木材检验技术在木材运输中的应用探讨     

凃光华 《广东林业科技》2014,30(1):64-68

文章介绍了木材检验技术在木材运输中的作用与地位,分析了木材运输中常见的木材检验技术误区,阐述了由此引起的责任风险或者造成的危害,并依据现行木材检验标准规定,针对性地提出了规范的木材检验技术操作要领。  相似文献   

正交胶合木应用及发展前景   总被引：1，自引：0，他引：1  

付红梅  王志强 《林业机械与木工设备》2014,(3):4-7,10

介绍了一种新型的工程木产品-正交胶合木的定义、特点、国外发展现状及生产工艺,并指出了正交胶合木在国内的发展前景。  相似文献   

勐腊县珍贵用材林发展可行性研究及树种规划概述     

黄海燕  戴益源  孙亚丽 《林业资源管理》2014,(5):107-114

通过对珍贵用材林发展的概述、市场需求和产业发展趋势的分析,论述了勐腊县珍贵用材林产业发展的迫切性和可行性。在此基础上,针对勐腊县的实际情况,就发展珍贵用材林所用树种及种植技术进行设计规划。  相似文献   

温室条件下巨龙竹和马来甜龙竹的早期生长表现   总被引：1，自引：1，他引：0  

李樨  黄世能  陆庆英  刘敏 《世界竹藤通讯》2011,(4):23-25

于温室内移植巨龙竹和马来甜龙竹实生苗进行培育,调查实生苗的保存率和发笋率,以及实生苗和新笋的高度、叶片数、健康状况和枝条的生长表现。结果表明,巨龙竹和马来甜龙竹的保存率分别为7.3%和38.5%,差异极显著;发笋率分别为66.7%和8.1%,差异也达显著水平。实生苗的高度、叶片数分别为11.3cm、3.1片和11.6cm、3.4片,差异不显著,但2竹种的健康状况之间(2.9级和4.7级)差异显著。新笋的高度、叶片数和健康状况分别为10.1~16.1cm、3.9~4.4片和4.8级,枝条的长度、叶片数和健康状况分别7.3~8.8cm、2.6~2.7片和4.7~4.8级,所有调查指标2竹种间均不存在显著差异。  相似文献   

Supply consequences of subsidizing thinning activities in Sweden     

《Scandinavian Journal of Forest Research》2012,27(1-4):379-386

This paper is an attempt to measure the supply consequences of the thinning subsidy which was in operation during the cutting season 1979/80. The econometric analyses are based on a questionnaire to a sample of 2500 private non‐industrial forest owners, which was produced by the official Swedish investigation SOU 1981:81. The analyses show that it is questionable whether the subsidy did affect the total cut. The estimates of the supply increase range from an average of zero to 122 m³/owner. As a by‐product we obtain estimates of the price elasticity of the private non‐industrial forest owners supply curve. These estimates range from 0.63 to 1.69.  相似文献   

Multivariate product adapted grading of Scots Pine sawn timber for an industrial customer,part 2: Robustness to disturbances     

《Wood material science & engineering》2013,8(6):420-427

ABSTRACT

Holistic-subjective automatic grading (HSAG) of sawn timber by an industrial customer's product outcome is possible through the use of multivariate partial least squares discriminant analysis (PLS-DA), shown by part one of this two-part study. This second part of the study aimed at testing the robustness to disturbances of such an HSAG system when grading Scots Pine sawn timber partially covered in dust. The set of 308 clean planks from part one of this study, and a set of 310 dusty planks, that by being stored inside a sawmill accumulated a layer of dust, were used. Cameras scanned each plank in a sawmill's automatic sorting system that detected selected feature variables. The planks were then split and processed at a planing mill, and the product grade was correlated to the measured feature variables by partial least squares regression. Prediction models were tested using 5-fold cross-validation in four tests and compared to the reference result of part one of this study. The tests showed that the product adapted HSAG could grade dusty planks with similar or lower grading accuracy compared to grading clean planks. In tests grading dusty planks, the disturbing effect of the dust was difficult to capture through training.  相似文献   

STABILIZATION OF DUNE SAND AT BORGO BONSIGNORE IN SICILY / STABILISASIE VAN DUINSAND BY BORGO BONSIGNORE IN SICILIE     

P. J. LE ROUX 《Southern Forests》2013,75(1):44-46

The methods employed and the results achieved in stabilizing an area of about 225 ha dune sand is described. The techniques employed in allowing tree species to become established are mentioned and are illustrated by various plates  相似文献   

木材内部腐朽特征识别专家系统   总被引：4，自引：4，他引：0  

杨学春 《森林工程》2004,20(1):14-15

简单介绍了专家系统在林业上的应用 ,详细阐述了木材内部腐朽特征识别专家系统的设计过程。该系统可以为合理造材 ,提高木材的经济价值提供依据。  相似文献   

甜笋竹引种栽培丰产技术研究   总被引：1，自引：0，他引：1  

邝先松  王波  陈小芸  刘仁林 《江西林业科技》2002,(1):29-31,41

甜竹笋味美甘甜，营养丰富，是上乘的森林蔬菜，市场前景广阔。1993年开始规模化引种栽培与丰产技术研究，结果表明：①甜笋竹适合赣南生长和种植；②掌握了甜竹笋的丰产技术；③种植3a后每hm^2产鲜笋17250kg以上。  相似文献   

五道河林场次生用材林龄级结构调整及评价   总被引：1，自引：0，他引：1  

亢新刚  黄庆丰 《北京林业大学学报》2001,23(3):52-55

龄级结构是森林结构中最重要的结构之一 .该文对河北省五道河林场的次生用材林的龄级结构用数学规划方法进行了调整 ,并用欧氏距离和平衡率 2方法对龄级结构调整的结果进行了评价 ,效果良好  相似文献