Effect
Decreased produce quality
Crop Set treated Beech grown in usual conditions had on average a 10.5 % smaller girth, 2 % less leaf dry weight, 9.9 % less shoot dry weight, 19.1 % shorter roots, 12.9 % less root dry weight, a 9.2 % smaller root area and 9.5 % more chlorophyll compared to the untreated control. (Numbers are averages of different application methods and harvest moments (8 and 20 weeks after treatment); differences not significant)
Trial details
outdoor, unprotected, general tree compost in 5 L pots, no NPK fertilisers during trial
Scotland
Crop
Birch, Betula pendula
Trial application
Method
Foliar spray or root drench
Timing
Post transplanting when trees were in full leaf
Rate
12.5 mL/L water
2003
The influence of biostimulants on growth and vitality of tree urban tree species following transplanting
Arboricultural Journal
27
43-57
Crop group
