Báo cáo lâm nghiệp: "Contribution of different solutes to the cell osmotic pressure in tap and lateral roots of maritime pine seedlings: effects of a potassium deficiency and of an all-macronutrient deficienc" pptx

... ultrapure water as eluant. 2.4.3. Amino-acid analysis Extraction was carried out at 4 °C. 40 μL of an internal standard (α-butyric acid) were added to samples ... of primary leaves), of the tap root (TR) and of the three longest lateral roots (LR; as an assessment of the length of the lat- eral roots) of each...

Ngày tải lên: 09/08/2014, 04:20

... predation was estimated in the following way. Pre- dation was counted as ratio of bark damaged by birds and total bark area with galleries. e in u- ence of insects’ predation and parasitoids ... fraxini for all species. Percentage rates of total predation (together birds and insects), total parasitism and total mortality of bark beetles H. fraxini for single species...

Ngày tải lên: 07/08/2014, 03:22

... oak and black locust (HA), and the third was a pheasantry with a variable mixture of forest stands of various woody species and age with a permanent supply of food for pheasants and roe deer ... a difficult factor to consider in relation to the mammalian population regulation without taking into account its interactions with the behaviour and abundance o...

Ngày tải lên: 07/08/2014, 03:22

... m 2 and the average amount of mast was deter- mined. e plots were selected randomly in the oak stand and the number of acorns was determined on each of the plots. e acorns were then hulled and ... 370–376 responded by an increase in relative abundance in the next years 2004 and 2007. e peak of the popu- lation abundance was reached at the HA localit...

Ngày tải lên: 07/08/2014, 03:22

Ngày tải lên: 09/08/2014, 02:20

... and pathogen variability) Marie-Hélène Thibault * A. , Laboratoire de Pathologie I.N.R .A. , Laboratoire de Pathologie jorestiÍ!re Centre de Recherches foreslières cle Nancy Champetl OlI X, ... les caractères étudiés sont le plus souvent indépendants ; en particulier le caractère initial (croissance dans l’arbre) est indépendant de tous les caractères me...

Ngày tải lên: 09/08/2014, 06:21

... of the characteristics of the two populations. The fiability of terpenic characteristics as genetic markers leads to consider Anie and Neouvielle as two distinct taxa of ... mountain pine. The rc;latively low phenotypic variability of the westerner one (Anie) is probably due to its marginal position with regard to the Pyrenean ar...

Ngày tải lên: 09/08/2014, 06:21

... superficielles. La proportion de racines détruites semble indépendante de la profondeur, en revanche elle dépend de la distance à la souche, les racines étant d’autant plus attaquées ... déterminées ; il s’agit de trois Agaricales : - Collybia platyphylla Fr. ex Pers. était aisément reconnaissable aux rhizo- morphes cylindriques et blancs, attachés...

Ngày tải lên: 09/08/2014, 06:21

... Wilid. Multivariate analysis and the linear correlation of the characters allowed the discriminating taxonomic criteria to be distinguished. The variation in peduncle and petiole ... in the sympatric and allopatric populations of Berry (Central France). Nineteen characters, divided into a total of 82 classes, were measured on each tr...

Ngày tải lên: 09/08/2014, 06:22

... use can also he dealt with. This study also considcrs some mathematical models useful in the analysis :!f various production levels and height and diameter growth in Holly ... stations varie entre 1,9 m’/ha /an et 4,3 m’/ha /an avec une moyenne de 3 m‘/ha /an, pour le Chêne vert dans les aires échantillonnées. Le même tarif a été appl...

Ngày tải lên: 09/08/2014, 06:22