Potato farmers and seed growers across Scotland are eagerly looking for solutions to enhance tuber yields, particularly for seed production. A promising trial conducted by SAC Consulting, part of Scotland’s Rural College (SRUC), has provided groundbreaking insights that could help revolutionize seed potato production. The trial, which focused on the popular Innovator variety, showed impressive increases in tuber numbers through the use of specific biological products and innovative agronomic practices.
Collaborative Effort and Trial Objectives
The trial, led by Steven Jack of Organic Potato Growers and supported by key partners such as potato processor Lamb Weston and the SAC Association of Potato Producers (SACAPP), sought to find effective methods for increasing tuber numbers, a crucial factor for seed growers. “We wanted to test products and techniques that would help boost tuber yields in seed crops,” explained Kyran Maloney, senior potato consultant at SAC.
The trial utilized a split-plot design, cultivating seed potatoes in de-stoned beds and applying a quad planting system on traditional ridges. This method allowed more space for root expansion, potentially enhancing tuber numbers, as confirmed by existing research.
Trial Methodology
Six different approaches were tested on two potato varieties—Innovator and Ivory Russet. The interventions included:
- Standard agronomy practices
- Increased seed rates (which showed minimal impact)
- Physical interventions such as tipping potatoes between boxes and using black plastic coverings post-planting
- Calfite Extra applications, a foliar nutrient complex designed to improve plant health
- Luxor applications, a biostimulant applied in-furrow and as a foliar treatment
- Phosta applications, a soil agent to unlock phosphate and promote tuber development
Key Findings
The trial revealed some significant results:
- Luxor applications increased tuber numbers by over 30%, showcasing the powerful role of biostimulants in promoting tuber formation.
- Phosta applications led to a 20%+ increase in tuber numbers.
- Tipping and covering techniques resulted in a 24% increase in tuber numbers, offering practical methods for improving yields.
- Calfite Extra contributed to a 13% increase in tuber numbers.
Interestingly, Ivory Russet did not show statistically significant results, highlighting the complex interaction between variety and treatment effectiveness.
Addressing the Challenge of Seed Multiplication
With modern potato varieties increasingly bred for processing rather than seed production, many are naturally inclined to produce fewer tubers. This trend presents a challenge for seed growers who rely on high tuber counts for their crops. By targeting products like Luxor, Phosta, and Calfite Extra, the trial aimed to overcome this issue and boost seed crop production.
“Maximizing tuber numbers is critical for seed crops,” said Andrew Cromie of Unium Bioscience, who was involved in the trial. “Our goal is to support seed growers by offering products that enhance phosphate availability and overall plant health, which in turn increases tuber numbers.”
Potential Benefits and Future Research
The results of this trial offer significant promise, not only for Scottish seed growers but for farmers across the UK. The combination of Luxor, Phosta, and physical interventions has proven effective in at least one variety (Innovator), raising hopes for increased productivity and improved sustainability.
However, experts stress the importance of ongoing trials to verify these findings and refine the application techniques. “These results are beneficial for growers, but more research is needed to confirm the long-term benefits and consistency of these approaches,” added Andy Steven, Agrovista agronomist.
This Scottish potato trial offers a glimpse into the future of seed potato production. By applying a combination of agronomic practices and biostimulants, farmers can potentially achieve higher yields, improving the economic viability of potato farming. With further research and continued collaboration, these methods could play a key role in meeting the growing demand for high-quality seed potatoes, while enhancing sustainability in the sector.
