Báo cáo lâm nghiệp: "2 CO response curves can be a measured with field-portable closed-loop photosynthesis system" doc

... LI-6200. At low chamber C0 2 mole fractions, a large C0 2 gradient exits between chamber air and ambient air exaggerating chamber leaks that are normally small. Leaks cause an ... intensity discharge lamps. A plexiglas filter, along with an external fan and water-cooled CO 2 response curves can be measured with a field-portable closed-l...

Ngày tải lên: 09/08/2014, 04:20

... observed in aerial biomass accumulation. Net C0 2 assimilation rate per unit leaf area is not always related to biomass production and other factors may be more important (Gif- ford ... dif- ferent rates of growth and to compare them with those of P. tamarugo and P. juliflora at different temperatures. Materials and Methods C0 2 assimilation rate...

Ngày tải lên: 09/08/2014, 04:20

... models can also pre- dict in a robust way and as reliably as other approaches, stand structure (density, basal area and diameter distribution) and are mathematically more tractable than individual-based ... 48 subplots according to the proportion of remaining basal area (basal area after logging/original basal area before logging in %). The average remaining basal area of all the plots be...

Ngày tải lên: 08/08/2014, 01:21

... slight dam- age to lateral buds, 2 severe damage to lateral buds but no damage to the apical bud, and 3 as damage to both lateral and apical buds. Eighth- year volume was not significantly correlated ... damage at Summit (p = 0.38) but was negatively correlated with frost damage at Marcola (r = –0.69, p < 0.0002). 2.5. Analysis Data were separated into two distinct data bases prior to a...

Ngày tải lên: 08/08/2014, 00:22

... class – mean annual increment at age 100 (m 3 /ha) breast height diameter of tree with mean basal area (dg cm), number of trees (N/ha), basal area (G m 2 /ha), volume (V m 3 /ha) and the proportion ... moister stands also reflects the species’ ecologi- cal demands in site conditions. Acer campestre L., Acer platanoides L. and Acer pseudoplatanus L., the native maple species in Austria, h...

Ngày tải lên: 07/08/2014, 03:22

... nut and the plate. Cables transmit measured signals of the force and torque Table 1. Basic parameters of circular saws Basic dimensions Saw diameter D (mm) Saw width B (mm) Cutting- clearance ... of circular saws with unsuitable technical and technological parameters in the given conditions of work can be expressed by following deficiencies: fast circular saw wearing and bad qu...

Ngày tải lên: 07/08/2014, 03:22

... efficiency are increased, but at the same time maintaining the natural balance of forest by not en- dangering the soil, plant and animal life. On this basis, with the disappearance of traditional harvesting ... Caspian Sea in a narrow strip which has special ecological and topographical conditions and also has exclusive plant species diversity. In recent years the demand for wood has in...

Ngày tải lên: 07/08/2014, 03:22

... northern areas of Iran are known as Hyrcanian Forests and are distributed across three provinces, namely Gilan, Maznadarn and Golestan. These provinces are situated in the north of Iran near the Caspian ... known as the Northern Forests or Hyr- canian Forests and are distributed across three provinces: Golestan, Mazandaran, and Gilan.  e majority of these forests are located in Mazandara...

Ngày tải lên: 07/08/2014, 10:21

... could be obtained by a large-scale analysis, for example on the national level. R ef ere nce s ĎURSKÝ J., ŠKVARENINA J., MINĎÁŠ J., MIKOVÁ A. , 2006. Regional analysis of climate change impact ... ha of forested area in the West Beskidians Mts., and is actually af- fected by the mass dieback of prevailing secondary unnatural spruce forests due to biotic pests, mainly bark beetles (S...

Ngày tải lên: 07/08/2014, 10:21

... stand due to a thicker humus layer. In mineral soil 0–40 cm, the amount of available Ca was double under spruce, as compared to beech. Also, the concentration of Ca, as measured in soil water ... and Game Management Research Institute, Strnady, Czech Republic ABSTRACT: Concentrations of air pollutants measured by passive samplers, atmospheric deposition to forest eco- systems, soil w...

Ngày tải lên: 07/08/2014, 10:21