网师园古树树体现状和症状及保护技术措施研究

Current Situation,Symptoms and Protective Techniques of Ancient Trees in the Master-of-Nets Garden

调研了网师园现存古树的生长现状与病状,得知网师园现有古树6株,分别属5科5属,树龄为120～920年。网师园古树总体得到了一定的保护,6株古树中树势生长正常,只需进行常规管理的古树有3株,分别为白皮松、罗汉松、紫藤(殿春簃南庭院);需要重点保护的古树有3株,分别为木瓜、圆柏、紫藤,其中树干需要进行防腐、填充保护措施的古树有2株,需进行树势复壮综合技术措施的古树有1株。基于需重点保护的3株古树的病症,笔者提出木瓜的保护措施为:①清理、消毒洞穴,涂抹防腐蚀保护剂,②填补洞穴,③封实洞口;紫藤的保护措施为:①清理腐烂木质部,②对树干进行防腐消毒处理,③涂抹防腐保护剂;圆柏的保护措施为:①清除附属攀缘植物,②清理腐烂木质,③填补洞穴,④改良根际环境及树体复壮。

Growth conditions and symptoms of ancient trees in the Master-of-Nets Garden were investigated,it was found that there were 6 ancient trees about 120-920 years old in this garden,belonging to 5 genera and 5 families.Generally speaking,ancient trees in this garden grow well due to the proper protection,and 3 of them need only regular management,specifically,Pinus bungeana Zucc.,Podocarpus macrophyllus（Thunb.） D.Don,Wisteria sinensis Sweet in south yard of Dianchun Yi（the Peony Study）,while another three need key protection,specifically,Chaenomeles sinensis Koehne,Sabina chinensis（Linn.） Ant.and W.sinensis Sweet,2 of which need corrosion prevention and filling protection,and another 1 needs comprehensive techniques for the rejuvenation of tree vigor.In view of symptoms of these 3 trees requiring key protection,corresponding techniques were proposed：3 steps for protecting C.sinensis Koehne（A.clearing and sterilizing tree holes,painting anti-corrosion protective agent;B.filling holes;C.sealing holes） ;3 steps for protecting W.sinensis Sweet（A.clearing up rotten xylem;B.anti-corrosion and sterilization processing for trunk;C.painting anti-corrosion agent） ;4 steps for S.chinensis（Linn.） Ant.（A.clearing climbing plants around it;B.clearing rotten xylem;C.filling holes;D.improving rhizosphere and rejuvenation of the tree）.