Báo cáo lâm nghiệp: "Available nitrogen in the surface mineral layer of Serbian forest soils" docx

... relation between the extent of the damage and the individual characteristics of the experimental plots. e relation between the extent of the damage and the method of estab- lishment of the stands ... explored the ecological conditions, which influence the female Melolontha hippocastani F. in their selection of the locality for laying eggs. In the regio...

Ngày tải lên: 07/08/2014, 03:22

... study of the synusiae of small terrestrial mammals of pheasantries in southern Moravia is therefore aimed at monitoring the effect of specific properties of these habitats (high diversity of biotopes, ... supplementary food in the form of feeding for pheasants. Moreover, in the region of southern Moravia, pheasantries represent isolated areas of woo...

Ngày tải lên: 07/08/2014, 03:22

... conditions. SHORT COMMUNICATION Species composition in low mountain beech (Fagus sylvatica L.) stands in the Bieszczady National Park under the global warming D. S 1 , R. J 1 , G. R 1 , ... in the fir volume and the increase in beech volume was collected. – However, the increasing share of beech, accompa - nied by a decrease...

Ngày tải lên: 07/08/2014, 03:22

... us- ing engineering structures and drainage and have rather large longitudinal inclines, which in most cases does not allow using them for the passage of wheeled machinery skidders and tractors ... damage to the bearing surface and soil sampling. Before the beginning of investigations the radius of turns, lengths of linear plots, weight and geometrical parameters...

Ngày tải lên: 07/08/2014, 03:22

... subtraction of the initial content of available mineral N (for the anaerobic incubation of NH 4 + -N content); N initial ‒ initial content of available mineral N (for the anaerobic incubation of NH 4 + -N ... the mineralization of nitrogen in the sur- face mineral layer of forest soils is diff erent from that in the forest fl oor. Besides, total c...

Ngày tải lên: 07/08/2014, 10:21

... difference in the index was confirmed in the spruce virgin forest in the altitudi- nal range of 1,300–1,400 m. e analysis of the structure of the spruce virgin forest in Nefcerka NNR assessed according ... Education of the Slovak Republic, Project No. 0082-06. A change in structural diversity and regeneration processes of the spr...

Ngày tải lên: 07/08/2014, 10:22

... 10.1051 /forest: 2006054 Original article New insights in the recognition of the European ash species Fraxinus excelsior L. and Fraxinus angustifolia Vahl as useful tools for forest management Pierre ... common ash (Fraxinus excelsior L.) and the narrow-leaved ash (F. angustifolia Vahl. ) in Western Europe. The former is sought-afte...

Ngày tải lên: 07/08/2014, 16:20

... article Climatic signal in annual growth variation of silver fir (Abies alba Mill.) and spruce (Picea abies Karst.) from the French Permanent Plot Network (RENECOFOR) Franỗois L * UMR INRA-ENGREF 1092 ... explores the growth/ climate relationships in earlywood, latewood and total ring-width chronologies of five Norway spruce (Picea...

Ngày tải lên: 07/08/2014, 16:21

... Europe: a comparison between archaeological and actual oak ring series (Quercus robur and Quercus petraea) Kristof HANECA a *, Joris VAN ACKER a , Hans BEECKMAN b a Ghent University, Department ... three archaeological sites in Flanders. N: number of tree -ring series. AV. No. TR, AV. RW and AV. STDEV: the average number of tree rings, the avera...

Ngày tải lên: 08/08/2014, 00:22

... for Maritime pine stands at the stand scale and at the tree scale, within this general framework. 4.1. Vulnerability to wind at the stand scale 4.1.1. Stand density and the damping stand effect Thinning ... pinaster Aït. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged...

Ngày tải lên: 08/08/2014, 01:21

... 10.1051/forest:2004030 Original article Decay resistance in Dicorynia guianensis Amsh.: analysis of inter-tree and intra-tree variability and relations with wood colour Nadine AMUSANT a *, Jacques ... Variability of durability and colour of Dicorynia guianensis 377 Figures 8 and 9 give respectively reflectance of Z1 (outer heartwood) and Z3 (...

Ngày tải lên: 08/08/2014, 01:21

... between N and other nutrients in the needles; (c) the frost sensitivity is related to the concentrations of sugar and starch in the bark; (d) the concentrations of sugar and starch in the bark are ... In another study on 30–40 year-old Norway spruce in southern Sweden, the frost sensitivity of the bark and hardiness status of needles were rela- ted to...

Ngày tải lên: 08/08/2014, 01:21

... Original article Enzymatic polymorphism in natural populations of the sawfly Diprion pini L (Hymenoptera: Diprionidae) L Beaudoin JP Allais C Géri 1 1 Station de zoologie forestière, ... females and E2 males. The allele frequencies of the allozymes in the six french D pini populations are given in table I. The allelic frequen...

Ngày tải lên: 08/08/2014, 18:21

... C. (1987) Molecular and cellular events of self-incompatibility. Int. Rev. Cytol. 107,333-366 Hawkes R. (1982) Identification of concanavalin A-binding proteins after sodium dodecyl ... presence of P nigra and P alba pol- len tubes inside stigmatic tissues. How- ever, increasing protein bands were detectable, 0-20 h after pollination, only in c...

Ngày tải lên: 09/08/2014, 04:20

... attractive tool for overcoming inter- specific incompatibility in poplars. Sexual reproduction in Populus II. Information molecules of the pollen grain M. Gaget 1 M. Villar 2 C. ... semi-tected exine (Figs. 1 and 2). The presence of a great amount of osmiophilic components in the pollen coat is observed within the arcades of the...

Ngày tải lên: 09/08/2014, 04:20