Field Trial - Root and Shoot Growth

Root and Shoot Growth Affected by Applications of Macro-Sorb® Foliar, Alone or in Combination with Macro-Sorb Radicular

Study conducted by Dr. R.E. Schmidt, Virginia Tech University 

Summary

This study was conducted on a creeping bentgrass (Agrostis stolonifera L.) putting green at Virginia Tech University.  Treatments included Macro-Sorb® Foliar applied at 2.0 fl oz./1000 ft2 alone, or in combination with Macro-Sorb® Radicular at 4.0 fl oz./1000 ft2, as well as an untreated control. Treatments were re-applied every 14 days from May 14 to Aug 6.  Throughout the course of the study, nitrogen was applied to the site at 0.4 lbs N/1000 ft2 monthly.  Following treatment applications, 10 cm diameter plugs were removed from each plot and allowed to grow for 6 weeks in soil maintained at a low moisture content (7%) before root and shoot growth measurements were taken.  Root length increased by at least 200% following applications of Macro-Sorb® treatments compared to the untreated control (Figure 1.).  In addition, root mass increased over 500% following applications of Macro-Sorb® Foliar + Radicular (Figure 2.) when compared to the untreated control.  While root growth significantly increased following Macro-Sorb® treatments, shoot growth was relatively similar to the untreated control (Figure 3.), indicating an increase in stored energy used for root development of creeping bentgrass when put under abiotic stresses.

Figure 1.  Effect of Macro-Sorb® Foliar alone or with Macro-Sorb® Radicular on Root Length of creeping bentgrass.

 

Figure 2. Effect of Macro-Sorb® Foliar alone or with Macro-Sorb® Radicular on Root Dry Weight of creeping bentgrass.

 

Figure 3.  Effect of Macro-Sorb® Foliar alone or with Macro-Sorb® Radicular on Shoot Fresh Weight of creeping bentgrass.