Báo cáo lâm nghiệp:"The relationship between vegetation management and the wood and pulping properties of a Eucalyptus hybrid clone" pdf

... sub-tropical, with a mean annual rainfall and temperature of 1144 mm and 22 °C respectively. The trial was located at an elevation of 45 m on an east facing slope. Soil parent material is of aeolian ... important indicator of pulpwood quality. 3.7. The use of Canonical Variate Analysis to compare the properties between groups of variates Canonical Variate Analysis...

Ngày tải lên: 08/08/2014, 01:21

... watershed situated at the summit part of the Orlické hory Mts., East Bohemia (Š et al. 2005; Č 2006). e watershed has a drainage area of 32.6 ha with land-surface elevation ranging ... 1. RESULTS AND DISCUSSION A comparison of both measured and approximated hydrographs (duration of event 44 hrs) shows the Table 1. Approximated hydrographs by the dura...

Ngày tải lên: 07/08/2014, 10:21

... zygotic) are able to limit hybridization in poplars, the extent and differences between natural and anthro- pogenic hybridization, and if current approaches to evaluate the threat of hybridization are ... and easiness of vegetative propagation) have led to widespread production of cultivated poplar plantations mainly in Europe, North-America and China. The use of hy...

Ngày tải lên: 08/08/2014, 00:22

... intercalary CMA bands (pairs 1, 4, 7 and 8), 2 with only centromeric bands (pairs 11 and 12) and 3 pairs (2, 5 and 10) having both intercalary and centro- meric bands (Figs. 1 ( 2a) and 2B). In karyotype ... intercalar bands on short arm (pairs 2, 7, and 8), chromosome pairs with centromeric and intercalar bands on long arm (pairs 5, 9 and 12) and chromosome pairs with ce...

Ngày tải lên: 08/08/2014, 00:22

... on the basis of C130 are available, as well as their variability. At the tree scale, it was more complicated to compare the height of the undamaged and the windthrown trees due to the fact that ... occurred farther to the south, and the maximal wind speeds at Cap-Ferret once again reached 173 km h –1 at a height of 30 m, and 144 km h –1 at 10 m at the weather...

Ngày tải lên: 08/08/2014, 01:21

... fact that they are associated with high standard deviations and according to the results of variance and covariance analysis, the differences between families are not statistically significant. So, ... to the complex nature of this trait. In temperate softwood, the average ring density is fundamentally dependent on the earlywood and latewood proportion and the relati...

Ngày tải lên: 08/08/2014, 01:21

... radiation; problem No 2: spatial variation of radiation (affected by stand height and structure, or seasons); problem No 3: time variation of radiation (daily, seasonal and ... measurements of many individual plants or parts of plants. In these cases " ;the expense of the logging and ana- lysis data and the problems of security and...

Ngày tải lên: 08/08/2014, 18:21

... on the other hand, the calculated apparent Ps are similar to those measured in isolated cuticles (McFarlane and Berry, 1974; Reed and Tukey, 1982). These rates suggest a different ... polyuronic acids of the polysaccharides in the secon- dary cuticle. These polar groups and polar pores are likely to contribute greatly to the ion exchange...

Ngày tải lên: 09/08/2014, 04:20

... a laboratory from the research area. The samples of litter mass were taken from 0.5 m 2 area by collecting all the litter mass in that area. Rut depths were measured in the same points of ... soil samples, a wooden rod was laid across the rut and the distance from the ground surface to the underside of the rod was measured between the holes for the pro...

Ngày tải lên: 07/08/2014, 03:22

... of: (i) an active ac- cumulation of secondary metabolites around attack zones, that limits the progression of the aggressor; and (ii) the build-up of a wound periderm that isolates the reaction ... carbon around the points of attack [7]. Synthesis of secondary metabolites is a very costly process in terms of en- ergy and depends on the availability of carboh...

Ngày tải lên: 07/08/2014, 16:21