吉林省东部高寒山区造林苗铲改进简报

本文介绍了改进后与改进前的造林苗铲的数据、优缺点和实际应用效果检验,结果表明:改进后的造林苗铲降低了劳动强度,提高了工作效率,保证了栽植质量。     

短周期工业原料林杨树品种的引种及选育

<正>湖北省自1973年引进美洲黑杨南方型Ⅰ-63、Ⅰ-69和欧美杨Ⅰ-72栽培,由于其速生丰产等特点, 迅速成为我省江汉平原地区速生丰产林基地造林和世行贷款工程造林的主要造林树种,掀起了我省发展杨树产业的第一次高潮。     

杨树工业原料林的育苗技术

近年来,因杨树生长迅速,材质优良,易于繁殖,成为短周期工业原料林发展的一个主要树种,越来越受到人们的重视.江西等省的杨树工业原料林也得到迅速发展[1],杨树四旁造林面积扩大,给杨树工业原料林大面积造林提供了苗木保证.我们对杨树短周期工业原料林育苗技术进行了研究,现结合杨树多年来的育苗实践,将杨树壮苗培育技术总结如下.     

江西短周期工业原料林造林区划与树种筛选

从植物地理学的视角针对江西各地不同区位、不同水热和地理条件分别提出短周期工业原料林的发展前景和布局.在科学区划的基础上,本着适地适树的原则,着重总结经多年试验筛选出的适宜作短周期工业原料林的造林树种10余个,就选用条件、生物学特性、经济价值及其栽培技术分别进行论述.     

吉林东部山区林冠下红松造林技术

红松是吉林东部山区的主要造林树种。文章从地类选择、整地、苗木选择、造林、抚育、病虫害防治等方面介绍了吉林东部山区林冠下红松造林技术。     

吉林省西部地区杨树造林技术

杨树是吉林省西部地区的主要造林树种,在西部生态建设中占有重要地位。本文从造林地选择、苗木选择、造林技术、抚育管理等方面介绍了杨树在吉林省西部地区的造林技术。     

杨树工业原料林早期选择的研究

杨树工业原料林早期选择的研究王树为，高士新，郭力宏，王江，栾士波（黑龙江省林科所）（黑龙江省森林植物园）（黑龙江省林科所）多年未．树木早期选样的研究一直受到人们高度的重视，并就此做了大量工作。然而从过去工作的侧重点来看，皆系为遗传育种服务，并作为对优...     

杨树短周期工业原料林培育的几个主要问题的探讨

就几年来在杨树工业原料林栽培过程中的苗木培育、造林、培育目标及萌芽更新等几个主要技术中存在的问题进行了分析评述，并提出了解决问题的办法。对杨树短周期工业原料林在江西的发展可作借鉴。     

山东省发展杨树工业原料林的几个技术问题

针对山东省杨树工业原料林培育现状，对品种选择、密度与轮伐期、苗木与栽植技术、地力维护与可持续经营、病虫害防治等技术问题进行了分析阐述，提出可行性建议，对山东省发展杨树工业原料林提供参考。     

对吉林省东部山区林业产业发展的探讨

通过对吉林省东部山区的调查，提出了加快林业产业发展的战略意义和指导思想，同时，指出了应以大力营造速生丰产林，干果林，开发生态经济沟，发展加工业及信息服务等为发展重点目标。     

辽东山区次生林植物物种多样性研究

通过对辽东山区18块样地的调查及数据处理,计算出各样地乔木、灌木、草本的Margalef丰富度指数、Gini均匀度指数和Simpson多样性指数。从调查及分析结果来看,在本研究区域内,海拔高度对调查区域内的物种多样性影响不大,郁闭度、坡向、坡度对物种多样性有一定影响。     

吉林省通化地区"平欧"大榛子栽培技术

"平欧"杂种大榛子是我国原产的平榛与引进我国的欧洲榛种间远源杂交选育出的优良品种.本文简要介绍了"平欧"大榛子的特性,并从栽培技术、管理技术、采收和贮藏等方面介绍了"平欧"大榛子在吉林省通化地区的栽培技术.     

洪泽湖大堤杨树丰产林营造技术

洪泽湖大堤杨树丰产林营造技术措施是：采用新品种、大苗栽植、适当稀植、抚育管理、病虫害防治等。     

Spatial and temporal distribution of forest fire frequency and forest area burnt in Jilin Province,Northeast China

Forest fires caused by natural forces or human activities are one of the major natural risks in Northeast China. The incidence and spatial distribution of these fires vary over time and across the forested areas in Jilin Province, Northeast China. In this study, the incidence and distribution of 6519 forest fires from 1969 to 2013 in the province were investigated. The results indicated that the spatiotemporal distribution of the burnt forest area and the fire frequency varied significantly by month, year, and region. Fire occurrence displayed notable temporal patterns in the years after forest fire prevention measures were strictly implemented by the provincial government. Generally, forest fires in Jilin occurred in months when stubble and straw were burned and human activities were intense during traditional Chinese festivals. Baishan city, Jilin city, and Yanbian were defined as fire-prone regions for their high fire frequency. Yanbian had the highest frequency, and the fires tended to be large with the highest burned area per fire. Yanbian should thus be listed as the key target area by the fire management agency in Jilin Province for better fire prevention.     

Effects of community succession dynamics on forest biodiversity in eastern mountainous area of Heilongjiang Province

Plant, insect and forest structures of 25 forest communities were investigated in Mao'ershan Experimental Forest Farm and Liangshui Experimental Forest Farm during 1994–1995. The paper used continuum index (C _i) as a parameter, to quantitatively describe forest community succession stage. Relationships between the biodiversity and continuum index of forest community were studied. The annual species and family diversities in forest plant community showed nonlinear correlation with continuum index, and the largest diversities were during the middle stage of succession. The diversities of total insect community and herbivorous insect group were negatively related withC _i, that of spide group and parasitic insect group was positively related. The pattern diversity and coverage weight diversity index foliage height increased with continuum index. Foundation item: This project was supported by Chinese Academy of Science. Biography: MENG Qing-fan (1965-), male, Ph. doctor, associate professor of Beihua University, Jilin 132013, P.R. China. Responsible editor: Zhu Hong     

芳樟工业原料林营建中的若干问题

芳樟经济开发价值潜力很大，已日渐受到人们的重视，但芳樟优良无性系工业原料林发展尚处于起步阶段。笔者针对目前芳樟工业原料林开发中的良种选择、工厂化苗育、造林地选择、矮林作业等方面的有关技术和存在的问题进行分析阐述，以促进芳樟这一我国珍贵经济树种得以健康快速的发展，尽快实现产业化开发利用。     

湖北杨树工业原料林培育中的几个问题

分析了湖北省杨树工业原料林培育中杨树品种选择、定向培育及产业化经营中存在的问题 ,并提出了发展的建议与今后的科研重点     

A biomechanical analysis of industrial forest plantation workers in East Kalimantan

The objectives of this study are to clarify physiological work loads and physical loads acting on the lumbar region of workers and to propose a safe work environment in tropical forestry operations. The research was conducted in the industrial forest plantations of East Kalimantan, Indonesia, in 1996. In this study, heart rates and the physical lumbar burden of industrial forest plantation workers were measured for three types of work, that is, weeding, planting and path clearing. In addition, the load moment at the L₅/S₁ and the disc compression force were calculated using low-back biomechanical models. As a result, compression forces at the L₅/S₁ disc during weeding, planting and path clearing were estimated and found to be below the Action Limit (AL) by National Institute for Occupational Safety and Health (NIOSH). However, it was also found that some work posture types during path clearing by chain saw were sometimes above the AL. A part of this paper was orally presented at the 108th Annual Meeting of the Japanese Forestry Society (1997).