Báo cáo lâm nghiệp: "Within-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water status and plant hydraulic constraints" ppt

... the compensation of toxic in uences of manganese and mainly of aluminium. e low content of potassium also indicates the insufficiency of water regimen both in soil and in individual spruce ... seedlings were planted in the soil from the decomposing stand and compared with both yellowing and green seedlings planted in the soil from the beech stand (Table 8). P...

Ngày tải lên: 07/08/2014, 03:22

... is now increasingly planted in Europe, both in afforestation of abandoned farmland and enrichment of forests [26]. In Gali- cia (NW Spain) a long term breeding program for this species was started in ... suspected, since the infection of this disease occurs through stomata in early spring. Bud burst explained some of the variation in leaf spot incidence (17–65% of t...

Ngày tải lên: 07/08/2014, 16:20

... 419–429 © INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2004035 Original article Within-crown variation in leaf conductance of Norway spruce: effects of irradiance, vapour pressure deficit, leaf water ... spruce depending on the level of irradiance and vapour pressure def- icit; (2) assess the contribution of the leaf water status and liquid phas...

Ngày tải lên: 08/08/2014, 01:21

... were planted in row plots, each containing four trees. One systematic thinning was carried out (by removing every second tree in a row) in 1995 at the Platon site and in 1996 at the Windsor and Saint-Ours ... density of individual and cumulated rings, minimum and maximum wood densities, ring width, and dry fiber weight of cumulated rings of poplar hybrids at the Saint-O...

Ngày tải lên: 07/08/2014, 16:20

... traits can be planted in different environments. Such information would benefit tree improvement programs of loblolly pine and the pulp and paper industry by allowing the selection and planting of suitable ... site, and blocks within site), γ is the vector of random-effects parameters including general com- bining ability (GCA) for female and male, specific combining ability (SC...

Ngày tải lên: 07/08/2014, 16:20

... significantly in uenced by any of the studied sources of variation. 4. DISCUSSION In spite of the difficulty in identifying ring boundaries and the resulting necessity in many cases of cross-examination with ... the innermost rings and increasing it in the outward rings. Until the beginning of cork extraction the accumulation of extractives should contribute to the hig...

Ngày tải lên: 07/08/2014, 16:20

... conifer- ous stands in the French Jura and in Switzerland [10, 39], in the Vosges Mountains [3, 4], in the French and Italian Alps [19, 22,43], in Belgium Ardenne [37], in Czech Repub- lic [44] and in Germany ... Abies alba in winter [24], high temperatures dur- ing the winter period could play a positive role in improving carbohydrate storage and growth of the fol...

Ngày tải lên: 07/08/2014, 16:21

... oscillating pattern of variation. In their study of families of radiata pine established in several sites in New Zealand, Cown and Ball [8] also measured average ring density and determined that ... continuous line representing F = 1.56, and P < 0.05. (A) ED and LD; (B) EA, LA and LP. Genetic variation within ring wood density 113 latewood), an increment in LD is...

Ngày tải lên: 08/08/2014, 00:21

... parasitaire 1. INTRODUCTION Plants usually show high genetic variation in plant suscep- tibility to insect pests [34]. This variation affects insect per- formance, insects commonly preferring plants ... R., Nutrition and growth in newly established plantations of Eucalyp- tus globulus in northwestern Spain, Ann. For. Sci. 60 (2003) 509– 517. [30] Namkoong G., Maintaining genet...

Ngày tải lên: 08/08/2014, 00:22

... metallurgical plants in Europe. On the other hand, the plantations sampled in the Krivorozhje region are located on mining dumps, dealing with thermal treatment of iron-ore and metal smelting (K 2 ), and ... Location of Black Pine natural stands and plantations exa- mined (see also Tab. I). 392 I.I. Korshikov et al. As a result of the analysis of 9 enzyme systems in the po...

Ngày tải lên: 08/08/2014, 01:21