台杉:日本的“树上长树”技艺,造就笔直木材
Daisugi the Japanese Technique of Trees Out of Trees, Making Exact Straight Wood (2020)

原始链接: https://www.openculture.com/2020/10/daisugi.html

到了 15 世纪,日本面临着严重的木材和土地短缺,难以满足日益增长的建筑需求。为了解决这一问题,林业工作者发明了一种名为“台杉”(daisugi)的巧妙技术,类似于“巨型盆景”。通过修剪一棵“母树”,林业工作者促使其顶部萌发出多根笔直的垂直枝条。 这种方法不仅防止了森林砍伐,还生产出了“樽木”(taruki)——一种极其笔直、纤细且耐用的木材。这种木材因深受京都精英阶层的喜爱,被广泛用于精致的“数寄屋造”(sukiya-zukuri)建筑和茶室中。除了美学价值外,台杉木材的密度和柔韧性也远超普通杉木,使其具有极佳的抗台风能力,并成为结构性椽子的上佳之选。 六个世纪过去了,台杉依然是可持续林业的典范。它将古老的工艺与实用的创新融为一体,在人类建筑需求与环境保护之间取得了平衡。

这篇 Hacker News 的讨论批评了一篇关于“台杉”(Daisugi)的文章。台杉是一种日本林业技术,旨在生产笔直且优质的木材。 评论者对该文章缺乏深度表示不满,指出这似乎是为了赚取广告收入而从社交媒体上挖掘内容,属于低质量的“诱饵文章”。用户间的技术讨论澄清了台杉实际上是一种伐木修剪或萌芽更新技术,即通过修剪树木来促进特定生长模式的古老方法。 通过打造稳固的基座,该技术迫使树木长出垂直的“徒长枝”。由于这些枝条比普通枝干生长得更慢,产出的杉木密度更高、强度更大且柔韧性更好。虽然该方法在可持续和高效的空间木材生产方面很有效,但用户也强调了它极其耗费人工。总的来说,该讨论串揭穿了对此技术的“神秘化”包装,将其回归到已知的植物学原理上,并认为所链接的文章质量低劣。
相关文章

原文

Image by Wrath of Gnon

We’ve all admired the ele­gance of Japan’s tra­di­tion­al styles of archi­tec­ture. Their devel­op­ment required the kind of ded­i­cat­ed crafts­man­ship that takes gen­er­a­tions to cul­ti­vate — but also, more prac­ti­cal­ly speak­ing, no small amount of wood. By the 15th cen­tu­ry, Japan already faced a short­age of seedlings, as well as land on which to prop­er­ly cul­ti­vate the trees in the first place. Neces­si­ty being the moth­er of inven­tion, this led to the cre­ation of an inge­nious solu­tion: daisu­gi, the grow­ing of addi­tion­al trees, in effect, out of exist­ing trees — cre­at­ing, in oth­er words, a kind of giant bon­sai.

“Writ­ten as 台杉 and lit­er­al­ly mean­ing plat­form cedar, the tech­nique result­ed in a tree that resem­bled an open palm with mul­ti­ple trees grow­ing out if it, per­fect­ly ver­ti­cal,” writes Spoon and Tam­ago’s John­ny Wald­man. “Done right, the tech­nique can pre­vent defor­esta­tion and result in per­fect­ly round and straight tim­ber known as taru­ki, which are used in the roofs of Japan­ese tea­hous­es.”

These tea­hous­es are still promi­nent in Kyoto, a city still known for its tra­di­tion­al cul­tur­al her­itage, and not coin­ci­den­tal­ly where daisu­gi first devel­oped. “It’s said that it was Kyoto’s pre­em­i­nent tea mas­ter, Sen-no-rikyu, who demand­ed per­fec­tion in the Kitaya­ma cedar dur­ing the 16th cen­tu­ry,” writes My Mod­ern Met’s Jes­si­ca Stew­art.

At the time “a form of very straight and styl­ized sukiya-zukuri archi­tec­ture was high fash­ion, but there sim­ply weren’t near­ly enough raw mate­ri­als to build these homes for every noble or samu­rai who want­ed one,” says a thread by Twit­ter account Wrath of Gnon, which includes these and oth­er pho­tos of daisu­gi in action. “Hence this clever solu­tion of using bon­sai tech­niques on trees.” Aes­thet­ics aside — as far aside as they ever get in Japan, at any rate — “the lum­ber pro­duced in this method is 140% as flex­i­ble as stan­dard cedar and 200% as dense/strong,” mak­ing it “absolute­ly per­fect for rafters and roof tim­ber.” And not only is daisu­gi’s prod­uct straight, slen­der, and typhoon-resis­tant, it’s mar­veled at around the world 600 years lat­er. Of how many forestry tech­niques can we say the same?

via Spoon and Tam­a­go

Relat­ed Con­tent:

The Art & Phi­los­o­phy of Bon­sai

This 392-Year-Old Bon­sai Tree Sur­vived the Hiroshi­ma Atom­ic Blast & Still Flour­ish­es Today: The Pow­er of Resilience

The Philo­soph­i­cal Appre­ci­a­tion of Rocks in Chi­na & Japan: A Short Intro­duc­tion to an Ancient Tra­di­tion

The Secret Lan­guage of Trees: A Charm­ing Ani­mat­ed Les­son Explains How Trees Share Infor­ma­tion with Each Oth­er

The Social Lives of Trees: Sci­ence Reveals How Trees Mys­te­ri­ous­ly Talk to Each Oth­er, Work Togeth­er & Form Nur­tur­ing Fam­i­lies

A Dig­i­tal Ani­ma­tion Com­pares the Size of Trees: From the 3‑Inch Bon­sai, to the 300-Foot Sequoia

Based in Seoul, Col­in Mar­shall writes and broad­casts on cities, lan­guage, and cul­ture. His projects include the Sub­stack newslet­ter Books on Cities, the book The State­less City: a Walk through 21st-Cen­tu­ry Los Ange­les and the video series The City in Cin­e­ma. Fol­low him on Twit­ter at @colinmarshall, on Face­book, or on Insta­gram.


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