中国木材市场供给结构分析

文内首先对我国木材市场的变化进行了简单回顾，并从计划内产量、计划外产量、非单板型人造板产量以及木材净进口量四个方面，对我国木材市场供给结构进行了分析；最后，针对我国木材市场供给结构的现状，对其进行了发展趋势分析。     

日本落叶松中龄林施肥效应研究

根据在鄂西大老岭林场进行的日本落叶松中龄林4种施肥量、3种N与P配比、2种施肥次数的3a试验效应研究,结果表明:不同施肥量、不同N、P比、不同施肥次数对日本落叶松中龄林生长影响不显著;但14a生B1材积生长比其它平均材积提高28.4%。施肥组合8(A1B1C1)各年生长量均高于其它组合的生长量,其材积比其它平均材积提高32.8%。     

明溪县杉木马尾松商品材立木材积表编制的研究

应用树干分段的二元形数函数的削度方程、商品材材积方程和树干总材积方程的一致性方程系统编制明溪县杉木、马尾松的商品材立木材积表。既能充分利用公开发表的有效的测树信息和数表 ,又能结合区域的资源调查信息估测一致性系统中的参数 ,且编表的误差分布均匀 ,绝对误差和相对误差小     

Marketing constraints for Eucalyptus from farm lands in India

During the early eighties farmers in north-west India planted Eucalyptus on a massive scale for sale as poles and pulpwood. However, after 1986 farmers in this region have almost stopped growing Eucalyptus, as their experience with its marketing was not a happy one. The pole market got saturated, paper mills did not pay a remunerative price, and fuelwood prices were low and uneconomical. More important, because of legal restrictions on the transport and sale of wood, and other institutional factors, the gap in the farmgate price and the consumer price remained very wide. Wood markets have, on the whole, exploited the farmers, rather than helped them. Due to this, the short period of flirtation with tree crops seems to be over for at least resident farmers in those very areas in north-west India where they had so enthusiastically planted Eucalyptus in the early 1980s.Abbreviations BDO Block Development Officer - Headloaders poor people who collect firewood on their heads from forest lands for consumption and sale - m ha million hectares - Rs Indian Rupee 16 Rs = 1 US Dollar in 1989 - panchayat elected village organisation - pradhan village chief On study leave from the Government of India to the Oxford Forestry Institute, South Parks Road, Oxford, OX1 3RB, U.K. Present address: 17 Ponnappa Road, Allahabad 211001, India     

森林资源连续清查进界木与漏测木确定标准的研究

对森林资源连续清查中进界木和漏测木传统确定方法进行分析，指出其存在的随意性和缺乏科学性、明确性；提出应用数理统计方法，通过对已往取得数据的分析，制定出科学、合理、明确的标准。并以云南省2002年森林资源连续清查中楚雄州云南松检尺数据对这一方法进行了具体分析。     

Log Characteristics and Sawn Timber Recovery of Home-Garden Teak from Wet and Dry Localities of Kerala, India

There is a widely held view among smallholders that teak timber produced from small-scale agroforestry systems, especially home-garden forestry, fetches a lower price than that from conventional plantation forestry. To examine the veracity of this view, the wood quality attributes of teak from two home gardens in the district of Ernakulam (wet site) and Palakkad (dry site) in India were compared to those of forest plantation in Nilambur. The logs were graded using standard timber trade practices into high, medium and low quality as determined by the potential sawn timber grade-yield recovery pattern. Of 96 home garden teak logs (aged 35 years) from wet and dry sites, 59% belonged to timber Grade II–IV and the rest were classified as poles. Grade I logs (export quality) with a girth above 150 cm were not available from either of the homesteads. Faster-grown teak in the wet site produced large diameter logs (dbh 1.37 m) with average diameter of 39.6 cm, which is comparable to that of best site quality in India. In contrast, the average dbh for teak grown in the dry site was 24 cm as compared to the average dbh of 31 cm recorded from the same aged forest plantation in Nilambur. It was found that only 10% of logs belonged to Grade II timber and the rest fell under grades III and IV with more frequent visual defects. The sawn timber recovery percentage was lower for the dry site (66.8%), whereas there was no significant difference in grade from the wet and forest plantation sites, with recovery rates of 76.5% and 78.8%, respectively. The general notion that home garden teak has a large proportion of sapwood seems to be baseless, no significant difference being found between the heartwood-sapwood ratio of home-garden and forest plantation teak. Lack of appropriate silvicultural practices in home-garden forestry caused the production of more defective logs, adversely affecting the market price of timber.

Tropical Timber Trade Flows in P.R. China

The historical transition of timber distribution pattern in China was presented firstly with main parts of timber flows in China, which included timber markets, timber transport system and regulations of timber transport. Based on the overview on tropical timber flows in China, the trade flows of tropical timber from production and imports of tropical timber to export of tropical timber products were analyzed by vivid illustrations. At the same time, problems in timber trade flows in China were analysed in the end.     

European forest accounting: general concepts and Austrian experiences

Within the European Union there exist three different frameworks for forest accounting at the national level. For purposes of the national accounts, the regulations of the European System of Integrated Economic Accounts (ESA) have to be observed. They require a distinction between forestry and logging and provide specific guidelines for the valuation of standing timber. In recognition of the special character of forests and forestry production, two satellite accounts are devoted to forestry: the Economic Accounts for Forestry (EAF) and the European Framework for Integrated Environmental and Economic Accounting for Forests (IEEAF). Although they were designed as complementary to the national accounts and refer to the same basic methodologies, the guidelines for forest accounting provided by the three manuals are not fully compatible. Just recently, a further integration and harmonization of the concepts for forest accounting has been proposed. Austria has implemented the valuation of the increment as an output of forestry as requested by ESA and produces the EAF tables on a regular basis. The possibilities for extending forest accounting to natural resource accounts for standing timber and the IEEAF have been investigated in terms of pilot studies. The Austrian experiences and results exemplify the problems and possible solutions associated with the adoption of the different European schemes. Data deficits and valuation issues restrict the significance of respective results to some degree, especially as regards forestry-specific extensions of the accounting schemes.     

发展商品林首选红心杉

陈山红心杉木是江西具有地方特色的杉木优良种源，随着国家林业六大重点工程建设，对发展红心杉前景进行了预测，并提出发展红心杉商品林的措施。     

群改杨无性系材性性状遗传分析

对22个群改杨无性系的材性和生长性状进行综合评定，分别采用六项指标（纤维长度、壁腔比、纤维长宽比、密度、树高、胸径）评分法和三项指标（纤维性状、木材密度、材积）评分法，探讨了无性系评定方法。