古树名木保护的现状与措施浅探

介绍了古树名木的定义,指出了古树名木存在的社会价值,结合古树名木的生存现状对古树名木进行了分类,并根据古树名木的生存现状详细分析了影响古树名木生存、生长和保护的因素,探讨了保护古树名木的积极意义,并有针对性地提出了对古树名木的研究和保护措施,为各地进行古树名木的保护提供了参考.     

古树名木养护与复壮技术

古树名木是大自然和古人留给当今社会的宝贵财富。本文从古树名木标准、古树名木移植、古树名木养护管理等方面,介绍了古树名木养护与复壮技术,为更好地保护古树名木提供了技术帮助。     

兰州市古树名木保护现状与复壮养护管理初探

介绍了兰州市古树名木的保护现状,从兰州市古树名木的生存环境入手,就内外因两方面分析了古树名木衰老的机理,初步探讨了古树名木复壮技术及养护管理措施,建议今后应加大对古树名木的保护力度。     

北京市古树名木管理信息系统的开发与应用

根据北京市古树名木资源管理的需要,以北京市古树名木管理信息系统的开发和应用为主要内容,完成了以Web为基础的北京市古树名木管理信息系统的构建。该系统通过统计分析和网络地图等关键技术,满足了北京市古树名木管理信息化发展的需要,实现了北京市古树名木的信息化、精细化管理,为更好地保护北京市古树名木资源和传承北京市古树名木历史文化奠定了基础。同时,该平台实现了古树名木相关数据的搜集和挖掘,便于更加科学系统地进行古树名木的相关研究,这对充分发挥北京市古树名木在历史文化名城中的重要作用和促进北京市生态文明建设具有重要的作用和意义。     

金华市婺城区古树名木保存现状及保护对策

阐述了金华市婺城区古树名木的保存现状,分析了婺城区古树名木保护存在的历史价值挖掘不够、文化价值提炼不够和管护措施不完善问题,并提出了加强对古树名木的依法依规保护、完善落实古树名木管护制度、加强对古树名木的文化宣传呵护、加强对保护古树名木的资金支持、加强对古树名木立地环境的保护、加强对古树名木的技术管理养护和加强对古树名木的防护与救护等古树名木保护对策。     

长春地区古树名木现状分析

本文对长春地区古树名木资源进行了调查。结果表明:长春地区共有古树名木10科13属14种1299株,其中树龄在300a以上的国家二级古树3株。长春地区古树名木分布不均,长春市有古树名木13种77株;榆树市仅有古树名木1种4株,德惠市古树名木数量多达1189株。     

淄博市古树名木的资源评价

采用逐株、逐片调查的方法,对淄博市的古树名木资源进行了首次全面系统的调查。在调查的基础上,对古树名木树种、数量、生长状况、分布情况、树龄与保护级别等进行了分析研究,建立了古树名木档案,并提出了保护管理措施。结果表明,现存古树名木497株,古树名木群4片,隶属24科、36属、43种,其中一级古树名木227株,二级古树名木270株。     

古树名木的法学问题初探

分析古树名木保护的现状及存在的主要问题:社会重视程度不够、法制不健全、大多数地方未进行古树名木林权登记,造成其所有者的权利没有得到法律确认,影响对古树名木的保护。提出通过制定《古树名木保护条例》、明晰古树名木产权、建立古树名木生态补偿金制度、建立古树名木保护基金,实现对古树名木规范化管理。     

浅谈古树名木生长不良的原因和保护措施

通过对古树名木保护现状及影响古树名木生长的主要因素的分析,提出了保障古树名木正常生长的措施,旨在使古树名木得以科学有效的保护。     

凤翔县古树名木保护存在的问题及对策

分析了古树名木的定义,在现有凤翔县古树名木资源及其保护资料和工作的基础上,针对性地提出了对古树名木的保护措施,为凤翔县古树名木的保护提供参考。     

江西乐安县牛田古樟群资源保护研究

对乐安县牛田古樟群资源调查结果表明,古樟群共有古树4 127株,其中古樟2 907株,其他树种古树1 220株;对照国家古树名木分级标准,结合查数古树年龄和各自生长环境,其中Ⅰ级古树346株,占8.4%,Ⅱ级古树2 330株,占56.5%,Ⅲ级古树1 451株,占35.1%。在对乐安县牛田古樟群古树资源、动植物资源、景...     

谷城县古树资源状况与分布特征研究

系统分析湖北省谷城县古树树种组成、分布特征以及影响古树生长的环境因子,并应用访谈法、文献追踪法、实地勘测法和类比推断法对谷城县古树进行调查,对古树的物种组成、分布以及生长状况,以及基于DEM坐标网格法对古树空间分布进行分析。结果表明,全县调查到存活古树共1 275株,隶属于26科41属51种。其中一级、二级和三级古树分别为99株、102株和1 074株;正常生长古树1 247株,衰弱古树26株,濒危古树2株。基于DEM经纬度（0.05°）和投影（5 km×5 km）网格数据分析,古树均呈聚集分布;古树在中、低海拔分布集中;海拔与古树生长势间呈显著正相关;环境因子和植物病虫害是影响谷城县古树生长的关键因子。谷城县古树空间和海拔高聚集度区域的人类活动最为频繁,建议地方林业部门根据现有古树资源分布特点及生物危害现状,科学制定古树保护规划和管护措施。     

Perpetuating old ponderosa pine

We review current knowledge about the use of management treatments to reduce human-induced threats to old ponderosa pine (Pinus ponderosa) trees. We address the following questions: Are fire-induced damage and mortality greater in old than younger trees? Can management treatments ameliorate the detrimental effects of fire, competition-induced stress, and drought on old trees? Can management increase resistance of old trees to bark beetles? We offer the following recommendations for the use of thinning and burning treatments in old-growth ponderosa pine forests. Treatments should be focused on high-value stands where fire exclusion has increased fuels and competition and where detrimental effects of disturbance during harvesting can be minimized. Fuels should be reduced in the vicinity of old trees prior to prescribed burns to reduce fire intensity, as old trees are often more prone to dying after burning than younger trees. Raking the forest floor beneath old trees prior to burning may not only reduce damage from smoldering combustion under certain conditions but also increase fine-root mortality. Thinning of neighboring trees often increases water and carbon uptake of old trees within 1 year of treatment, and increases radial growth within several years to two decades after treatment. However, stimulation of growth of old trees by thinning can be negated by severe drought. Evidence from young trees suggests that management treatments that cause large increases in carbon allocation to radial xylem growth also increase carbon allocation to constitutive resin defenses against bark beetle attacks, but evidence for old trees is scarce. Prescribed, low-intensity burning may attract bark beetles and increase mortality of old trees from beetle attacks despite a stimulation of bole resin production.     

为古树名木建档保护绿色文物

古树名木的保护是林业部门的一项重要职责,但长期以来,古树名木档案十分缺乏,这对保护相当不利。本文以广东省为例,着重阐述了古树名木建档工作的重要意义,并提出为古树名木建档的具体做法．使古树名木档案能真正有效地被利用,为今后开展古树名木保护工作打好基础。     

河南省古树名木的保护意义与保护对策

阐述了保护古树名木的重要意义,通过对河南省古树名木的现状分析,提出了今后在保护古树名木方面应采取的措施。     

Evidence that hydraulic conductance limits photosynthesis in old Pinus ponderosa trees

We tested the hypotheses that hydraulic conductance is lower in old (about 250 years old and 30 m tall) compared to young (about 40 years old and 10 m tall) Pinus ponderosa Dougl. ex Laws. trees and that lower hydraulic conductance of old trees limits their photosynthesis. Hydraulic conductance at the end of summer 1995, calculated from leaf water potential and leaf gas exchange measurements on one-year-old needles, was 44% lower in old trees compared to young trees growing in a mixed age-class stand on the east slope of the Oregon Cascades. Whole-tree sapflow per unit leaf area averaged 53% lower in old trees compared to young trees and mean hydraulic conductance calculated from sapflow and water potential data was 63% lower in old trees than in young trees. For the entire summer, stomatal conductance (g(s)) and assimilation (A) declined more steeply with air saturation deficit (D) in old trees than in young trees. For both old and young trees, mean g(s) and A were approximately 32 and 21% lower, respectively, at typical midday D values (2.5-3.0 kPa). We hypothesized that if hydraulic conductance limits g(s) and A, then increasing or decreasing the leaf specific conductance of a branch will result in proportional changes in the responses of g(s) and A with D. Removal of 50% of the foliage from a set of experimental branches on old trees caused g(s) and A to decline less steeply with D in early summer, but values were not significantly different from control values in late summer. Cutting transverse notches in branches on young trees had no effect on the responses of g(s) and A with D. Leaf nitrogen content and photosynthetic capacity were similar suggesting that differences in g(s) and A between old and young trees were not caused by differences in photosynthetic capacity.     

长江中下游地区古树名木现状及保护——以南京市为例

结合南京市古树名木的生长情况，简要介绍了南京市古树名木的现状及存在的问题。指出了古树名木的保护工作是全社会长期的重要工作．提出了应从加强规划管理、建立多层次保护体系和动态监测体系、加强生态保护及宣传教育和宣传与立法等3个方面进行保护。     

杨稻复合系统的胁地因子分析

通过对江苏省泗洪县城头林场2 a、3 a和4 a生杨树与水稻复合经营模式下的小气候因子以及水稻产量的测定分析知,水稻产量随着林龄、冠幅、树高增加而减少,随着日照时数、光合速率的增加而增加.林木树高是影响林带内水稻产量的最主要影响因子.     

武汉大学古树名木的保护及利用

为更好地保护和利用武汉大学的古树名木，在武汉大学古树名木调查的基础上，对武汉大学古树名木现状进行分析。武汉大学古树名木26株，分属11科12属12种。在分析古树名木现状的基础上，提出了保护措施及开发利用建议。