113.12.15第四季志工隊增能訓練暨聯繫會議
園區113年最後一次的志工隊增能訓練，請來了樹木專家 ，教導大家樹木 栽種和養護的技巧。園區總佔地46餘公頃，其中保留了約15公頃作為國土保安林地 使用，所以自106年建廠完成後，每年都持續辦理綠美化植樹，迄今已種植了3000多棵的樹木(苗) ，而後續的養護就非常的重要了！今天的課程講師提供多棵稀有珍貴原生種樹苗，手把手教授大家植樹該注意的細節，原來種樹不是挖洞和埋土這麼簡單，還有很多眉角要注意，完全顛覆以往印象。
#持續努力植樹固碳救地球
#積木成林成為斗六市後花園
#志工隊臥虎藏龍各式才藝難不倒
#有愛無礙的志工隊大家庭
#預言明年獨角仙大爆發
#隨處一挖就是肥大的雞母蟲
#湖山自來水環境教育園區志工隊
資料來源:
fb
椴樹修剪前後
昨晚，在美麗的義大利豐塔內利切市政廳內，舉辦了一場有關城市樹木管理和養護正確實踐的宣導與教育活動。活動內容深入探討了錯誤做法在短期、中期和長期內對樹木造成的影響，並透過實例提供具體說明。我們也介紹了專業的樹藝師這一職業，以及他們必須擁有的認證，才能為品質提供全面保障。
活動中特別針對歐洲大道（省道蒙塔納拉）上80棵椴樹的修剪計劃進行了詳細說明。這些椴樹正在接受多年的穩定性評估與修剪管理計劃。
本週展開的第一批修剪作業，旨在解決過去多年多次進行“截頂修剪”所引發的問題。第二張幻燈片左圖中綠色虛線表示第一次截頂修剪的範圍，目的是誘導反覆生長。之後，修剪管理轉變為“柳樹頭”形式（黃色虛線）。在拋棄這種管理形式後，選擇了一兩根粗大的主幹進行再度截頂（橙色虛線），並在約十年前進行了最後一次截頂（紅色虛線）。這些修剪操作造成了嚴重後果，包括：
1. 光合作用與激素活動的下降，導致樹木能量和分支結構受損；
2. 切口部位廣泛的腐爛，並產生無序的再生枝條（見第二張幻燈片右圖）。
這些重複的截頂修剪，使得樹木提前進入老齡階段（依據皮埃爾·雷姆博的第9階段分類），再加上其生長環境（360°被柏油路圍繞），使得樹木的生長能量非常不利。
因此，我們選擇在樹木休眠期進行修剪，希望利用春季萌芽時期的活力，促進健康的再生枝條，並為未來的修剪計劃打下基礎。
此次操作主要包括三個方面：
1. 清理乾枯、衰弱和受損的枝條；
2. 提升樹冠高度，以符合交通規定（距離路面至少4米，行人區域至少2.5米）；
3. 修整樹冠，選擇生長較好的分支，對截頂後的主幹進行減量修剪，並在合適位置進行回縮修剪（第三張幻燈片中紅色和橙色虛線標記的區域）。
整個過程中，操作人員使用高空作業平台，繩索工人進行細節處理，地面有兩名人員協助交通疏導和廢料清理。
修剪後，移除的枝葉量視情況佔樹冠總量的10%-20%。雖然對老年樹木而言這是一個較大的比例，但由於截頂修剪導致的結構損壞和植株環境限制，這些措施無法避免。
最後，我代表我的團隊感謝豐塔內利切市政府，讓理論付諸實踐，為公共資產——這些椴樹——提供正確管理，既滿足了樹木的需求，也兼顧了居民的利益。
Ieri sera nella bellissima cornice del Comune di Fontanelice, si è svolta una serata divulgativa e conoscitiva delle corrette pratiche di gestione e cura degli alberi in ambiente urbano e delle conseguenze che hanno le scorrette pratiche nel breve, medio e lungo periodo sugli alberi entrando nel merito con esempi pratici e tangibili. Ci siamo soffermati anche su quali sono le figure specializzate in tale ruolo, ovvero gli arboricoltori, e le certificazioni che devono essere in possesso per garantire una piena e totale garanzia di qualità.
A tal riguardo ci siamo soffermati per buona parte del tempo a spiegare la ratio degli interventi su ben 80 esemplari di Tigli posti su Corso Europa (aka Strada Provinciale Montanara).
Questi Tigli sono posti all'interno di un programma pluriennale di valutazione di stabilità e interventi cesori.
Il primo intervento che è partito questa settimana ha come compito quello di risolvere le problematiche dettate da un concorso di "più capitozzature" perpetrato negli anni passati come enuncia la seconda slide nella foto a sinistra: la linee tratteggiate verde indica la prima capitozzatura per indurre un processo anticipato reiterativo sui quali viene impostata la gestione a "Testa di Salice" (linea tratteggiata gialla); abbandonata la forma di gestione in forma obbligata vengono selezionati anni addietro uno o due grossi tronchi che a loro volta vengono capitozzati (linea trattegiata arancione) e nuovamente capitozzati (linea tratteggiata rossa) circa una decina di anni fa. Le ultime due capitozzature sono state eseguite su diametri variabili sui 15/20cm inducendo non solo un crollo dell'attività fotosintetica (ergo energia) e ormonale (ergo gerarchizzazione delle ramificazioni), ma anche carie estese sui punti di taglio dove si dipana in maniera anarchizzata e incoerente da un punto di vista meccanico la nuova vegetazione (seconda slide, foto a dx). Queste reiterate capitozzature hanno tra l'altro catapultato le alberature in stadi prossimi alla vecchiaia (stadio 9 Pierre Raimbault) e anche complice il contesto nel quale i Tigli sono a dimora (tornelli su asfalto a 360°) versano in condizioni energetiche non favorevolissime.
Da qui l'intenzione di lavorare queste alberature nel periodo di risposo vegetativo in modo da "sfruttare" il risveglio vegetativo a nostro vantaggio avendo un incipit maggiore a livello di "esplosione vegetativa", garantendo nuova vegetazione arretrata e coordinata per essere luogo di nuovi interventi in divenire coerentemente con il programma pluriennale di ristrutturazione delle alberature in oggetto.
Le operazioni svolte sono state sostanzialmente tre: una rimonda della vegetazione secca, deperita e compromessa, una elevazione di impalcatura coerente con il Codice della Strada (almeno 4 m dal piano stradale e 2,5 m dalla zona pedonale) e una ristrutturazione della chioma, ovvero la selezione dei reiterati traumatici meglio inseriti e disposti sui tronchi capitozzati e sul fusto, applicando sugli stessi una riduzione attraverso la selezione tra tronchi equivalenti (terza slide elisse tratteggiata in rosso) e laddove avevamo branche o tronchi metamorfizzati in branche un taglio di ritorno su epitoni arretrati (terza slide elisse tratteggiata in arancione).
Il tutto viene condotto su PLE, un operatore su fune e due operatori a terra sia per le opere di movieraggio sulla strada e di smaltimento del materiale di risulta.
La vegetazione asportata è all'interno di una forbice a seconda dei casi tra il 10 e il 20%, quantitativi già di per sè alti per alberature che si trovano in uno stadio di vecchiaia, ma che a causa della vegetazione inserita male o palesemente compromessa a causa della capitozzatura e del contesto (l'elevazione di impalcatura aumenta la vegetazione asportata) non vede alternative.
Ringrazio a nome mio e della mia squadra l'amministrazione comunale di Fontanelice per dar modo alle parole di diventare fatti. Che un bene pubblico, ovvero le alberature in oggetto, venga gestito correttamente andando incontro sia alle esigenze dell'albero ma anche a quelle della popolazione.
資料來源 :
FB Tedioli Stefano
伊利的倫敦梧桐保育計劃
確保英國最大倫敦梧桐的未來
這篇文章是短篇系列的第一篇，記錄了一棵歷史遺產樹的管理者如何與英國和歐洲頂尖的樹藝專家合作，學習創新技術以照顧這棵歷史悠久的老樹。接下來的文章將由巴查姆樹木公司的基思·薩克（Keith Sacre）共同撰寫，深入探討保育計劃、進行的工作以及確保樹木長期健康的成果。
本文主角是伊利的大倫敦梧桐，位於舊主教宮殿（Old Bishop’s Palace）的花園內。這裡現在是國王學院伊利高中部中心所在地。這棵樹具有極高的歷史價值，已有超過350年的樹齡，被公認為英國最大且最古老的倫敦梧桐之一。
歷史背景
這棵樹約於1674年種植，據說是查理二世國王贈送給伊利主教彼得·甘寧（Peter Gunning）的禮物，當時此類樹木象徵著地位與影響力。種植時這棵樹可能已有5至10年的樹齡。它是東方梧桐（Platanus orientalis）和美國二球櫟（Platanus × hispanica）的雜交種，這一雜交組合首次於1663年前後記錄，據說是在著名植物學家和皇家園丁Tradescant家族的倫敦蘭貝斯花園中誕生的。這使得伊利的這棵樹被認為是英國最早的倫敦梧桐之一。
在2002年女王金禧慶典期間，這棵樹因其歷史重要性被樹木委員會（Tree Council）列入《50棵英國偉大樹木》的名單，成為書中唯一一棵上榜的倫敦梧桐。
保護與傳承
2013年，巴查姆樹木公司與大衛·約翰遜（David Johnson）合作，從這棵樹上採集枝條進行繁殖。如今，它的後代已種植於邱園皇家植物園、諾福克的桑德靈漢姆莊園、薩福克的丹斯頓廳和帕拉姆廳，以及格洛斯特郡的斯通豪斯（靠近樹藝協會總部）。伊利舊主教宮殿的花園內也種植了一些子樹，可近距離觀賞這棵巨樹的「子孫」。這些樹被命名為「伊利梧桐」，繼承了原始基因。
樹木健康與保育
這棵倫敦梧桐依然健康旺盛，今年顯示出豐富的新季節生長。然而，由於早期安裝的纜索固定已使用多年，樹木管理者與專家們合作，評估未來的最佳管理方式。經過多次會議，他們採用了樹木形態生理學的調查方法，以全面了解樹木需求，制定長期健康維護計劃。
2024年7月，專家團隊進行了全樹形態生理學調查，提出了細緻的保育計劃，包括安裝帶有動態元素的新型纜索固定系統，讓樹木能夠自然運動。此外，還制定了多年的精細修剪計劃，確保樹木的持續生長與健康。
創新監測與研究
劍橋大學工程系為這棵樹安裝了加速度計，實時監測其運動幅度與頻率，分析各種天氣條件下的樹木行為。這一數據將用於對比纜索固定前後的影響，並模擬樹木的結構動力學，為後續研究提供基礎。
國家遺產與社區資源
這棵樹得益於其花園不對公眾日常開放，避免了過多的人為和動物活動干擾。管理者也認識到這棵樹不僅是國家遺產，還是社區的珍貴資產，因此安排特殊活動向公眾開放。例如，歷史悠久的伊利之旅包括舊主教宮殿花園的參觀。2024年8月，一場藝術周末活動吸引了75位藝術家前來創作與樹木相關的藝術作品，活動甚至被BBC廣泛報導。
這棵樹代表著歷史與自然的融合，其壯麗與生命力將持續激勵後人。
Conservation of Ely’s London plane
Securing the future of the biggest London plane in the UK
This is the first in a short series of articles giving an account of how the custodians of a heritage tree came to meet some of the leading arboricultural experts from across the UK and Europe, and learnt the best way to care for a historically important veteran tree using innovative techniques.
Subsequent articles, co-authored with Keith Sacre of Barcham Trees, will delve into the conservation plans, works undertaken and outcomes that will ensure the tree's continued good health long into the future.
The tree in question is the Great London Plane Tree of Ely. It is situated in the gardens of the Old Bishop's Palace, which is the location of King's Ely Sixth Form Centre. The tree is of great historical significance and at well over 350 years old is recognised as the largest single London plane in the UK, and one of the oldest.
It was planted around 1674 and is believed to have been a gift from King Charles II to Peter Gunning, Bishop of Ely, when such a tree was regarded as an important indicator of status and influence. It was likely to have been between 5 and 10 years old when it was planted in the position where it stands today. A hybrid of the oriental plane (Platanus orientalis) and American sycamore (Platanus x hispanica) that was first noted in about 1663, the hybrid cross is thought to have occurred in the Lambeth gardens of the Tradescants, the great 16th- and 17th-century botanists and royal gardeners. Ely's is, therefore, believed to be one of the UK's original London planes.
In recognition of its historical significance, the tree was identified as being one of the top 50 Great British Trees by the Tree Council in Jon Stokes' excellent book, as part of the celebrations for the Queen's Golden Jubilee in 2002. It is the only London plane on the list.
In 2013, working together with David Johnson from Barcham Trees, cuttings were taken and now the tree's offspring are growing in the Royal Botanic Gardens Kew, on the Sandringham Estate in Norfolk, at Denston Hall and Parham Hall in Suffolk, in Stonehouse, Gloucestershire (near the Arboricultural Association's offices) and in the Old Bishop's Palace gardens within sight of its parent. Barcham Trees also has several saplings growing in its new arboretum. The trees are designated as 'Ely Planes', propagating the DNA strain from the original.
The Old Palace dates from the 1480s, and it was home to the Bishop of Ely from 1486 until 1941. The building has seen plenty of history, including being used as a prison for Catholic recusants from 1588 to 1597. The fathers and other relatives of some leading figures of the failed 1605 Gunpowder Plot were even imprisoned here. The Red Cross took over the building in 1941, initially as a hospital for wounded servicemen, then as a school for disabled children. In 1983 the Sue Ryder charity occupied the Old Palace as a care home and remained until 2010. King's Ely then took over the building, leasing it and the grounds from the Church Commissioners and opening it as the school's Sixth Form Centre in 2012 following a very extensive and sympathetic restoration.
The London plane itself has certainly seen a lot of history. Many adults and children have sought respite from the sun in the shade of its crown, enjoyed picnics at the foot of the enormous trunk, and been graced by its majesty. To this day many people experience an emotional response to the tree when in its presence.
On Sunday 25th July 1937 at around 9am, with the sound of 'a report like a cannon', a limb fell from the tree, as reported in the local Ely paper at the time.
Fortunately no one was in the garden. Cable bracing between the main limbs was subsequently installed in the 1940s. Additional bracing was added in the 1980s, and more has since been installed since the school took over custodianship.
As custodians of the tree within an estate that covers around 75 acres which has many veteran trees and Grade I listed buildings, we recognise the responsibilities that come with caring for heritage assets. King's Ely has the largest collection of medieval buildings that have been in continuous use in the UK. The community of trees in the Old Palace gardens includes two veteran oriental planes, a huge old Ginkgo biloba, a couple of very large limes and some old mature chestnuts. It's often said by arborists who visit the gardens that if were not for the London plane, the Ginkgo would get all the attention! Elsewhere we have a weeping beech that is around 200 years old, a beautiful old silver birch and some veteran yews. We have longstanding relationships with arboricultural consultants, some of whom have cared for the trees over very many years, including prior to King's Ely's tenure.
Securing the tree's future
The tree continues to enjoy vigorous good health, with plenty of new-season extension growth on display this year. Knowing how long some of the cable bracing has been in place, together with our consultants we have considered how best to care for the tree into the future. Given its very special status, we sought advice from the Tree Council, the Woodland Trust and Kew. Several meetings later, we met with the Arboricultural Association, who proposed using the morphophysiology approach to surveying the tree.
We realised that we needed to have a whole-tree survey in order for us to fully understand the needs of the tree, and determine what is required to ensure its long-term health and vitality, whilst taking account of the tree's location within a school and a historically important conservation area.
Stefania Gasperini and Giovanni Morelli from AR.ES s.a.s. di Gasperini Stefania & C. and their team conducted a whole-tree morphophysiological survey from 15th to 17th July this year. Simon Richmond and Emma Gilmartin from the Arboricultural Association and Keith Sacre from Barcham Trees were in attendance to witness the survey in action. The attention to detail and level of understanding were impressive, with a narrative from Stefania and Giovanni that both clarified what we were seeing and informed us of the good health of the tree. A future article will go into the technical details, but suffice to say that a clear plan was formed for the care of the tree, including installation of new cable bracing with dynamic elements that will provide the necessary support whilst allowing the tree to move as naturally as possible. This, in combination with a multi-year precision pruning plan, will ensure that the tree continues to flourish well into the future.
Experts from the UK and beyond discussing the future of Ely's London plane, July 2024.
The morphophysiological approach to managing Ely's London plane is presented as the first of a series of case studies that the Arboricultural Association is introducing with important trees in the UK, to start to provide an evidence base of how this approach can be used effectively as part of the arboricultural options available to both consultants and practitioners.
Another innovation as part of the conservation project is real-time monitoring of the tree. The University of Cambridge Department of Engineering has installed accelerometers on the tree that, together with a data acquisition system, allow movement amplitude and frequency data to be captured. This will enable us to see how the tree behaves in all weather conditions throughout the seasons, and will provide a before-and-after comparison to monitor the effect of the new cable bracing once it has been installed. The Cambridge team aim to model the structural dynamics of the tree, allowing further analysis and research. They also carried out laser scan surveys earlier in the year and in the summer, providing a comparison of the tree with and without leaves.
National heritage
One reason the tree and its compatriots are in such good health is that the gardens are not accessible on a daily basis to the public. Whereas some notable trees have suffered as a result of too much human or animal activity, Ely's London plane enjoys privacy and the protection that goes with it.
We recognise that the tree is part of our national heritage and a community amenity, so we are making the tree and the Old Palace gardens more accessible when we can. Clearly we have to ensure safeguarding within the school environment, as well as continuing to protect and care for the tree, so this has to be done in a controlled way. Special events are arranged to provide access to the wider community and visitors. For example, working with the local tourist information centre, tours of historic Ely include a walk through the Old Palace gardens. During August, 75 artists attended an art weekend held in the Old Palace gardens to create artworks of the tree and its surroundings. Given the high level of interest in the tree, the event was reported on BBC Radio and TV, and on the BBC News website.
資料來源:
https://www.trees.org.uk/News-Blog/Latest-News/Conservation-of-Ely%E2%80%99s-London-plane?fbclid=IwY2xjawGwo5ZleHRuA2FlbQIxMAABHRjIXc5B_PsSZRG9u9Zws_56RHn8TvKfD74d2UTAnJvuC4j7S4Rxn7WZ7Q_aem_h6BNSjZSv9mGc79HND2IJA