Báo cáo lâm nghiệp:"Wind-firmness in Pinus pinaster Aït stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged during the 1999 storm" pdf

... for Maritime pine stands at the stand scale and at the tree scale, within this general framework. 4.1. Vulnerability to wind at the stand scale 4.1.1. Stand density and the damping stand effect Thinning ... pinaster Aït. stands in Southwest France: influence of stand density, fertilisation and breeding in two experimental stands damaged...

Ngày tải lên: 08/08/2014, 01:21

... studies in pine since, although incomplete, the partial BAC library has led to the isolation of a clone contain- ing a geneof interest. In consequence, it could be used to assist pine genome mapping ... well as shearing, and the avoidance of contamination with polysac- charides and phenolic compounds. It would be of interest to construct a Pinus pinaster BAC library si...

Ngày tải lên: 07/08/2014, 16:21

... percentage of trees in SSC3. The percentage in the SSC1 decreased when the stand density increased, with a values of 48.2% in the low density, 26.6% in middle density and 9.1% in the highest. In the ... references in the literature to stem straightness in young and mature stands are scarce [38, 39]. On the other hand, there are few studies that fo...

Ngày tải lên: 08/08/2014, 01:22

... 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

... 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 ... be indicative of increased partitioning of carbon into sucrose (starch decreases) and this situa- tion is obviously continued during summer. Class li-specific...

Ngày tải lên: 09/08/2014, 04:20

... Education, Youth and Sports of the Czech Republic, Project No. 2B06068, and the Research Intention of ISBE AS CR, Project No. AV0Z60870520. In uence of stand density, thinning and elevated CO 2 ... age of 10–12 years in autumn 1996. Sampling procedure: In 2002, the first schematic thinning (intensity of 27%) was carried out. After the two years, the next...

Ngày tải lên: 07/08/2014, 03:22

... for the damage levels observed. To complete our under- standing of the effect of damage and consequently our under- standing of the effect of late frosts we need to carry out the same kind of “cohort ... arms of the fork) originating from the same point. The forks observed in this study were those which emerged on the annual shoot of the principal axis of e...

Ngày tải lên: 07/08/2014, 16:20

... Variations among trees and stands There exist significant differences among the 9 stands and among trees in each stand. The grouping of trees or stand is not always the same depending on the chosen colour ... 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 ex...

Ngày tải lên: 08/08/2014, 00:22

... fertiliser often increases the growth of Pinus pinaster Ait. and other conifers [24, 38]. The mass and area of foliage increases following fertiliser application, and this par- tially explains the growth ... [55]. Together these findings cast doubt on whether photosynthesis plays a general and/ or lasting role in the response of growth to fertiliser addition. The...

Ngày tải lên: 08/08/2014, 00:21

... develop site index models for even-aged stands of Pinus pinaster in two ecoregions of Galicia (northwestern Spain). Data from 204 stem analyses were obtained and a data structure involving all possible ... site index models for Pinus pinaster 125 The values of the parameters of the model are consistent with the empirical evidence that for the same site index,...

Ngày tải lên: 08/08/2014, 00:21