Abstract: Effects of fertilization on the quality of kentucky bluegrass turf was studied at an estab-lished turf for four yeare in scientific garden of China agricultural university.The fertilizer formulas with a3:2:2 ratio of N:P₂O₅:K₂O were used and three levels fertilization.The result show as follows:In fourfertilizer treatments, the turf grasses growth rata increased as the increasing quantity of fertilizers fertilizedtreatments made better turf greenness,but, decreased the turf uniformity and increased the degree of dis-ease as increasing of fertilizers.Considering both of turf greenness and uniformity, fertilized treatments of5g N + 3.3g P₂O₅ + 3.3g K₂O or 10g N + 6.6g P₂O₅ + 6.6g K₂O/m² with two times per year are betterfor kentucky bluegrass turf.The lasting high density of tiller was obtained by fertili zed wilh 10g N +6.6g P₂O₅ + 6.6g K₂O/m² with two times per year in kentucky bluegress turf.The higher undergrounbiomass was obtained by fertilized with 10g N + 6.7g P₂O₅ + 6.7g K₂O/m² two times per year withoutfertilizing.The number of the productive tillers decreased with the increasing of fertilizer quantity.

Key words: Kentucky bluegrass, Fertilization, Turf quality

摘要： 本试验是以不同施肥水平对建植四年的草地早熟禾草坪质量指标的影响进行了研究,结果表明,在四种施肥处理中,草地早熟禾的生长速度随着施肥量的增加而提高。施肥改善了草地早熟禾的颜色,但同时降低了草坪的整齐度,加重了病害。综合考虑应采用每次每平米5克氮、3.3克P₂O₅和3.3克K₂O或10克氮、6.7克P2O3和6.7克K₂O的施肥水平。其中每次每平米10充氮、6.7克P₂O₅和6.7克K₂O的施肥处理,草地早熟禾草坪分蘖密度最高。对照(不施肥)和每平方米施5克氮、3.3克P2O3和3.3克K₂O,草地早熟禾的地下生物量积累较高。草地早熟末的生殖枝数随着施肥水平的提高呈降低趋势。

关键词: 草地早熟禾, 施肥, 草坪质量