三明市珍稀野生植物资源调查

在结合参考1990年以来三明全市名木古树调查、各自然保护区植被调查的基础上,对1999年至2001年全市各县区珍稀野生植物资源调查资料进行市级汇总,得出52个目的物种资源调查结果,并通过分析评价其资源现状,提出结论与建议。     

浙江省国家重点保护野生植物就地保护的研究

对浙江省国家重点保护野生植物就地保护现状及评价进行了研究。目前浙江省已有8个省级以上野生植物和森林生态系统类型自然保护区(点),就地保护国家重点保护植物达38种,占浙江省国家重点保护野生植物总种数(50种)的76%;初步提出了合理调整和布局自然保护区,大力发展自然保护小区、自然保护点和禁伐区,就地保护和其它手段相结合等保护措施。     

毛白杨无性系遗传稳定性和生长适应性分析及综合评价

本文分析了毛白杨Ｄ测定林三个试验点的４年生林木。通过对１３个无性系的方差、Ｇ×Ｅ互作分析表明，各试验点无性系间存在着极显著差异，各地点间以及无性系与地点交互作用差异也极显著；通过对无性系的稳定性和生长适应性及综合评定，选出４个生产力高的优良无性系可在兰州、武威、白银及相似气候区推广；从分析中看出，这些无性系的生长量值与稳定性和适应性关系是多变的，而且是互相独立的。     

林地资产评估中立地质量调整系数确定方法研究

在林地资产评估中,立地质量调整系数是一个重要的参数。文章以桉树适生区为例,通过建立林分平均树高与环境因子的逐步回归模型以及标准蓄积与林分平均树高模型,获取待评估林地的预估蓄积,并以预估蓄积与参照评估林地蓄积之比作为立地质量调整系数。     

云南省松墨天牛危险性分析评估

松墨天牛是松林常见的重要蛀干害虫，也是松材线虫病最主要的媒介昆虫。为加强对云南省松墨天牛的管理，有效控制其危害和在云南省进一步扩散蔓延，采用有害生物危险性分析(Pest Risk Analysis)方法，对松墨天牛在云南省的危险性进行了定性与定量相结合的分析，认为松墨天牛在云南省属于中度危险性的森林有害生物。     

A review of measurement options for multipurpose trees

There is an urgent need to standardize the methods used to assess the growth of multipurpose trees. Most of the standard methods so far described have been developed specifically for use in multilocational trial networks. This paper was prepared for the F/FRED/ICRAF Workshop on MPTS Assessment Methods, held in Thailand in May 1991 to develop internationally-recognised standards for assessment methodology. It critically reviews the methods prescribed by different networks for height and diameter measurement, and for biomass estimation, giving researchers a range of methodological options to consider and re-emphasizing the need, all too often neglected, to define assessment methods clearly and unambiguously.     

Evaluation of the level of threat and protective classification of the vegetation of Makehe Forest in Sanjiangyuan Nature Reserve, west China

After investigating and studying the vegetation, we have established that Makehe Forest, in Sanjiangyuan Nature Reserve, Qinghai Province, is host to a total of 364 different species, representing 173 “genera” in 55 different vegetative families. We propose five quantifiable indices for evaluating the level of threat to these plants: 1) the distribution frequency of the “line transect”; 2) the distribution frequency of sample plots; 3) the distribution density inside sample plots; 4) the existing abundance in the forest region; and 5) plant fidelity. The results show that there are two endangered species, six vulnerable species, 12 nearly threatened species and 344 safe species. The study tried to evaluate the urgency for conserving these plants, according to coefficients of closeness to disappearance, of genetic loss and of usefulness. Results also showed that the number of species of primary concern is two; of secondary concern, nine; of the third level, 23; and of least concern, 330 species. __________ Translated from Journal of Beijing Forestry University, 2006, 28(3): 20–25 [译自: 北京林业大学学报]     

云南省黄胸木蠹蛾的危险性评估

黄胸木蠹蛾是多种阔叶树种的重要蛀干害虫。为正确认识云南省黄胸木蠹蛾对林木所造成危害的危险性,加强管理,有效地控制该虫的危害和防止其进一步扩散蔓延,采用有害生物危险性分析(Pest R isk Analysis)的方法,对黄胸木蠹蛾在云南省的危险性进行了系统的定性与定量分析。通过综合评估,认为黄胸木蠹蛾在云南省属于中度危险性的森林有害生物。     

生态状况内在判断指标体系研究

生态状况内在判断指标是反映生态状况自身变化情况的指标.生态状况处于何种阶段的判断指标,需要从层次性、系统性、现实性、重要性4个方面来考虑.综合考虑包括森林生态状况、土地荒漠化和沙化状况、水土流失状况、生物多样性状况、湿地生态状况、草原生态状况、农田生态状况、城市生态状况等8项指标,8项指标又可以细化为各自的分项指标.通过应用生态综合指数法对生态状况进行分析和综合评估,得出我国生态状况处于治理与破坏相持阶段这一重要结论.     

马蹄金叶斑病发生与室内药剂毒力测定

通过对马蹄金叶斑病病原菌的分离、培养等研究,按照柯赫氏法则确定此病由胶孢炭疽菌和交链孢引起的.室内药剂毒力测定实验表明,保鲜克和百菌清对炭疽菌和交链孢菌丝的扩展蔓延作用较好,代森锌和退菌特对炭疽菌和交链孢的孢子萌发有较好的抑制作用.