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广州市林业和园林科学研究院独创的古树树龄鉴定“三段计算法”,已成功为广州市第一至第六批古树名木、中山市首批古树名木、湖南常德市首批古树名木等地进行了树龄鉴定,确定保护级别,为当地实施法定有效的保护。广州市林业和园林科学研究院引进德国进口的LINTAB6树木年轮分析仪,结合“三段计算法”,可以非常精确、稳定地对树木盘片、生长锥钻取的样品、木制样品等进行年轮分析,广泛用于树木年代学、生态学和城市树木存...
建立了同时测定竹笋中9种多环芳烃(PCBs)、16种多氯联苯(PAHs)和13种有机氯农药(OCPs)的分散固相萃取-气相色谱法-串联质谱(DSPE-GC-MS/MS)分析方法。竹笋样品经乙腈提取,以无水MgSO_4、弗罗里硅土和十八烷基键合硅胶吸附剂(C18)作为分散固相萃取净化剂净化,经气相色谱-串联质谱测定,外标法定量。结果表明,方法实现了对38种持久性有机化合物的分离和定量,分析物含量在2...
The chipper for chips is an energy consuming machine. Many factors influence the result of chipping which influence the whole process. The paper deals with the process of wood chipping by a chipper in...
This study presents the effects of operator bias and variation in interactive thresholding on the estimation of light environment using hemispherical photography. Twenty-one hemispherical photographs ...
Adjacency constraints can be represented by Moore or Neumann neighbourhood adjacency, depending upon how candidate neighbours are assigned at corners adjacent to the target cell. Considering Moore and...
The objective of research was to determine the density of juvenile (JW) and mature wood (MW) of selected coniferous species growing in the Czech Republic. The research included the wood of Norway spru...
We propose a spatial aggregation method to solve an optimal harvest scheduling problem for strip shelterwood management. Strip shelterwood management involves either a two-cut system with a preparator...
The aim of this study was to investigate tree-ring width variability and to distinguish groups of trees with similar growth trends in order to study tree growth responses to various stand and site con...
Average skidding distance for forest stands is an important parameter for the determination of the optimum road density and spacing. In this research the real mean skidding distance and theoretical me...
Stand growth and yield models include whole-stand models, individual-tree models and diameter-distribution models. In this study, the three models were linked by forecast combination and parameter rec...
The phenology of four deciduous forest tree species (Carpinus betulus L., Fagus sylvatica L., Quercus dalechampii Ten., Tilia cordata Mill.) was studied in a submountain beech forest stand in Central ...
A field production study was conducted for a manual harvesting system using a chainsaw in a Caspian hardwood forest site. A selective cut was performed on a 42-hectare tract with an average slope of 3...
The combination of georeferenced colour aerial photos and limited field measurements of individual trees was used to determine tree stand biomass in forests of prevailing Norway spruce. The technique ...
The investigation of foliage biomass development including LAI and the growth of spruce and beech stands in the juvenile stage (age 1 to 21 years) represents a special complementary study to long-term...
Net photosynthetic rate (A) and stomatal conductance (gs) of leaves of Nothofagus pumilio and N. an-tarctica seedlings were measured at different photosynthetic photon flux densities (PPFDs, 20, 150, ...

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