Báo cáo lâm nghiệp: " Release of oxalate and protons by ectomycorrhizal fungi in response to P-deficiency and calcium carbonate in nutrient solution" pptx
Báo cáo lâm nghiệp: " Release of oxalate and protons by ectomycorrhizal fungi in response to P-deficiency and calcium carbonate in nutrient solution" pptx
... 10.1051/forest:2003076 Original article Release of oxalate and protons by ectomycorrhizal fungi in response to P-deficiency and calcium carbonate in nutrient solution Jean-Claude ARVIEU, Franck LEPRINCE, Claude ... The objective of this work was therefore to quantify the release of oxalate and/ or protons by six ectomycorrhizal iso- lates be...
Ngày tải lên: 08/08/2014, 01:21
Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. I. Trees and forest floor daily transpiration" ppsx
... velocity profiles of water flow in trunks of Norway spruce and oak and res- ponse of spruce to severing, Tree Physiol. 10 (1993) 367–380. [12] Clearwater M.J., Meinzer F.C., Andrade J.L., Goldstein G., ... contribution of each tree to total daily SFD, confirmed that in thinned and/ or declining stands SFD is more heterogeneous [6, 25, 26]. Our results in the thinned plo...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Evapotranspiration of a declining Quercus robur (L.) stand from 1999 to 2001. II. Daily actual evapotranspiration and soil water reserve" potx
... varied between 18% and 44% of inci- dent rain according to the years. Nizinski and Saugier [27], in a 120 years old sessile oak stand estimated In% from 28% to 41.2%. Those values stand well with ... greatly to ET in each plot, ranging from 0.75 to 3.1 mm per day in the thinned plot and from 0.3 to 3.6 mm per day in the control one. Forest floor ET repre- sented up...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Micropropagation of hybrid walnut trees (Juglans nigra x Juglans regia) through culture and multiplication of embryos" ppt
... proposed to explain the influence of agar. These include the pres- ence of inhibitors, rate of diffusion of mole- cules and variability in the availability of water. This last ... defined by McGranahan et al. (1987). Three main steps have been determin- ed: 1) elongation of epicotyls and buds during 3 wk of darkness followed by 2 w...
Ngày tải lên: 09/08/2014, 04:20
Báo cáo lâm nghiệp: "Composition of psocid taxocenoses (Insecta: Psocoptera) in Fageti-Piceeta s. lat. and Piceeta s. lat. forests in the Western Carpathian Mts" pps
... complemented by an individual collecting of adults. During sweeping and beating, 30 sweepings or beatings were carried out in each locality. Caught psocids were sucked into the exhauster and stored in ... super-ellipsoid. In the second phase, par- tial complexes of vectors are divided according to species ordinate in particular vectors and accord- ing to abundance...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Study of natural hybridization between Alnus incana (L.) Moench. and Alnus glutinosa (L.) Gaertn" pptx
... the end of flowering of A. incana falls as usual on the beginning of flowering of A. glutinosa. Separate samples of A. incana due to their biologi- cal peculiarities or under in uence of microclimatic ... In A. incana, on the average, 1–3.2 glands occur on 1 mm 2 of the surface chosen by chance; in A. glutinosa – about 0.4; and in hybrids – 3–9 glands. Catkins...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Analysis of some dynamic series of forest production and trends of forest economics in the Czech Republic" ppt
... done of selected technical indica- tors of the production such as timber felling (total felling, of this conifers, broadleaved species, felling intensity) and forest regeneration (total, of this ... increasing and recently exceeded 15 mil./m 3 . e proportion of coniferous timber ranges around 90% (of this spruce ca 75%). Figures of timber felling, felling intensity an...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Amounts of throughfall and lysimetric water in a sub-mountain beech forest in the Kremnické vrchy Mts" ppt
... collection and processing of throughfall water were carried out according to K (2002). At four-week intervals, we also took totals of gravitational water from the soil depths of 0.10 and 25 ... e in uence of the cutting intervention on the water regime of plots was found less pronounced mainly in 1989 – probably due to the absorption effect of the herbal synus...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Occurrence of Ips duplicatus (Coleoptera: Curculionidae, Scolytinae) on pines (Pinus sp.) in the Czech Republic and southern Poland – Short Communication" pdf
... to the findings in Poland, next to the outbreak area (G 1997). The incidental infestations on Scots pine were also observed recently in North- ern Poland (Kartuzy Forest District), in ... densities. In the study area in the Czech Republic, spruces are declining because of drought and honey fungus attacks and 50–60% (n = 635) of them are consequently infested...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties" pot
... damage to forest stands in moun- tain regions of the Czech Republic. Reference s BALCAR V., KACÁLEK D., 2008. European beech planted into spruce stands exposed to climatic stresses in mountain areas. ... 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...
Ngày tải lên: 07/08/2014, 03:22