Báo cáo lâm nghiệp: "Roles of European and Japanese larch in the genetic control of growth, architecture and wood quality traits in interspecific hybrids (Larix × eurolepis Henry)" pot

... eccentricity of the stem that prevented the symmetric cutting of the two boards. The two boards of (a) and the southern board of (c) are examples of “non-red heart” (NRH); whereas the two boards of (b) and ... corresponds to the bottom log of one of the 87 trees tested, with the black mark giving the mean and the half-length of the bar the sta...

Ngày tải lên: 08/08/2014, 00:22

... ranking the highest in adults and the lowest in the overwintering larvae. The SCP has proved to be a reliable index to estimate the cold hardiness of the beetle M. alternatus. The mean SCP of the ... factor in determining the northern limit of the insect distribution. In our study, we observed that the lowest SCP for the overwintering larvae was –24 ◦ C...

Ngày tải lên: 07/08/2014, 16:20

... article Roles of European and Japanese larch in the genetic control of growth, architecture and wood quality traits in interspecific hybrids (Larix × eurolepis Henry) Luc E. PÂQUES* INRA, Unité ... – The respective roles of European and Japanese larch species in the genetic control of traits in interspecific hybrids...

Ngày tải lên: 08/08/2014, 01:22

... environment, their feeding behaviour and the damage they cause. At the beginning of the research, we conducted a survey among foresters in the form of a questionnaire with the aim to find out how they ... mammals and the incompleteness of knowledge of their ecology and feeding behaviour have lead us to initiation of an extensive research focused on monitorin...

Ngày tải lên: 07/08/2014, 03:22

... we applied the D m of 5 mm. The scaling factor α is defined as the ratio of the square of root diameter before bifurcation ( ) to the sum of squares of the diameters of bifur- cating roots ... there is a need to investigate the global relevance of these concepts when applied to other spe- cies. The objective of our contribution is to research the ways of...

Ngày tải lên: 08/08/2014, 01:21

... evidence that the rate of starch synthesis is controlled by the rates of sucrose formation and trans- port. Metabolites involved in the regulation of carbon partitioning between ... differ significantly in the levels of starch, TP and F26BP, in that class II needles show a decrease in starch, compared to in- creased amounts of TP...

Ngày tải lên: 09/08/2014, 04:20

... with the moist peat-sand substrate and incu- bated as described above (control) . In treatments 6 to 9 the mc of beechnuts was in- creased by sprinkling them with tap water to ob- tain the target ... determine the speed of germination. It was cal- culated according to the modified formula: MGT = ∑(n i × t i ) × n –1 total where n i is the number of seeds g...

Ngày tải lên: 07/08/2014, 10:21

... also the intensity of the effect of significant climatic fac- tors on the increment of trees of the studied tree species. Figs. 5 and 6 illustrate changes of incre- ment indexes in percent in dependence ... mainly in June and July. An increase in precipitation by 1 mm when compared with the long-term average results in an increase in increment index of s...

Ngày tải lên: 07/08/2014, 10:21

... – the radius of a circle to the beginning of early wood, R – the radius of a circle to the beginning of late wood, P – earlywood area in annual ring. Total area of early wood rings within the ... sapwood area, referring to the area of early wood within the sapwood zone. In the opinion of these authors such a calculated conducting area is a very go...

Ngày tải lên: 07/08/2014, 10:21

... results of the analysis of the relationship between the stem form of larch of the tested prov- enances and the index of stand density, obtained dur- ing this study, were not expected. Although there ... comprehensive hypotheses on the observed regularities in variation of the stem form of the studied larch partial populations. e authors of the pr...

Ngày tải lên: 07/08/2014, 10:22