Using Cultural Practices and Leaf Mulch to Control Weeds in Established Turfgrass

摘要

Recent research has shown that leaves collected from a variety of tree species mulched into established turfgrass resulted in fewer common dandelions (Taraxacum officinale W.). However, the turfgrass in this research was managed at a low maintenance level to promote weed establishment. An experiment was initiated in October 2004 to develop a better understanding of how mulched leaves would effect dandelion populations in properly maintained turfgrass. The objective of this research was to quantify the effectiveness of leaf mulch as an organic weed control method when combined with frequent nitrogen fertilizer applications and a mowing height conducive to a cool-season turfgrass mixture. Research was initiated on 21 October 2004 in East Lansing, MI,on a sandy loam soil without irrigation. Main effects included leaf species, fertilization, and mowing height. Leaf species were sugar maple (Acer saccharum M.) and red maple (A. rubrum L.) applied at 1.5 kg/m? and a control. Fertilization included urea(46.0N-0.0P-0.0K) applied at 146.4 kg N per ha annually and a control. Mowing heights were 3.8 cm and 7.6 cm. Data collected in 2005 and 2006 included visual turfgrass quality (1-9 scale, 6 or greater acceptable), percent (0-100%) crabgrass (Digitaria sp