中文摘要：

【目的】探明氮肥和Trinexapac-ethyl（TE）配合施用对草地早熟禾草坪生长的影响。【方法】在草地早熟禾返青后,采用完全随机区组设计,氮肥设0（N1）、20（N2）、25（N3）和30（N4）kg·ha-14个水平,每月施1次;TE设0（T1）、312.5（T2）和625（T3）ml·ha-13个水平,每10d喷施1次,测定氮肥和TE配合施用对草坪株高、产草量及叶绿素含量的影响。【结果】施氮能显著促进草坪生长,而喷施TE能够显著抑制草坪的生长。在不同的氮肥水平上,T2处理能够降低草坪新增株高、剪草量达30%左右,T3处理能够降低草坪新增株高、剪草量达45%左右。在保证正常需要的同时,N2T3、N3T3、N4T3处理的草坪生长较慢。氮与TE的交互作用对草坪颜色有极显著影响;相同氮水平处理中,T3处理草坪草叶绿素含量显著高于T1处理;N4T3处理草坪颜色最深。【结论】以草坪生长与叶绿素含量为评判的依据,最好的组合为N2T3、N4T3,它们均能使草坪生长减慢而且颜色加深。

英文摘要：

[Objective] The aim of the experiment is to evaluate the effects of N and Trinexapac-ethyl （TE） on the growth of Kentucky bluegrass. [ Method] By using the method of randomized blocks design, the effects of four N levels, 0（N1）, 20（N2）, 25（N3）, 30（N4） kg·ha^-1-monthl, with TE at 0（T1）, 312.5（T2） and 625（T3） ml.haL10 dl on the total height, clippings and chlorophyll concentration of Kentucky bluegrass were evaluated. [ Result] Total height and total clippings of Kentucky bluegrass decreased when treated with TE and increased when treated with N. Kentucky bluegrass treated with T2 and T3 had total clippings and total height decreased by 30% and 45% under different N application levels. Kentucky bluegrass grew slowly in the treatments of N2T3, N3T3, N4T3. The N×TE interaction was significant for the chlorophyll concentrations of Kentucky bluegrass. The chlorophyll concentration of Kentucky bluegrass treated with T3 was significantly higher than those of Kentucky bluegrass treated with T1 at the same N level. The chlorophyll concentrations ofturfgrass treated with N4T3 was the hightest. [Conclusion] Based on the index of turfgrowth and the chlorophyll concentration, the best treatment are N2T3, N4T3, as are expected to get the less clippings and the darker green.