Báo cáo lâm nghiệp: " Probability of ectomycorrhizal infection in a declining stand of common oak" pot

... common oak decline in relation to mycorrhizal status. Thus, a preliminary study on the probability of mycorrhizal infection in an Italian area affected by decline was carried ... quantitative analysis of root samples shows a significant decrease in mycorrhizae proportion between nondeclining and declin-

Ngày tải lên: 08/08/2014, 18:21

... of con- tainer type. The slope of the linear regression of F to P was significantly smaller in ST than in LT and MT, indicating that lower flows were obtained in ST for a particular pressure value. ... holes in the base facilitate drainage and encourage air pruning of roots. Continual air pruning induces a limita- tion to the main root growth by shortening its length to the...

Ngày tải lên: 08/08/2014, 00:22

... probabilities (the average probability of excluding, by genetic analysis alone, a given individual/couple as a father/ parent/parent pair of an offspring, when it is not a true father/parent/ parent ... MATERIALS AND METHODS 2.1. Plant material The studied stand is situated at 755–810 m .a. s.l. in a flat sandy region in the Castilian Plateau, central Spain (figure 1). The...

Ngày tải lên: 08/08/2014, 01:21

... respiration of standing Quercus acutissima trees in Nakaizu, Japan Y. Kakubari Laboratory of Silviculture, University of Shizuoka, Shizuoka, Japan Introduction To compare annual ... with an interface board to an I/O processing unit and infrared gas analyzer (Kakubari, 1988). Results and Discussion Seasonal fluctuations in bark respiration rates in...

Ngày tải lên: 09/08/2014, 04:20

... fenced since 8 years to protect young trees from game damage. Within each included stand a temporary 400 m 2 quadrat was ran- domly placed at a minimum of 10 m away from forest roads, clearings, etc., ... with a maximum of 200 iterations and 30 runs with ran- domized data. Axes of the DCA and NMS ordinations were compared by calculating pairwise Spearman rank correlation coeffi...

Ngày tải lên: 08/08/2014, 00:21

... pine plantations of Australasia, Ph.D. thesis, Australian National University, Canberra, 1998, 228 p. [8] Alexander M.E., de Groot W.J., Fire behavior in jack pine stands as related to the Canadian ... species has traits allowing a fast rees- tablishment [47, 48]. Fire behaviour models offer an objective basis to evaluate, select and plan stand and fuel management practices aimed at s...

Ngày tải lên: 08/08/2014, 01:22

... paper patterns of hybridization and of the mating system of Q petraea and Q robur have been inferred from examination of allo- zyme variation in 2 cohorts of a stand comprised ... Italy Summary — Patterns of hybridization and of the mating system of Quercus petraea and Quercus robur have been inferred from examination of allo...

Ngày tải lên: 08/08/2014, 19:21

... such as reoviridae and cryptoviri- dae and that certain plant species and cul- tivars may contain nonviral (cellular) dsRNA (Grill and Garger, 1981; Wakarchuk and Hamilton, ... transmission Leaf material was homogenized in a phosphate buffer (0.2 M, pH 7.0). After adding celite as abra- sive, this plant sap was inoculated on test plants such as...

Ngày tải lên: 08/08/2014, 18:21

... of mathematical and statistical evaluation methods, Mathematical and statistical processing of sets with measured data (Z 2004). Estimations of parameters of the basic set differ in qualitative ... investigated area (open space 34% of damaged individuals, below the stand 32% of dam- aged individuals) whilst average damage in the CR is 21% of damaged individuals. Tab...

Ngày tải lên: 07/08/2014, 03:22

... stand age and proportion of salvage cutting in actual timber stock. Subsequently, using available data from forest management plans and records of salvage cutting, scores for critical damage ... u- ence of cardinal, ordinal and binomial explanatory variables (Table 1) on critical forest damage occur- rence. Deviance residuals and Pearson χ 2 residuals were calculated to check t...

Ngày tải lên: 07/08/2014, 10:21