摘要 : Proper fertilization of golf course putting greens during grow-in provides rapid turfgrass cover, high quality putting surfaces, and limits environmental impacts. Different levels of N and K were applied to 'TifDwarf' and 'TifEagl... 展开 Proper fertilization of golf course putting greens during grow-in provides rapid turfgrass cover, high quality putting surfaces, and limits environmental impacts. Different levels of N and K were applied to 'TifDwarf' and 'TifEagle' bermudagrasses [Cynodon dactylon (L.) Pers. x C. transvaalensis Burt Davy], 'SeaDwarf' seashore paspalum (Paspalum vaginatum Swartz), and 'PristineFlora' zoysiagrass [Zoysia japonica Stued. by Zoysia tenuifolia (L.) Mem], sprigged at a rate of 36.6 m(3) ha(-1) on a USGA-specified green, to compare grow-in rate and qualitative turfgrass characteristics. Fertilizer treatments included 1.2, 2.4, 3.7, or 4.9 g N m(-2) wk(-1), and a one-time application of polymer-coated urea (PCU) at 39.1 g N m(-2), with each N rate coinciding with four N/K fertilization ratios: 1:1, 1:2, 1:3, or 1:4. Visual measurements of grow-in rate were generally similar within cultivars with 2.4, 3.7, or 4.9 g N m(-2) wk(-1). There were no significant effects for turfgrass growth or quality among N/K treatments. The 2.4 g N m(-2) wk(-1) rate was considered best for rapid establishment of all cultivars. Although 1.2 g N m(-2) wk(-1) amended turfgrass was slower to establish, this rate provided a more desirable putting surface and further decreased the potential for nutrient leaching. 收起