Báo cáo lâm nghiệp: "Aboveground biomass relationships for mixed ash (Fraxinus excelsior L and Ulmus glabra Hudson) stands in Eastern Prealps of Friuli Venezia Giulia (Italy)" pptx

... height (D in cm) and total height (H in m). (● ash and ■ wych elm; solid line is ash, dashline is wych elm). 832 G. Alberti et al. reported for spruce, fir and beech stands in Alps and Prealps [3, ... Fraxinus excelsior / Ulmus glabra Résumé – Biomasse aérienne chez des peuplements mélangés de frêne (Fraxinus excelsior L. et Ulmus glabra Hudson) dans...

Ngày tải lên: 08/08/2014, 00:22

... multiplicative error in raw data and the “intrinsically nonlinear” type with an additive ran- dom error. In the “intrinsically linear” model, the original data are log-transformed and the least ... EVK2-CT-1999-00045). REFERENCES [1] Bartelink H.H., Allometric relationships for biomass and leaf area of beech (Fagus sylvatica L. ), Ann. Sci. For. 54 (1997) 39–50. [2] Basker...

Ngày tải lên: 08/08/2014, 01:21

... cordata and Vaccinium myrtillus. Synusiae occur in very shaded locations, mainly in spruce forests. It also occurs in tall pine stands, in the understorey of the dense V. myrtillus- layer. M304. ... smaller trees and saplings were cut and sliced at their root collar. This material was prepared in the laboratory to obtain information on the age of each tree and to allow...

Ngày tải lên: 08/08/2014, 01:21

... s Soil-Chamber contact Collar Collar Inserted / Collar Inserted / Collar Collar Collar 2.4. In situ comparisons Four campaigns of soil respiration measurements took place at the Vielsalm (May 2003), Chaux ... chamber laid on collars (“Collar” R S )andR S measured with the chamber inserted in the soil (“Insertion” R S )for Li-He”(a) and “PP-Ch” (b). The solid line is the 1:1 and the...

Ngày tải lên: 07/08/2014, 16:20

... thinned and unthinned loblolly pine plantations, Va. Polytech. Inst. State Univ. Sch. For. Wildl. Resour. Report No. 82, 1995. [5] Avila O.B., Burkhart H.E., Modeling survival of loblolly pine trees in ... Cubic-foot volume of loblolly pine to any mer- chantable top limit, South. J. Appl. For. 1 (1977) 7−9. [17] Burkhart H.E., Suggestions for choosing an appropriate level for mo...

Ngày tải lên: 07/08/2014, 16:21

... Diéguez-Aranda et al. [21] and Corral et al. [17]. Although all these models fitted the data reasonably well in the preliminary analysis, we finally selected one model from each group for further analysis: ... heteroscedasticity and autocorrelated errors, and models with low multicollinearity should be selected whenever possible [32]. Multicollinearity is a problem associated with alm...

Ngày tải lên: 07/08/2014, 16:21

... A., Guehl J M., Late-stage canopy tree species with extremely low delta C-13 and high stomatal sen- sitivity to seasonal soil drought in the tropical rainforest of French Guiana, Plant Cell Environ. ... Campbell B.D., Cooper J.E .L. , Davison A.W., Gupta P .L. , Hall W., Hand D.W., Hannah M.A., Hillier S.H., Hodkinson D.J., Jalili A., Liu Z., Mackey J.M .L. , Matthews N., Mowforth M.A.,...

Ngày tải lên: 07/08/2014, 16:21

... arranged with all the possible combinations among height/age pairs for each tree and plot, including descending growth intervals. All possible growth intervals typically produce fitted models with a ... Springer-Verlag, New York, 1998. [10] Calama R., Cañadas N., Montero G., Inter-regional variability in site index models for even-aged stands of stone pine (Pinus pinea L. ) in...

Ngày tải lên: 08/08/2014, 00:21

... is pinegrass; other undestory species include Shep- herdia canadensis (L. ) Nutt., Arctostaphylos uva-ursi (L. ) Spreng., Aster conspicuus Lindl., Achillea millefolium L. , and Linnaea borealis L. The ... blocky fragments resem- bling shattered bedrock, and rounded cobbles more typical of glacial till. Sample pit profiles are illustrated in Figure 3 for each cover type. 2.4. Sta...

Ngày tải lên: 08/08/2014, 01:21

... Bailey R .L. , Compatible volume-taper models for loblolly and slash pine based on a system with segmen- ted-stem form factors, For. Sci. 46 (2000) 1–12. [5] Flewelling J.W., Raynes L. M., Variable-shape ... model applicable to all the sites in this study. Restricting the list of equations to only one pre- selected model (for example, any of models (2)–(4)) could have resulted i...

Ngày tải lên: 08/08/2014, 01:22