The 27th Green Expert Platform (GEP) hosted by Grodan brought together a diverse group of crop consultants and technical specialists, sparking intense discussions on the cutting edge of high-tech horticulture. With a focus on root-zone dynamics, nutrient strategies, and water quality, the event delved into some of the industry's most pressing technical challenges.
The Future of Horticulture: Unlocking the Secrets of Plant Growth
The GEP, established in 2009, has consistently aimed to create a knowledge-sharing environment where experts can openly discuss the latest trends and innovations. This year's event emphasized the importance of an open forum, with Andrew Lee, Knowledge Manager at Grodan, noting the free exchange of questions and ideas.
The day began with a tour of Grodan's low-energy trials at Botany BV, in partnership with Philips Horticulture LED Solutions. Delegates explored strategies for generative plant development in full-LED winter crops, especially in low radiant heat conditions. Andrew highlighted the role of nutrient steering in these scenarios, explaining how generative plant steering with low nitrate and adjusted potassium feed recipes becomes crucial in full LED environments.
Energy Efficiency and Active Dehumidification
Energy reduction strategies are shaping the future of greenhouse design, and Andrew pointed to a promising development: active dehumidification systems. Grodan's trials with Philips LED Solutions have demonstrated the value of this approach in low-heat settings, and Andrew predicts wider adoption as growers seek to decouple humidity control from heating requirements.
Water Quality: A Complex Challenge
Water quality and the management of recycled water were key topics of discussion. Andrew summarized the consensus: there is no simple solution to water quality issues, whether treating drain water or maintaining clean irrigation systems. The regulatory landscape in the Netherlands, with its strict emission rules, underscores the need for practical, scalable solutions.
One emerging trend is the increased use of peroxide in irrigation systems. While peroxide plays a vital role in breaking down plant protection products in drain water, its frequent application inside irrigation lines requires further study. The group cautioned against over-reliance on peroxide, noting its potential impact on root health and interactions with plant protection products.
Plant Balance: A Complex Equation
Plant balance, a concept refined over two decades, remains a cornerstone of greenhouse decision-making. Consultants now have clear methodologies to measure plant responses and link them to climate, root-zone management, and labor practices. Data science companies like Source Ag are accelerating these insights, but Andrew stressed the need for larger sample sizes. He believes imaging technology in greenhouse control could be the key to future precision-based steering.
Root Zone Microbiomes: Unlocking the Secrets
The root-zone microbiome generated lively discussions among delegates. It was emphasized that microbial life is abundant in all growing systems, and plants actively influence microbial composition through root exudates. However, defining an optimal microbiome remains a challenge. Andrew stated that substrate type plays a significant role in shaping microbial populations, with stone wool supporting bacteria and coco systems favoring fungi.
Industry Crossroads: Water Treatment and Microbiological Management
Case studies presented by consultants indicated a broader theme: greenhouse horticulture is at a pivotal moment in its approach to water treatment and microbiological management. Andrew remarked that the industry is still learning how to measure and steer microbial communities, and with the decline in chemical plant protection products, growers will need new biological tools. However, the EU registration process for new bio-pesticides could take up to a decade.
The 27th GEP highlighted the complexity and innovation in high-tech horticulture. As the industry navigates these challenges, events like these provide a crucial platform for knowledge exchange and collaboration.
For more information, contact Andrew Lee at [email protected] or visit www.grodan.com.
