Báo cáo lâm nghiệp: "Attraction of the Japanese pine sawyer, Monochamus alternatus, to volatiles from stressed host in China" potx

... (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pinene: ... SE eggs/female 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (+)-α-pinene (-)-β-pinene (+)-3-carene Terpinolene (+)-α-pinene: (-)-β-pinene: (+)-3-carene:terpinolene (+)-α-pinene: (-)-β-pine...

Ngày tải lên: 07/08/2014, 16:20

... ranking the highest in adults and the lowest in the overwintering larvae. The SCP has proved to be a reliable index to estimate the cold hardiness of the beetle M. alternatus. The mean SCP of the ... field, in theory the disease is likely to extend farther and even exceed the distribution range of the beetle. The beetle is one of the most important...

Ngày tải lên: 07/08/2014, 16:20

... (A–t). Determination of the percentage of PF resin hardening e aim of studying the character of PF resins in the field of UV spectrum was to determine the amount of the insoluble proportion of a heat-hardened ... percentage of resin hardening, – results of shearing strength tests and the per- centage of hardening the PF resin in a glued joint show t...

Ngày tải lên: 07/08/2014, 03:22

... primarily. After the air pollution induced decay of forest stands in the mountain regions of the Czech Re- public in 1970s to 1990s, there was a problem of autochthonous tree species planting failure on the ... 1998. e in uence of selected factors on the biomass production of the Calamagrostis arundinacea species in the conditions of submountain beech f...

Ngày tải lên: 07/08/2014, 03:22

... performance of healthy roots with energy being concentrated to height increment – the assimilatory tissues begin to show symptoms of injury. After breaking “certain bounds” the remaining operating ... observed to exhibit up to a 60% decrease in the biomass of fine roots. All injured trees were observed to exhibit up to a 60% increase in the vitality of fine...

Ngày tải lên: 07/08/2014, 03:22

... dis- tribution of age classes occurred mainly due to the realization of regeneration felling, including salvage felling in the stands of lower age classes. Dynamic changes in the distribution of the ... country. In the Slovakia considerable attention has been paid to the issues of wood production and regulation of its felling. Permanent forest monitoring...

Ngày tải lên: 07/08/2014, 03:22

... disseminated throughout the forest landscape; it does not appear to be the harvesting of fuelwood areas. Management of these forests with the main objective of maintaining the production of all ... socio-economic study in the SNP. My aim was to get a better understanding of the local customs. Propos- als to the government for a sustainable management of...

Ngày tải lên: 07/08/2014, 03:22

... started in the eighties, at the time of the culmination of air-pollution disaster. In that period, within the programme of the gene conservation of indigenous forest tree species in the Krkonoše ... for one hour to induce stomatal opening. Parts of annual shoots were then used for the evaluation of water losses. Single needles were taken from the re...

Ngày tải lên: 07/08/2014, 03:22

... analysis of the yield class changes showed that within thinning research plots the differences depend mainly on the type of thinning. Plots with crown thinning have the lowest 5-year change in site ... number of all 550 repeated measurements 70% of them were used for the construction of yield ta- bles and the remaining 30% are new measurements. With regard to th...

Ngày tải lên: 07/08/2014, 03:22

... studied area. In the interest of sup - port of the red deer floodplain ecotype and in order to restrict possible inbreeding, we recommend to extend its breeding basis through an increase in the target ... to the present 7.9%, and the production of biomass of woody origin at 29.3% compared to the present 23.7%. In spite of the sufficient supply of foo...

Ngày tải lên: 07/08/2014, 10:21