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Yale University New Haven, Connecticut 06511

SCHOOL OF FORESTRY & ENVIRONMENTAL STUDIES Greeley Memorial Laboratory 370 Prospect Street   THE EFFECT OF ROOTS® ON GROWTH OF CELERY ‘GIANT PASCAL’ IN GREENHOUSE CONDITIONS INTRODUCTION A greenhouse test was performed at the Greeley Greenhouse at the Yale School of Forestry and Environmental Studies. The objective was to evaluate the effect of ROOTS®, a new growth biostimulant developed by Soilizer Corporation with the support of Yale School of Forestry and Environmental Studies on celery seedlings. The tests was performed on Apium graveolens cv. ‘Giant Pascal’ seedlings under greenhouse conditions. Commercial celery seeds were germinated in a sand tray and when they were approximately 4 cm height they were transplanted to one-gallon pots, three seedlings per pot. Twelve pots were treated and twelve were the control. One application of ROOTS® was made at the moment of transplanting, another six weeks later and a third six weeks later. Each application was at the rate of about 1 gallon per acre. Total amount applied reached 1 ml of master solution per plant diluted 100 to 1 in water. A fertilization was made in all the pots starting the experiment with 2 grams/gallon of water of a 15-30-15 soluble commercial formula at drench. Twenty weeks after transplanting, plants were harvested and shoot and root fresh weight were measured. Data were analyzed with Statview II for one factor analysis of variance for repeated measures. RESULTS After twenty weeks of growth, celery plants var. Giant Pascal treated with ROOTS® showed significant (P<0.Ol) higher values Of both shoot and root fresh weights. Table 1.  Shoot and root growth of celery ‘Giant Pascal’  plants treated with ROOTStm in greenhouse         ROOTStm CONTROL INCREMENT INC. % Shoot Fresh Weight (g) 377.0 233.6 143.4** 61.4% Root Fresh Weight (g) 92.3 64.3 28.0** 43.5%

N=12 pots; 3 plants per pot; **P<O.O1

 

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