Báo cáo lâm nghiệp: "Study of natural hybridization between Alnus incana (L ) Moench and Alnus glutinosa (L ) Gaertn" pptx

... into North Africa, Asia Minor, and western Siberia Study of natural hybridization between Alnus incana (L. ) Moench. and Alnus glutinosa (L. ) Gaertn. Е. V. B 1 , V. B 2 1 Central Siberian ... frequency of hybridization in the northern boundary of their areas (Latvia, Ireland and others). Hybridization between A. incana and A. glu...

Ngày tải lên: 07/08/2014, 03:22

... values of ground cover attributes for the five PRP’s PRP ickness of Ah (cm) Regeneration ( %) Litter ( %) Herbs ( %) Dead- wood ( %) Min. soil ( %) Stones ( %) Roots ( %) Moss ( %) D (m) 1 4.3 ... cm of diameter over bark (m 3 ·ha –1 )) , G – basal area (m 2 ·ha –1 ), N – number of trees (individuals·ha –1 ), ρ – stand density, D mean – mean dbh...

Ngày tải lên: 07/08/2014, 10:22

... sample weight (N). – P f,I (Mpa): slope of the curve in the elastic part; ( 8) where S is the length between supports (m); α is the slope of the ori- gin tangent; b is the sample width (m), and (w-a) is ... 3.2.1 (mechanical and machining point of view); in addition, there are good correlations between failure strains and modulus of elasticity (coefficient of determina...

Ngày tải lên: 08/08/2014, 01:22

... development of herbaceous Figure 2. Abundance of spruce and fir-spruce types of regeneration as related to mature stand composition at Site 2. Bl: lowest level of browsing, Bm+h: medium and high level of ... observed) is specified. Bl: Browsing low, Bm+h: Browsing medium + high. ( 1) Comparison of the distribution of the three types of fir regenera- tion with the rest...

Ngày tải lên: 08/08/2014, 00:21

... treatment (C and F) during flooding and 14 days after drainage (day 5 4). Mean ± SE, n = 5, ( *) and (* *) indicate significant differences between flooded and control at p < 0.05 and p < 0.01 ... leaves, cotyledons and roots of floo- ded (F) and control (C) Quercus robur seedlings harvested during flooding and 14 days after drainage (day 5 4). Mean ± SE, n...

Ngày tải lên: 08/08/2014, 00:22

... both PR and BR seedlings diminished the index of root growth at 4.2 (PR seedlings at 4 ºC) and 2.0 (BR seedlings at 10 ºC) (Tab. I). Transpiration rates decreased between 27% and 41% in PR and BR ... (PR, ■ , ) or without (BR, , ) soil around the roots, at 4 ºC (■, ) or 10 ºC ( , ) for 1 (A, B), 8 (C, D) or 15 (E, F) days. Plants were rewatered (right side: recov...

Ngày tải lên: 08/08/2014, 01:22

... potential ( , MPa) in beech and oak see- dlings in the H ( ) and C treatments ( ) measured in the middle of August 1995 (A–B) and 1996 (C–F). Seedlings planted in 1995 (A–D) and 1996 (E–F). Mean ± SE. ψ S Figure ... 10 0) in beech and oak seeded in 1995 (A–C) and in 1996 (D–E) in four treatments and during three years. For a description of treatments see Table II a...

Ngày tải lên: 08/08/2014, 01:22

... (+138 %) and Pinus pinaster (+63 %) (Guehl et al, 199 4). In Q suber, root and shoot biomass, and total leaf area were increased, like in Populus grandidentata Michx (Curtis and ... harvested and divided into roots, stems and leaves. Expanding leaves, secondary roots and stems were segmented. Biomass of each part, length of the m...

Ngày tải lên: 08/08/2014, 18:21

... was focused on the study of natural regeneration of Douglas fir under the parent stand shelter. e parent stand 441D10 is one of the oldest and most productive stands of Douglas fir in mixture ... Š (200 3) and Š and B (200 4) reported that it is possible and convenient to regen- erate high-quality Douglas fir stands in a natural way at favourab...

Ngày tải lên: 07/08/2014, 03:22

... abies (L. ) Karst. 2007 Picea abies (L. ) Karst. 2006 Picea abies (L. ) Karst. 2005 Picea abies (L. ) Karst. 2004 300 J. FOR. SCI., 54, 2008 ( 7): 294–305 2004 to 2007 (TS5 = 1,727.8°C, TS0 = 2,874°C), ... > 0.00 1). Determined correlations correspond with the re- sults of other authors. B and K (199 9) and L (200 1) rep...

Ngày tải lên: 07/08/2014, 03:22