Báo cáo lâm nghiệp: "Temperate forest trees and stands under

Báo cáo lâm nghiệp: "Temperate forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences" ppt

... forest trees and stands under severe drought: a review of ecophysiological responses, adaptation processes and long-term consequences Nathalie B ´  a * ,RolandH  b , André G a ,ErwinD a a UMR ... daily data) and of relative extractable soil water (REW) in: (a) beech stands (Soroe, Hesse and Hainich), (b) coniferous stands (Thara...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "Cavitation in trees and the stems hydraulic sufficiency of woody" doc

... of a crown and at the end of a short hydraulic path or at the top of a crown and at the end of a long hydraulic path. All shoots are approxi- mately equally capable ... a branched catena, so no account was taken of the water storage capacity of leaves and stems or of the temporal dyna- mics of evaporation. This paper prese...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: " Natural forest regeneration in spruce monocultures in the Ukrainian Beskids – prognosis by FORKOME model" ppt

... light available for speciﬁc tree leaves and is calcu- lated according to the equation: Q(h) = Q max E –k×LA(h) where: LA(h) – (Leaf Area) – leaf area above height h, Q max – solar radiation measured ... that makes the seed amount rather a guesstimate. at is the main reason for a stochastic approach to the seed and sapling prob- lem in the model. Research was carried out and an...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Carbon partitioning: fructose 2,6-bisphosphate content as an indicator of specific changes in carbohydrate metabolism in needles from class II spruce trees" pot

... part of the Black Forest (Kalbele- scheuer and Haldenhof, near Freiburg, F.R.G.). Collection and freeze-drying of needle samples as well as metatrolite analyses were as ... opposite situation emerges with decreased amounts of F6P and F26BP and high levels of TP. This metabolic situation should thus be indicative of increased partitioning...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "The root-plant ratio changes in the first growing periods of wild cherry (Prunus avium L.) plantations" pptx

... performance of new plantation in the forest. e study summarises data on the volume of major parts of 4 years old wild cherry trees. An allometric analysis of diﬀerent parts of plants in relation ... Czech stand- ards to ﬁx up the necessary quantitative and quali- tative parameters for seedlings and plants planted out. However, until the last Czech standard came out (J...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst" docx

... Describing New Zealand Vegetation – Expanded Manual – Version 4. Landscape Research, Manaaki Whenua: 64. Available at http://nvs.landscareresearch.co.nz. Cited 20 August 2008. ISSS-ISRIC-FAO, 1998. ... Quecetalia pubes- centi-petraeae. Folia Geobotanica and Phytotaxonomica, 32: 221–258. CHYTRÝ M., 1998. Potential replacement vegetation: an approach to vegetation mapping of cultural...

Ngày tải lên : 07/08/2014, 10:22

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Báo cáo lâm nghiệp: "Studies on European beech (Fagus sylvatica L.). Part 1: Variations of wood colour parameters" pptx

... peripheral values are compared to all measured values. Additionnaly standard deviations are all increased (more than 60% for L* and about 75% for a* ) when comparing peripheral and all values. ... parameter. Tables III and IV give, for each of the 9 stands, the values of mean and standard deviation of the five colour parameters L*, a* , b*, C* and H*. Table III presents th...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "Variations clonales de l’aptitude du pin sylvestre à assurer le développement de Diprion pini L (Hym, Diprionidae) en milieu naturel" pdf

... natural climatic conditions, the lack of synchronization between reared insect and natural insect generations, the natural parasites and the distance between the lab and Cadouin. ... les larves étaient encore majori- tairement au troisième stade tandis que les clones favorables avaient plus de 30 % de survivants dont beaucoup au quatrième stad...

Ngày tải lên : 08/08/2014, 18:22

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Báo cáo lâm nghiệp: "Répartition de la sève brute entre les étudiée à l’aide d’un" docx

... quelle partie du système racinaire va l’alimenter. Ainsi nous ne pouvons pas, dans le cas du bouleau. séparer la surface de la cépée un secteurs indépendants. Nous constatons ... racines latérales ; J J I - lnjection dans une seule des racines latérales: IV - Injection dans 2 racines latérales contiguës ; V - Injection dans 2 racines latérales sépa...

Ngày tải lên : 09/08/2014, 06:21

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Báo cáo lâm nghiệp: "Optimisation des relations entre transpiration et photosynthèse. Observations à propos des méthodologies d’étude" pdf

... photosynthesis. Observations related to the methods of studies Cowani and Fnaputtna ( 1977) have proposed an optimization theory for the relations between transpiration and photosynthesis ... - based on an analysis of the datas in terms of demand and supply functions (fig. 2) - through which it is possible to determine the 3F&dquo;/(3g,...

Ngày tải lên : 09/08/2014, 06:21

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