Báo cáo lâm nghiệp: "The influence of acid mist upon transpiration, shoot water potential and pressure—volume curves of red spruce seedlings" pot
Báo cáo lâm nghiệp: "The influence of acid mist upon transpiration, shoot water potential and pressure—volume curves of red spruce seedlings" pot
... signifi- cant effect of acid rain /mist upon cuticle structure and/ or resistance. The lack of The influence of acid mist upon transpiration, shoot water potential and pressure—volume ... expected to influence plant water status. This paper presents some of the results of a detailed study of the influence of acid mis...
Ngày tải lên: 09/08/2014, 04:20
Báo cáo lâm nghiệp: "The influence of irradiation on the behaviour and reproduction success of eight toothed bark beetle Ips typographus (Coleoptera: Scolytidae)" doc
... vicinity of spruce stands where logs for experiments were collected. Irradiation doses of 15 and 30 Gy were used (co- balt 60). Because of possible problems concerning the rearing of irradiated ... = 0.407, ANOVA). We might predict that the activity of females is connected with the ability of males to mate with females and with maturation and pro- duction of fertile...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "The influence of selected factors on energy requirements for plain milling of beech wood" ppsx
... file. RESULTS AND DISCUSSION The evaluation of the influence of beech with false heart and without it on cutting input is pre- sented in Fig. 4 and Table 1 showing average values of the combination of ... RS232 interface and the data were processed by means of Power QLink 2.1. software (H 2008). Measured values of cutting input were evalu- ated by Microsoft Excel...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: " The influence of Picea abies on herb vegetation in forest plant communities of the Veporské vrchy Mts" ppt
... effect of spruce on the species richness, decrease of mes- ophilous herbs and increase of acidophytes. E (2000b) also reported from the Calcareous Bavarian Alps the occurrence of acid indicators ... to a coniferous canopy and most vascular plants were resilient. T 1985 reported from Swiss spruce stands a reduction of mesophilous herbs and an increase of...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: " The influence of different overstory removal on planted spruce and several broadleaved tree species: Survival, growth and pine weevil damage during three years" pps
... stumps and roots of dying and dead coniferous trees [2]. The adult pine weevil feeds on the bark of young seed- lings shortly after they have been planted and may cause the death of up to 80% of ... L20, L15 and L5 treatments (Fig. 3). In the L100 treatment, beech, oak, lime, cherry and spruce had a higher diameter growth than maple and ash and reached a diam- eter of...
Ngày tải lên: 08/08/2014, 00:21
Báo cáo lâm nghiệp:"The influence of microclimate and tree age on the defense capacity of European beech (Fagus sylvatica L. ) against oxidative stress" pps
... focused on seasonal and spatial changes of antioxidants and pigments [11, 12, 19, 29, 30]. Differences in the content of antioxidants and pigments of sun and shade leaves of Fagus sylvatica can ... 23] and [37] claimed that less than 38% of Fagus sylvatica trees in Western Europe are healthy today. The health and growth of forest trees however, is determined by a varie...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp: " The influence of drought and thinning on leaf area index estimates from canopy transmittance method" pdf
... main ecological and ecophysiological processes in a forest stand. LAI especially influences not only the struc- ture and the development of the stand (growth of the understory, ... heterogeneity of light distribution in the forest stands, were recently reduced with the development of hand-held, battery-powered light sensors which allow a rapid...
Ngày tải lên: 08/08/2014, 18:21
Báo cáo lâm nghiệp: "The results of manipulated experiments with inoculation of Ips typographus (L., 1758) to spruce trees under various levels" potx
... 3 and 4 and P = 0.924 for 3 and 5, and P = 0.530 for 4 and 5). e end of July 2006 was characterized by rela- tive lack of precipitation but differences between the number of individuals bored ... Large area of such stands along with compound of biotic and abiotic stressors (air pollu- tion, degradation and compaction of soil, nutrients exhaustion, increased acti...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "The use of silica sand in micropropagation of woods" pot
... if there is manifest attenuation and acidification as a result of hydrolysis of the agar. Overall, the degree of hydroly- sis of agar and the characteristics of the media after sterilization ... shaking with the mixture of sand and a liquid medium. 3. Plantlets can sink into sand partly and contact with medium is ideal. 4. Acidity stays at the same pH after autoclaving...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "The root-plant ratio changes in the first growing periods of wild cherry (Prunus avium L.) plantations" pptx
... without leaves, the volume of whole root system and volume of fine roots (thinner than 2 mm) were measured in a glass scaled cylinder filled up with water. e accuracy of scaled cylinder was 50 ... the beginning of the experiment, i.e. 200 plants in total. Samples of 46 plants were randomly extracted from all research plots on May 9, 2006. Samples were cleaned of soil and...
Ngày tải lên: 07/08/2014, 03:22