昆明市草坪枯草层改良措施的研究

草坪枯草层的厚度和形成速度直接影响草坪的质量及其寿命。研究表明,床土粘重、通透性差、土壤酸性化和草坪管理技术不规范是加速草坪枯草层累积的主要原因。生物控制是防止草坪枯草层累积的首选技术,即利用各种栽培和管理技术,可以促进枯草层的分解,避免草坪草枝条的过量生长和积累;表施土壤,增施生石灰,少量频繁施入氮肥,减缓草坪草的生长速率是主要的生物控制技术;在草坪枯草层累积过厚或草坪根系絮结过重的情况下,采用机械改良效果较好;在昆明地区,采用打孔机100孔/m2和120孔/m2两种处理,配合表施土壤,改良枯草层效果最佳。

Preliminary Study on Improvement Measure of Turf Thatch in Kunming

Thatchform reasons and its control on turf werestudied in the paper. The results indicated that the major factors for excessive accumulationof thatch areas follow: more soil clay, poor aeration and poor water movement, soil acidification and poor turf managements. Toc ontrolling the thatch, biological control is preferred since it is the utilization of cultural practices that enhance the thatch decomposition rate and avoid excessive stimulation of turf grass shoot growth. Biological control involved the topdressing, using lime, avoiding excessivenitrogen nutrition or irrigation practices, and minimize growth rate of turf grass. Mechanicalcontrol ismore effective for excessive accumulation of thatchand compaction of the soil, it involved in vertical mowing and coring.The resultsshowed that coring leaving 100 holes/m~(2)and 120 holes/m~(2)in the sod associated with topdressing are more effective to control the thatchas well.