深秋施肥对高羊茅草坪越冬的影响

在盆钵砂培试验条件下,研究不同氮素浓度(0,0.5,5.0,10.0,15.0,20.0 mmol/L)对高羊茅草坪草越冬的影响;在田间条件下研究了不同施氮量(0,2.5,5.0 g/m2)下高羊茅的越冬期表现.结果表明,无论是田间还是盆钵条件下,无氮处理都表现为生长停滞、叶色差、草坪质量较差,但抗寒性较好.盆钵试验中过高的氮素水平(20 mmol/L)造成草坪草徒长,抗寒性降低,从而降低草坪质量.而在田间条件下,深秋施氮不会导致草坪草冻害,而且草坪质量好,春季返青早.但冬季施肥对草坪草冬季表现作用不大,还会导致高羊茅春季生长过旺,加大修剪工作量.

Effect of late fall nitrogen fertilization application on Festuca arundinacea turf

This study evaluated the effect of differing nitrogen levels(0,0.5,5,10,15,20 mmol/L) on the winter performance of F.arundinacea cv.Pixie,both in a pot and field experiment.In the plot trials without N applied,F.arundinacea grew slowly and had both poor leaf color and turf quality,however it was shown to have good cold tolerance.At a high N level(20 mmol/L) the growth increased,however was shown to have a decreased cold tolerance,and was shown to degrade turf quality in the winter.In the field plots with N,F.arundinacea was of better quality,with early green-up,and was not adversely affected during the winter period.However,fertilization during winter was not beneficial for the winter performance of F.arundinacea as in contrast,winter fertilization may cause quicker growth in the spring,leading to more clippings.