Wednesday, April 25, 2012
ISA HK/China --- China Tree News (Topping) 树木的 "剃头" 现象
国内朋友请查閱 "百度博客 --- 国际树木学会" (http://hi.baidu.com/%B9%FA%BC%CA%CAF7%C4%BE%D1%A7%BB%E1/blog ) 以取得其他文章。本分会的发表文章都已放弃版权, 任何人都可以自由转载作为教育目的, 但不能作为商业目的盈利。 任何人仕都可以申请免費加入本分会, 本分会员名单从不公开, 有意者请将真实姓名、年龄、单位、职衔、最高学历、电邮和手机号传真到 +852-2679-5338 便可. 如有查询, 请电邮至 email@example.com 。本分会的一切发表内容, 谨供参考。
"修剪" 是树艺学的必修科目，当中涉及两大部份：树木的生物学和树木的结构学。树木的生物学并不等同植物学里面的生物学，而是涉及专题科目例如 "创伤板隔化"、"水泵原理"、"抗逆物质" 等等在国内尚未出现的题目。 树木的结构学更是复杂，里面涉及木质构造、反应木的产生和风力分布等等生物物理学的崭新课题，其中大部份在国内尚未出现。
一位 "执业树艺师" 所需要掌握的并不是一大堆的研究报告和天文数字，而是在现场立竿见影的判断一棵大树为何要剪、怎样去剪和该剪多少，他必需运用所学的知识，配上他个人的经验教训，来厘定他的决策，能够在接受挑战的情況下为自己的判断作出辨护。 只要一刀剪错，整棵树的结构和健康都可能出现逆转，而剪下的部份不能用钉子或胶水重新补上。 可谓 "一失剪成千古恨，回头需要几年身"啊。
"树木修剪" 可能是国内极为需要赶快掌握的技术课题，本分会目前能供应的合资格导师也可能只有数位，当中也有不懂说普通话的。 如果寻求外援，除了需要提供翻译以外，差旅教学费用可也不得了，同时他们对我们的品种和水土气候也可能不懂。
国际树木学会 中华地区分会 会长
美洲顾问树艺师学会 顾问树艺师号 RCA#497 (http://isahkchina.blogspot.com/2010/12/isa-hkchina-rac-in-asia.html)
澳洲顾问树艺师学会 顾问树艺师号 ACM 0412011 (www.iaca.org.au)
资深树艺师/注册攀树师号 HK-0174BT (http://isahkchina.blogspot.com/2011/03/isa-hkchina-frist-bcma-in-asia.html)
执业树艺师号 IPA-010908 (http://isahkchina.blogspot.com/2010/04/isa-hkchina-tree-news-1441-report.html)
专业调解及谈判学会 注册调解员号 CM-0044 (http://isahkchina.blogspot.com/2012/01/isa-hkchina-mediation.html)
“不深入诊断和参照研究来批出处方, 是专业失当。 ”
“速成出来的树木评估员, 只会作出胡乱的树木评估。 大自然会决定成败。 ”
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Dear Station Members,
Attached is a set of recent tree news regarding the practice of Topping in China. The commentary by the China expert has hit it right on the spot for the current situation. The underlined parts are the quotings of the Station Manager during his many seminars in China in the past. ISA HK/China is now their main source of reference for modern Arboricultural Practices & Tree Care in Mandarin.
Topping is taught as an acceptable method of tree pruning in most China classes today. It is thought that the regeneration of new shoots is a sign of recovery after stem & branch removal at an imaginary line. The "shoot to root ratio" theory encourages transplanted trees to be topped to balance off the biomass above & below ground, so that it would help for regenerated growth after transpiration. Topping is sometimes done to "re-vigorate" a dying tree, when new shoots would emerge as waterspouts.
As construction work is active everywhere in China & mature trees are favoured for an "instant effect" in landscape, tree topping is defended by China practitioners & designers as the correct means of reducing tree size for transplant. The Station Manager is perhaps the only person ever spoken to explain the ill effects of topping in China in his many seminars there. It is also the courage of the only China newspaper in greenery, the CGN, in pairing with the Station Manager to review the practice. It is our big thanks to CGN indeed.
It will be difficult to turn the table around for topping in China instantly. It may lose jobs for a lot of people, & many academics may need to refresh their knowledge & practices. It will be a big stir in their landscaping community. The change is better from within step by step, rather than in a hurry from outsiders to say we are doing good to their trees. The Station Manager will handle this situation delicately to compare, demonstrate & educate. It will take time.
We hope one day Topping in China will disappear. ISA HK/China will work on this as much as we can as our duty.
President (Station Manager) of ISA HK/China
Registered Consulting Arborist no. RCA#497 (http://isahkchina.blogspot.com/2010/12/isa-hkchina-first-rca-in-asia.html)
Institute of Australian Consulting Arboriculturists Accredited Member no. ACM 0412011 (http://www.iaca.org.au/)
ISA Board Certified Master Arborist / Certified Tree Worker no. HK-0174BT (http://isahkchina.blogspot.com/2011/03/isa-hkchina-first-bcma-in-asia.html)
Independent Practicing Arborist no. IPA-010908 (http://isahkchina.blogspot.com/2010/04/isa-hkchina-hk-tree-news-14410-report.html)
Society of Certified Mediators and Negotiators Certified Mediator no. CM-0044 (http://isahkchina.blogspot.com/2012/01/isa-hkchina-mediation.html)
"Providing treatment without in-depth diagnosis & research support is professional misconduct. "
"Casual tree assessor delivers wanton tree assessment. Mother Nature makes the rules."