Báo cáo lâm nghiệp: "Effects of drainage treatment and stand growth on changes in runoff components from a forested watershed" pps

... Hydrotechnical meliorations. Drainage channels. Praha, ČSNI 1993. (in Czech) Drainage (1973): Principles and applications. Part II – eo- ries of drainage and watershed runoff. Wageningen, Interna- tional ... based on the expansion and shrinkage of variable source areas and consequent changes in a drainage network during a discharge event. e runoff investigation...

Ngày tải lên: 07/08/2014, 03:22

... based on high S0 2 inputs in the NE-Bavarian Mountains cause an imbalance in the nutrient supply of soils and plants, leading to cation leaching from damaged trees and ... (1983) Interactions of forest canopies with atmospheric constituents: S0 2, alkali and earth alkali cations and chloride. In: Effects of Accumulation of Air Pollutan...

Ngày tải lên: 09/08/2014, 04:20

... end of the growing season, in autumn, after the leaf fall (Fagus sylvatica) in 2004–2006. Particular samples were taken by a standard method using a metal frame of a known area (0.1 m 2 ). In ... horizon A h in all stands. As for total carbon, values range from 34.9% (beech stand) to 41.3% (spruce stand) , for humus layers L, F and H from 3.3% (spruce stand)...

Ngày tải lên: 07/08/2014, 10:21

... obtain mycorrhizal P. pinea seedlings produced in container. The high quantity of spores that can be obtained from one basidioma and the ease of application of this type of inoculum makes of ... Williams S., Official methods of analysis of the Association of Official Analytic Chemists, Sidney W. (Ed.), AOAC, Inc. Arling- ton VA, 1984. Nursery production of containerise...

Ngày tải lên: 08/08/2014, 00:22

... we are dealing with. 2. MATERIALS AND METHODS 2.1. Study area This study was carried out in the mountain known as Monte “Las Provincias”, belonging to the Junta de Andaluc a [Andalusian Regional ... and the annual trunk growth, and the only correlation shown is that of the rainfall values in the spring season, there is no correlation between the growth of the rings and the...

Ngày tải lên: 08/08/2014, 00:22

... 9B: Heathland and Related Shru- blands (RL Specht, ed), Elsevier, Amsterdam, 61-84 González-Rabanal F, Casal M (1995) Effect of high temperatures and ash on germination of ten ... (Fagus sylvatica) in secondary forests that can cover large areas (Elena-Roselló and Sánchez-Palomares, 1991; Catalán, 1991; Pausas and Fons, 1992). The economic impor...

Ngày tải lên: 08/08/2014, 18:21

... mean, sd – standard deviation, x – mark stands for p < 0.05 Table 5. Dry mass concentrations of macroelements in alder foliage and dry weight of 100 leaves Year Variant N (%) P (%) K (%) Ca ... classified as a suitable prepara- tory species even under the harsh environmental conditions of the 7 th and 8 th forest altitudinal zones. No growth stagnation as a result of...

Ngày tải lên: 07/08/2014, 04:20

... m. In each plot exposure (sexasegimal degrees), Figure 1. Walter-Lieth Climate Diagram and location map showing O a area and its position in the Iberian Peninsula. The shadow area in the map indicates ... studied in Pinus pinaster Ait. stands. To this effect, 32 plots encompassing different densities and sites of varying quality were laid out in mature stands. In a youn...

Ngày tải lên: 08/08/2014, 01:22

... between harvests, a variable harvest of basal area (40-60%), and special care in the selection of the remaining trees. These stands had a similar age from last thinning. The ... we have compared the differ- ent variables considered. In the areas of Arbúcies (table IV) and Gualba (table V), the plots of stands managed by conservative t...

Ngày tải lên: 08/08/2014, 18:21

... root hairs, a swollen appearance and the examination of hand-cross sections for the presence of Hartig net. The presence of intracellular hy- phae in stained sections, as well ... production and mycorrhizal associ- ations are related to alterations of photosynthesis and metabolism of plants, mediated by changes in stomatal aperture, carb...

Ngày tải lên: 08/08/2014, 18:21