Báo cáo lâm nghiệp: "Interactions between root symbionts, root pathogens and actinorhizal plants" doc

... 2-fold increase of nodule number/plant. In older soils Interactions between root symbionts, root pathogens and actinorhizal plants A. Akkermans, D. Hahn ; F. Zoon Department of Microbiology, ... effect on nitrogen-fixing actinorhizal plants. In the present paper, we will give an over- view of the interactions between root sym- bionts, pathogens...

Ngày tải lên: 09/08/2014, 04:20

... the other hand, Lambeth et al. [19], in E. grandis and Menck and Table IV. Comparison of means (and associated F-test) between cuttings and seedlings and variances values for family and clones (and ... this species by Sasse and Sands [25] and Sasse and Sands [27]. These authors reported more deformities and less radial symmetry in the root system of cuttings and conc...

Ngày tải lên: 08/08/2014, 00:22

... regions of North and South America. Their biomass and fruit production which can be very large (Pinto and Riveros, 1989), and their N2 -fixing ability (Felker and Clark, 1980) ... production and other factors may be more important (Gif- ford and Jenkins, 1982; Walker and Sivak, 1986). Provenances with high growth rates had many branches a...

Ngày tải lên: 09/08/2014, 04:20

... determined between the tree height, width and length of crown and the horizontal width of root plate, average calculated width of root plate, theoretical surface of root plate and visible surface of root ... of root plate, theoretical surface of root plate and visible surface of root plate. A medium correlation was found out between the stem diameters, tree height...

Ngày tải lên: 07/08/2014, 10:22

... methods [23] (Tab. II). Total root length (cm), root average diameter (cm), number of root tips and pre-existing white roots (length, diameter and tips of white roots already present on the plug ... dry Weight, S (g) Root dry weight, R (g) Root average diameter (mm) Root length (cm) / Root tips White roots length (cm) White roots average diameter (mm) White roots tips (#) N...

Ngày tải lên: 07/08/2014, 16:21

... of mother roots (length per volume of soil), (ii) abundance of fine roots (number per length of mother roots), and (iii) dry weight of fine roots per dry weight of mother roots. 2.4. Assessment of root ... Ainvelle, Mersuay and Filain, root systems of 60, 60 and 55 oaks respectively were studied for C. fusipes infection as described by Marçais et al. [25]. Briefly, the root collar...

Ngày tải lên: 08/08/2014, 01:21

... importance. Relationships between dominance and damage are documented and commented in literature, however, often without more detailed analysis and statistical documentation of their significance ... 0.702, α = 0.05) between the percentage of damaged individuals and dominance. P (1986) found out the nega- tive correlation between damage and dominance for Pinus sylv...

Ngày tải lên: 07/08/2014, 10:21

... vari- ables, except for twigs number (57%), root diameter (68%), P, K and soluble sugar concentrations (61, 58 and 52%, re- spectively) and N, P and K contents (79, 78 and 76%, respec- tively). Figure 3A ... geological and historical land-use factors that have caused soil erosion and degradation. Dur- ing the last 30 years, important and reiterated wildland fires, mainly asso...

Ngày tải lên: 07/08/2014, 16:21

... s –1 bins between 0 and 50 µmol m –2 s –1 and in 100 µmol m –2 s –1 bins between 50 and 2050 µmol m –2 s –1 . PPFD was simultaneously recorded for the individuals in the understorey and in ... photosynthesis (A maxa and A maxm ), leaf thickness and density The correlations between A maxm , A maxa and leaf density and thickness are presented in Table V. A maxa wa...

Ngày tải lên: 08/08/2014, 00:22

... Lorraine) and within stands (3 trees in each stand), whereas the number of stands visited was important (12 stands, 8 forest districts, Tab. I). 2.3. Statistical methods When the dead and living ... correlation between knot diameter and easily assessable traits like stem size (stem height and diameter) or stand parameters (age, fertility, density). In France, such stem and stand...

Ngày tải lên: 08/08/2014, 01:22