摘要
2010年3-4月,对北京城郊雪松冻害情况进行调查分析,6月份对其恢复情况进行了跟踪观测。结果表明,骤然降温和极端低温是雪松受冻害的主要原因;大多数雪松均有不同程度的冻害发生,城八区和郊区县冻害稍轻,五环外苗圃受冻害较严重;叶片受冻Ⅰ-Ⅲ级,枝条受冻Ⅰ-Ⅱ级雪松开春后基本能恢复树势,景观效果不受影响;今后应做好边缘树种冬季防寒工作,减少冻害发生。
The frozen injury of Cedrus deodara in Beijing suburbs was investigated from March to April in 2010 and the situation of restoration was observed in June.The results showed that,the primary reason on frozen injury of Cedrus deodara were the sudden cooling and the extreme low temperature.Most Cedrus deodara suffered varying degrees of frozen injury,the eight districts and suburb＇s were less affected and nurseries at the areas out of the fifth-ring＇s were more affected.Frozen Cedrus deodara whose leaves suffered Ⅰ-Ⅲ level and branches suffered Ⅰ-Ⅱ level could resume and the landscape was not affected.This article advocated that landscape workers ought to guard against the frozen injury of edge species in the future.
出处
《北京农学院学报》
2011年第1期54-57,共4页
Journal of Beijing University of Agriculture
基金
北京市科技计划项目(H010610240113)
关键词
雪松
低温
冻害
Cedrus deodara
low temperature
frozen injury
