efficacy and reduce resource inputs.

• Biological control agents, notably Bacillus spp., have been shown to restore beneficial microbial populations post-fumigation, suppress pathogens, and promote plant health.

The shift toward soilless cultivation, including hydroponic and substrate-based systems (peat, coconut coir, rockwool), enhances resource use efficiency and disease control. Research indicates:

• Optimized substrates improve aeration, water retention, and microbial activity.

• Organic fertilizers, such as potassium humate and microbial inoculants, stimulate beneficial microbiota, improve soil nutrient cycling, and enhance plant vigor.

• Sensor-based irrigation and precision fertilization reduce water and nutrient waste, supporting sustainable intensification.

Artificial lighting, especially LEDs, enables off-season production and uniform flowering. Adjusting light spectra (blue, red) influences fruit size, sugar accumulation, and phytochemical content, optimizing both yield and nutritional quality.

The soil microbiome is pivotal in nutrient cycling, disease suppression, and plant growth. Recent high-throughput sequencing studies reveal:

• Fertilizer applications post-fumigation can restore beneficial taxa such as Bacillus, Actinomycetes, and Chloroflexi, enhancing soil resilience.

• Microbial diversity correlates inversely with pathogen abundance; higher diversity often equates to improved disease suppression.

• Biological amendments promote beneficial microbes, which outcompete or inhibit pathogens like Fusarium and Phytophthora, leading to healthier plants and higher yields.

The manipulation of microbial communities through organic inputs and management practices offers a promising pathway toward sustainable strawberry production.

Recent LCAs comparing open-field and protected systems identify:

• Environmental impacts are predominantly linked to energy consumption (electricity, natural gas) and plastic waste.

• Protected systems (greenhouses, high tunnels) may reduce land use and pesticide inputs but entail higher energy costs.

• Biodegradable mulches derived from biodegradable polymers (e.g., PBAT blended with cassava starch) offer promising alternatives to polyethylene, reducing plastic waste and environmental burden.

Cost analyses demonstrate:

• Protected systems and use of organic fertilizers with biological control can be profitable, especially when market premiums are considered.

• High initial investments and operational costs (energy, labor) challenge large-scale adoption, but technological advancements (robotics, sensor systems) are poised to improve efficiency.

• Crop rotation, cultivar choice, and resource management are critical in balancing productivity and sustainability.

The trajectory of strawberry cultivation is characterized by:

• Breeding resilient, high-yielding cultivars suited for diverse environments, including low-chill and day-neutral types.

• Integrating biological control and organic amendments to reduce chemical inputs while maintaining high productivity.

• Advancing protected cultivation technologies, such as automated harvesting, precision irrigation, and optimized lighting, to reduce labor costs and environmental impacts.

• Developing biodegradable materials for mulching and packaging, aligning with circular economy principles.

• Expanding research on soil microbiome management, climate adaptation, and resource optimization to ensure sustainable industry growth.

Strawberry production stands at an intersection of innovation, environmental stewardship, and economic viability. Cultivar development, advanced cultivation systems, and microbiome management collectively contribute to resilient, sustainable practices. Embracing integrated strategies that balance productivity with ecological and social responsibilities will be essential in meeting future demands and mitigating climate change impacts.

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