BIOSOLID INCLUSION IN SAND ROOT ZONE MEDIA FOR ESTABLISHMENT OF CV. TIFDWARF BERMUDAGRASS
Rapid grow-in of sprigged golf course greens reduces both costs associated with construction and time to first play. Two studies were conducted in south Florida to determine whether inclusion of an iron-rich activated sewage sludge biosolid in a United States Golf Association (USGA) root zone green mix would increase the rate of coverage of sprigged Tifdwarf bermudagrass (Cynodon dactylon × C. transvaalensis). The green was fitted with lysimeters for determining N and P leaching. Treatments included biosolid (Milorganite® 6-2-0) at 0, 3, and 6 kg m-3, with and without a supplement containing P, dolomite, soluble Mg and micronutrients. Biosolid incorporation into a USGA root zone mix improved the rate of coverage of fall and summer sprigged Tifdwarf bermudagrass, whether or not the mix was amended with supplements to provide various nutrient, and pH increase. The supplements primarily increased coverage rate in the absence of biosolid incorporation, but not to the degree that biosolid increased coverage in the absence of supplements. Total N leaching over the course of the two studies was not affected by biosolid. Biosolid did not affect P leaching, but supplements increased it. In both studies, when supplements were used there was a trend for reduced P leaching with increasing rates of biosolid inclusion in the root zone, in spite of the P contained in the biosolid.
Snyder, G.H. and Cisar, J.L. 2008. BIOSOLID INCLUSION IN SAND ROOT ZONE MEDIA FOR ESTABLISHMENT OF CV. TIFDWARF BERMUDAGRASS. Acta Hort. (ISHS) 783:463-474
nutrient leaching, nitrogen, phosphorus, Milorganite®