Báo cáo lâm nghiệp: "Fertilization at planting impairs root system development and drought avoidance of Douglas-fir (Pseudotsuga menziesii) seedlings" pot

... article Fertilization at planting impairs root system development and drought avoidance of Douglas-fir (Pseudotsuga menziesii) seedlings Douglass F. JACOBS a,b *, Robin ROSE a , Diane L. HAASE a , Patricio ... the poor root development of seedlings fer- tilized at a relatively high rate in this study. We expected increased root proliferation at or above...

Ngày tải lên: 08/08/2014, 01:22

... Temporal patterns of soil temperature (a) and soil water content (b) in the oak, mixed and beech stands (zones without moisture treatment, n = 3) and comparison of soil water content variations ... variables: stand, moisture treatment, the interaction between stand and moisture treatment, and the two random effects ‘date’ and ‘location’. The models were all fitted with the MIXED...

Ngày tải lên: 07/08/2014, 16:20

... temperatures, plant cells en- counter three main problems; alterations in the availability and status of water (dehydration), changes in the spatial organiza- tion of biological membranes, and ... the length of the new roots from the root ball (root egress) was measured and classified under seven categories: 0 = no regenerated roots; 1 = several roots < 1 cm long; 2 = 1to3roo...

Ngày tải lên: 07/08/2014, 16:21

... interactions (Gaude and Dumas, 1987). After silver nitrate staining, qualitative and quantita- tive differences could be observed, related to the presence of P nigra and P alba ... Molecular and cellular events of self-incompatibility. Int. Rev. Cytol. 107,333-366 Hawkes R. (1982) Identification of concanavalin A-binding proteins after sodium dod...

Ngày tải lên: 09/08/2014, 04:20

... tristationnel de descendances de Douglas (Pseudotsuga menziesii (Mirb.) Franco) C E. DUREL NRA, Station d’Amé B. ROMAN-AMAT ration des Arbres forestiers INRA, Station d’Amélioration ... the contribution of each site and family to the overall interaction sum of squares is evaluated through its relative interactivity defined as the inverse of Wxt...

Ngày tải lên: 09/08/2014, 06:22

... significant three years later at all heights (Fig. 2; year 6). The treatment effect on understory density (UD), as evaluated by the ratio of the light measured at 50 cm and that at 2 m (Eq. (1)), was ... and negative effects of competitor removal, Ecology 79 (1998) 65–78. [12] Carnevalea N.J., Montagnini F., Facilitating regeneration of sec- ondary forests with the use of mixed...

Ngày tải lên: 07/08/2014, 16:20

... Mts. and the Bohemian-Moravian Upland (see stand situations 1 and 3) (Tables 1, 2, 3). Root system development and health condition in the trees from planting with no root system deformations ... parameters of the shoot part, root system type, deformation, rooting depth, rots Stand marking Stand situation Shoot height (cm) d 1.3 (mm) Root system type (% of...

Ngày tải lên: 07/08/2014, 04:20

... optimal aggregation pattern. Fig. 4a shows the optimal solution that specifies the optimal spatial pattern of the two-cut system. Following the opti- mal aggregation pattern, 11 aggregated units ... Republic 3 Department of Mathematical Analysis and Statistical Inference, The Institute of Statistical Mathematics, Tachikawa, Tokyo, Japan ABSTRACT: We propose a spatial aggregation m...

Ngày tải lên: 07/08/2014, 10:21

... difference, s standard deviation of differ- ences, n number of observations and t n–1 (α) critical value of Student’s distribution with n – 1 degrees of freedom. Under assumption of the normal ... sum of log volumes gives the volume of the stem. e form height is a ratio between the stem volume and the diameter at breast height. e method of measuring the diameter at...

Ngày tải lên: 07/08/2014, 10:21

... 2004. Figure 7. The potential distribution and dispersal areas of Monochamus alternatus in China. Based on –10 and –4 ◦ C isotherms of January mean air temperature (Climatological Atlas of the People’s ... Comparison of the effects of low acclimation temperature (5 and 0 ◦ C) for 1/4d,1dand4dontheSCPsofMonochamus alternatus for autumn and overwintering 4–5th instar larvae. 4–...

Ngày tải lên: 07/08/2014, 16:20