Báo cáo lâm nghiệp: "Sustainable cutting cycle and yields in a lowland mixed dipterocarp forest of Borneo" docx

... slightly damaged plots with a remaining basal area ≥ 80% of the original (mean logging intensity = 6 trees ha –1 ). Plots belonging to G2, had a remaining basal area varying between 70 and 79% of the ... large areas. Moreover, matrix models can also pre- dict in a robust way and as reliably as other approaches, stand structure (density, basal area and diameter distribution)...

Ngày tải lên: 08/08/2014, 01:21

... skewness of basal area distribution of the three main tree species in pure jack pine stands and stands composed of a mixture of jack pine and white birch and jack pine and trembling aspen. Source ... skewness in basal area distribution of jack pine between pure jack pine stands and stands composed of a mixture of jack pine and either of white birch or aspen...

Ngày tải lên: 08/08/2014, 01:21

... hardening clone and an early -and- rapidly hardening one; and to test the value of the spectral technique for diagnosing cold hardiness in a breeding situation. 2. MATERIALS AND METHODS 2.1. Plant material A ... originated from continental Russia, dis- played an earlier start and a more rapid rate of cold hardening than the female grandparent (P**), which originated from...

Ngày tải lên: 08/08/2014, 01:21

... surface. Significant changes in the structure of the canine endometrium are associated with degeneration of luminal epithelium, cystic endometrial hyperplasia, pyometra and adenocarcinoma [1,6]. The basic ... Leitner M, Aurich JE, Galabova G, Aurich C, Walter I. Lectin binding patterns in normal canine endometrium and in bitches with pyometra and cystic endometrial hyperplasia...

Ngày tải lên: 07/08/2014, 18:21

... composition of forest stands being rather low, the study of the species and mainly of its root system has been paid little attention so far. Available data which are however of rather general character ... Mts. and in the region of Bohemian-Moravian Upland or in a mu- tual comparison between the two regions (see stand situation 5, mutual comparison of stand situa...

Ngày tải lên: 07/08/2014, 04:20

... taken separately (A) . e mixed stand sample was analyzed. e mixed sample was composed of three spots in each stand. Chemical analyses were done in the FGMRI labo- ratory. e amount of available ... Ekológia, 25: 289–297. MANUAL on Methods and Criteria for Harmonized Sam- pling, Assessment, Monitoring and Analysis of the Effects of Air Pollution on Forests. Part VI Sa...

Ngày tải lên: 07/08/2014, 10:21

... found that O. minus, O. piceae and O. piliferum were as- sociated with T. piniperda in pine stands near Warsaw. The pathogenicity of blue-stain fungi has been studied by fungal inoculation of large ... In ad- dition, the pathogenicity of several blue-stain fungi associated with T. piniperda was investigated by inoculating Scots pine seedlings. 2. MATERIALS AND METHODS 2.1. Study...

Ngày tải lên: 07/08/2014, 16:20

... including length of both tap and lat- eral roots, doubled from time of transplanting in April to first sampling in June in untreated controls and in seedlings in which whorl and lateral buds and ... taproot and lateral roots are scanned separately and that a resolution at 300 dpi with black and white background and threshold automatically gives the best correla-...

Ngày tải lên: 07/08/2014, 16:20

... was found in both treatments for height and diameter growth, total biomass and leaf and stem biomass, with Pinus pinea attaining the highest values, followed by P. canariensis, P. pinaster and P. ... Tecnolog a Agraria y Alimentaria (INIA), Apto 8111, 28080 Madrid, Spain (Received 27 February 2006; accepted 4 April 2006) Abstract – Seedlings of four populations each of Pinus pi...

Ngày tải lên: 07/08/2014, 16:20

... tested, using contrasts in association with a linear mixed model containing the following variables: stand, moisture treatment, the interaction between stand and moisture treatment, and the two random ... our data. 3. RESULTS 3.1. Leaf litterfall, mass of the forest floor and of the Ah horizon, and root abundance in the three stands Leaf litterfall was similar in the oa...

Ngày tải lên: 07/08/2014, 16:20