Báo cáo lâm nghiệp: "Variability and heterogeneity of humus forms at stand level: Comparison between pure beech and mixed beech-hornbeam forest" ppsx

Ngày tải lên: 07/08/2014, 03:22

... 38–44 Spatio-temporal patterns of the Norway spruce decline in the Beskid Śląski and Żywiecki (Western Carpathians) in southern Poland W. G Department of Forest Management in Mountain Regions, ... northern part of Beskidy Mts. was as- sessed as poor, and improving southward – the best was in the southern parts of Beskid Żywiecki....

Ngày tải lên: 07/08/2014, 03:22

... remarkable increase in wood density along the stem radius in all the models. In the CW zone, the increase is more distinct in the first 40 years of growth, then the wood density stagnates. In the other ... trend when density increases with the increasing percentage of compression wood in the sample. When there is 10% of compression wood i...

Ngày tải lên: 07/08/2014, 03:22

... Research Intention of Institute of Systems Biology and Ecology, Project No. AV0Z 60870520. Long-term effects of CO 2 enrichment on bud phenology and shoot growth patterns of Norway spruce juvenile ... acceleration of bud phenology result in prolonga- tion of the shoot growth period and in a subsequent enhancement of wood production (B...

Ngày tải lên: 07/08/2014, 03:22

... Variability of spruce (Picea abies [L.] Karst.) compression strength with present reaction wood V. G, H. V Faculty of Forestry and Wood Technology, Mendel University of Agriculture ... the compression strength of fresh spruce is (44%) higher than that of normal wood. e objectives of this paper are to find out the lim- its of compression...

Ngày tải lên: 07/08/2014, 04:20

... main tree species, the input data being the tree diameter and height, quality of the bottom third of the stem (A, B, C), stem damage (yes, no), and in the case of the beech also the age and ... for assessing the forest state – survey of natural conditions and forest ecology, detection of forest stands condition for forest management needs, and...

Ngày tải lên: 07/08/2014, 04:20

Ngày tải lên: 07/08/2014, 16:20

... approach has proved very interest- ing and useful in the case of complex decline syndromes where multiple abiotic (including drought) and biotic (pathogens and insects) factors are involved [80, 85,106, ... PROCESSES AND MECHANISMS Theoretically, three main types of drought- disease interac- tion can be expected: – A direct effect of drought on pathogens; – Indirect effe...

Ngày tải lên: 07/08/2014, 16:20

... early-successional forest stands with red oak and black cherry was tested as a way of improving productivity on abandoned agricultural land of North American temperate deciduous forests. A partial ... associated with increased growth of black cherry. Both height and diame- ter growth were increased, pointing to an increase in available light at the top of the se...

Ngày tải lên: 07/08/2014, 16:20

... edge of P-1). The regeneration of the stands is always natural (shoot + seedling); no planting was identified in the woodlots studied. Clearing, thinning of seedlings, early thinning and pruning were ... particu- larly concerning the density of the maintained standards, but were often in the framework of a cordial relationship. Cutting regimes in small forest 927 [20]...

Ngày tải lên: 07/08/2014, 16:20

... weeks of culture, on the rooting medium, root- ing took place only in the presence of auxin or putrescine. IBA alone induced 30−50% rooting depending on its con- centration, producing swollen and ... Regional teak marketing and trade, Proceedings of third regional seminar on teak, Indonesia, 2001, pp. 1–14. [3] Castro R.D., Diaz G.J., Linero J.C., In vitro clonal...

Ngày tải lên: 07/08/2014, 16:20

... by the square root of the respective sampling variances, obtained from the inverse of the aver- age information matrix. Using the estimated components of variance, approximations of additive genetic, ... from the sampling (co )variances of the components in the denominator of equation (3). The standard errors of were calculated according to the general e...

Ngày tải lên: 08/08/2014, 00:21

... stand age when the first thinning occurs; years since previous thinning for the other thinnings; remaining basal area. For the final cutting: years since the last thinning to the first regen- erative ... 493501 â INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2005054 Original article Optimising the management of Pinus sylvestris L. stand under risk of fire in...

Ngày tải lên: 08/08/2014, 00:22

... that (i) the variability and heterogeneity of humus form are correlated with the spatial pattern of stand canopy, (ii) humus forms are more active within mixed stand and (iii) the improvement of ... 10.1051/forest:2005110 Original article Variability and heterogeneity of humus forms at stand level: Comparison between pure beech and mixed be...

Ngày tải lên: 08/08/2014, 00:22

... to semi-arid regions [37]. Mature trees of Faidherbia albida are famous for their [19] Ismail A. M., Hall A. E., Inheritance of car- bon isotope discrimination and water-use ... A. , Loustau D. and Ferhi A. , Genetic and environmental determinants of water-use efficiency and car- bon isotope discrimination in forest trees, in: Sa...

Ngày tải lên: 09/08/2014, 04:20