Báo cáo lâm nghiệp: "Investigations on vitality and genetic structure in oak stands" pps

... influences of decline on genetic structure of stands in the next generation. Preconditions for that are investigations con- cerning the state of damage of oak trees and the complete ... gene conservation and forest tree breeding, it is important to gain information about the genetic structure effect on the sensitivity to ’European oak...

Ngày tải lên: 08/08/2014, 18:21

... (P 3WA ,N 3W -Dec, P AC -Dec and D P1 ), strongly biased by rain events in Enguera and Tous at planting, showed poor and contradictory correla- tions with survival and growth. 4. DISCUSSION Both seedling and site ... stocklot quality that increased with time within the temporal and eco- regional context considered. In addition to this, the stocklot quality expression depended...

Ngày tải lên: 07/08/2014, 16:21

... evident that the functioning of the individual ecosystems must be understood in the context of their interactions. Nothing in the living environ- ment operates separately. e individual compo- nents ... cutting interventions have been accomplished: in 1989 and in 2004. e measured values were evaluated and processed using the Statistica software. RESULTS AND DISCUSSION e r...

Ngày tải lên: 07/08/2014, 03:22

... Sampling and Analysis of Deposition, 2006. UN/ECE Convention on Long-Range Transboundary Air Pollution, International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects ... e region of the Silesian Beskids is situated in the direction of prevailing winds from Třinec and Ostrava agglomeration with heavy industry concen- tration. Air pollution decrease...

Ngày tải lên: 07/08/2014, 10:21

... length and root tips Total root length, 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 ... the change in root:shoot during the growing season in A. nordmanniana and the possible signalling between root and shoot should be given more attention in future wo...

Ngày tải lên: 07/08/2014, 16:20

... one hand, the size and position of the tree in the diame- ter distribution (dand BAL), and the structure of the stand (D g , s d /(D g + 0.01) and G), on the other hand. Variables PPinea and QSuber ... regression models for wind and snow damage in northern Finland based on the National Forest Inventory data, For. Ecol. Manage. 135 (2000) 315–330. [22] Linder P., Jonsson P....

Ngày tải lên: 07/08/2014, 16:21

... variation and jack pine introgression on disease and insect resistance in lodgepole pine, Can. J. For. Res. 26 (1996) 711–726. [40] Wu H.X, Ying C.C., Genetic parameters and selection efficiencies in ... subzone), MS (from 0.24 in very dry subzone to 0.62 in dry subzone), IDF (from 0.16 in dry subzone to 2.02 in the wet subzone), and ESSF (from 0.09 in dry subzone to...

Ngày tải lên: 08/08/2014, 00:21

... drift, strong and directional selection toward genetic uniformity in a limited number of environments, inbreeding depression and/ or other factors. We investigated genetic variation in Berchemia ... based on Conkle et al. [2], 20 enzyme systems were surveyed in a preliminary test, and ten enzyme systems showing consistent and clear banding patterns were finally chosen: aspa...

Ngày tải lên: 08/08/2014, 01:21

... measurements on standing trees using a device developed by INRA and described in [16]. Data were first submitted to analysis of variance including prog- eny (random) and block (fixed) as main effects using ... eas- ily and thousands of hybrids have been produced across Europe in open-pollinated conditions and by controlled crossing. * Corresponding author: paques@orleans.inra.f...

Ngày tải lên: 08/08/2014, 01:22

... succession may occur routinely in other eastern oak and pine forests con- taining an understory dominated by later successional species (see Discussion in Abrams and Scott, ... competi- tion from non -oak species and the predation of seeds and seedlings, such as through the increased use of fire and controlling deer populations, a major l...

Ngày tải lên: 08/08/2014, 18:21