【摘要】 [目的]研究磷、钾与多效唑配合施用对高羊茅越夏性的影响。[方法]以禾本科冷季型草坪草高羊茅为试材,采用裂裂区试验设计,分别设施磷肥40、50、80 kg/hm2、钾肥60、80、140 kg/hm2、多效唑0、250、500 mg/L,对处理后高羊茅的密度和株高进行方差分析,并用目测法定量描述其景观品质。[结果]磷肥、钾肥、多效唑单因素及磷肥与钾肥、磷肥与多效唑、钾肥与多效唑的两因素互作和磷肥与钾肥及多效唑的三因素互作对高羊茅密度和株高的影响均达显著水平。A2B3C2组合处理(磷60 kg/hm2、钾140 kg/hm2、多效唑250mg/L)的效果优于其他处理组合,高羊茅的株高和密度相对较高,景观品质总评分最佳。[结论]磷、钾施用量和多效唑浓度对高羊茅密度和株高有重要影响,肥料和化控的较优搭配可为高羊茅顺利越夏提供基础。更多还原

【Abstract】 [Objective] The purpose was to study the effects of combined application of P,K and paclobutrazol on over-summer ability of Festuca arundinacea.[Method] With gramineae F.arundinacea of cool-season turf grass as tested material,the experiment of split-split plot design with was adopted and three kinds of treatments were set up,including 40,50,80 kg/hm2 of P application,60,80,140 kg/hm2 of K application and 0,250,500 mg/L of paclobutrazol application resp.to conduct variance analysis on the density and plant height of F.arundinacea after treatment,and its landscape quality was in quantitative description with visual method.[Result] The effects of single factor of fertilizer of P,K and paclobutrazol,2-factor interaction of P and K fertilizer,P and paclobutrazol,K and paclobutrazol and 3-factor interaction of P,K and paclobutrazol on density and plant height of F.arundinacea all were reached to a significant level.The combined treatments of A2B3C2(P of 60 kg/hm2,K of 140 kg/hm2,and paclobutrazol of 250 mg/L) got better effect than the other treatment combinations,the density and plant height of F.arundinacea was relatively higher,and the total score of landscape quality was the best.[Conclusion] The application amount of P and K and paclobutrazol concn.had important influence on the density and plant height of F.arundinacea,and the good collocation of fertilizer and chemical control could supply foundation for the smooth over-summer of F.arundinacea.更多还原