Báo cáo lâm nghiệp: "Effect of species composition, stand density and site index on the basal area increment of oak trees (Quercus sp ) in mixed stands with beech (Fagus sylvatica L ) in northern France" potx
Báo cáo lâm nghiệp: "Effect of species composition, stand density and site index on the basal area increment of oak trees (Quercus sp.) in mixed stands with beech (Fagus sylvatica L.) in northern France" potx
... the stand basal area increment as a function of dominant height, height increment of the dominant trees, and stand density. To allocate the stand basal area increment to the individual tree basal ... increment in pure and mixed stands. Growth of oaks in mixed stands with beech 461 The effects of stand density (Rdi o ak + beec...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Effect of tree species substitution on organic matter biodegradability and mineral nutrient availability in a temperate topsoil" pptx
... mat- ter, and not with the clay minerals. The incubation of the A 1 (0–5 cm) layer originating from the same type of soil un- der different forest stands growing in similar local conditions showed different ... Water-extractable soil carbon in relation to the belowground carbon cycle, Biol. Fertil. Soils 25 (199 7) 196–201. [21] Jenkinson D.S., The fate of plant...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: " Effect of species and ecological conditions on ellagitannin content in oak wood from an even-aged and mixed stand of Quercus robur L. and Quercus petraea Liebl." docx
... castalin, vescalin and ellagic acid content and the percentage of vescalin, castalin, roburin A and C on the one hand and the percentage of vescala- gin and vescalagin/castalagin ratio on the other ... mean el- evation of the stand is 140 m. The stand is included in a continuous forest of 700 ha, consisting mostly of naturally regenerated stands of...
Ngày tải lên: 08/08/2014, 00:22
Báo cáo lâm nghiệp: "Effect of Melampsora larici-populina on growth and biomass yield of eight clones of Populus nigra" ppsx
... distinguish the clones from each other in the best way as for the intensity of rust infection. Yield decline was quite low (9 %) in clone 49, which belonged to the most infected clones. Similarly, in ... infection re- mained stable in the tested set of clones during the trial. e intensity of infection during the growing sea- son in 2005 and 2007 was ev...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Effect of leaf biomass and phenological structure of the canopy on plot growth in a deciduous hardwood forest in northern Japan" pot
... precipitation during the growing season (May-October). We also examined whether strong winds resulted in early leaffall by regress- ing relative monthly leaffall (the ratio of monthly leaffall to annual leaffall) ... emerge in early spring; these main- tain foliage with minimal investment in stem elongation. Long shoots have long stems with several late leaves that continue to emer...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Effect of single Quercus ilex trees upon spatial and seasonal changes in soil water content in dehesas of central western Spain" potx
... Soil water content in dehesas 357 Table I. The main characteristics of the soils and Q. ilex trees at the experimental sites (mean values). Site Soil type Depth (cm) Sand ( %) Silt ( %) Clay ( %) ... Cerro Lobato (a and b, respectively), and at Baldío (c and d, respectively). Bars indicate monthly precipitation. Autumn rainfalls refilled quickly the soil water...
Ngày tải lên: 07/08/2014, 16:21
Báo cáo lâm nghiệp: "Effect of an oil heat treatment on the leachability and biological resistance of boric acid impregnated wood" pps
... element of the mix, we followed the amount of leached boron along the leaching procedure by using In- ductively Coupled Plasma analysis (ICP) of leachates, leached and unleached samples. Analyses ... 0 5 10 15 20 25 30 35 40 45 50 55 60 65 Linseed oil Rapeseed oilSoybean oil % of mass loss Control (o) (o) (o)(0. 5) (0. 5) (0. 5) (0. 5) (1. 0) (1. 0) (1. 0...
Ngày tải lên: 07/08/2014, 16:21
Báo cáo lâm nghiệp: "Effects of resource availability on condensed tannins and nitrogen in two Quercus species differing in leaf life span" doc
... mm) and with two nutrient availabilities (standard substrate and 7% increase in soil N). The concentrations of soluble condensed tannins (CT) and nitrogen in the leaves were analyzed to test the ... Z., Effect of daily supplementation of polyethylene glycol on intake and di- gestion of tannin-containing leaves (Quercus calliprinos, Pistacia lentiscus and Cer...
Ngày tải lên: 07/08/2014, 16:21
Báo cáo lâm nghiệp: "Effects of microsite variation on growth and adaptive traits in a beech provenance trial." pps
... spa- tial arrangement of blocks used was very ineffi cient in handling the microenvironmental variation with- in the trial site. All blocks are clearly heterogeneous with respect to all environmental ... obvious spa- tial continuity not only at the tree level but also at the provenance level (raw data available at the cor- responding author), we mapped the variation of s...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Effects of drought and heat on forest insect populations in relation to the 2003 drought in Western Europe" ppt
... outbreak levels, were locally observed in the fall of 2004 in the West and Southwest of France, in the Southern Alps and in Corsica [15]. A mild 2003–2004 win- ter may have allowed remaining larvae ... high population levels of the beech woolly aphid, Phyllaphis fagi L. were observed in 2004 (Fig. 2) following a period of latency of several years. Vigorou...
Ngày tải lên: 07/08/2014, 16:20