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GrowPlex

Type: Humic and fluvic acids, Company: Earthgreen Products

Effect

Decreased produce quality

GrowPlex treated Turkish Hazelnut grown in containers filled with pine-bark substrate had a 45 % smaller height growth, a 43.3% smaller stem diameter growth, had 39.7% less leaf dry mass and 32.4% less shoot dry mass, the roots were 68.7% shorter as compared to the untreated control. (All results were significant, but there was no significant relation between the fertilizer rate and biostimulant treatment)

Trial details
indoor, greenhouse, pine-bark substrate in 3.8L containers, 3 different slow-release fertilizer rates
USA

Crop

Turkish hazelnut, Corylus colurna L.

Trial application

Method
Root soak
Timing
At transplanting
Rate
30 mL in 4 L water, 30 min root soak
Kelting, M., Harris, J.R., Fanelli, J., Appleton, B., & Niemiera, A.
1997
Humate-Based Biostimulants Do Not Consistently Increase Growth of Container-Grown Turkish Hazelnut
J. Environ. Hort.
15
197-199
Crop group