POLYON® - Nutrient Overdose Greenhouse Study
11/11/2021 - By Dr. Tom Reed
Study: | Effects of nutrient overdoses on HLB-infected Valencia on UFR-3 rootstock after 1 year |
Location: | Lake Alfred, FL |
Collaborator: | Jude Grosser, PhD (UF|IFAS CREC) |
Date: | 2015 |
Conclusion:
Preliminary greenhouse experiment to investigate the potential of micronutrient overdoses to improve the health of HLB-infected Valencia sweet orange on UFR-3 trees. Control treatments of biannual applied Harrell’s 16-5-10 blend or biweekly liquid fertilizer. Other treatments Harrell’s 16-5-10 blend supplemented with biannual treatments of triple recommended dose of Florikan or Tiger-Sul micronutrients. The treatment 16-5-10 blend with 3x Tiger-Sul Mn had the best visual results and longest average total root length determined by WinRHIZO (not statistically significant). The Harrell’s 16-5-10 blend alone had 24% greater average root length than biweekly liquid fertilizer (not statistically significant).
Figure 1: Greenhouse trees after one year: control standard liquid fertilizer (left) and Harrell’s 16-5-10 plus triple Tiger-Sul Mn (right).
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