Báo cáo lâm nghiệp: "Evolution of the mineral fertility of an acidic soil during a period of ten years in the Vosges mountains (France) Impact of humus mineralisation" pps

... 10.1051/forest:2005017 Original article Evolution of the mineral fertility of an acidic soil during a period of ten years in the Vosges mountains (France). Impact of humus mineralisation Maurice BONNEAU* INRA Centre ... K, the actual balance (soil analysis) was in the calculated interval, but, for Ca, there was a loss of 9.7 kg·ha –1 ins...

Ngày tải lên: 08/08/2014, 00:21

... R AYSON P., J ACKMAN M.E., 1958. Dark Island heath (Ninety Miles Plain, South Australia). VI. - Pyric succession : changes in composition, coverage, dry weight and mineral ... étudiée. La strate 3 n’apparaît réellement qu’à la fin de la première année après le feu, tandis que la strate 4 n’apparaît que vers la troisième année. Pour les tai...

Ngày tải lên: 09/08/2014, 06:21

... coordinates related to a longitudinal sawing plane, another plane parallel to the grain direction and perpendicular to the first one, and a series of cross-sections at an ... flexuositv in the stems of douglas fir. Three young douglas firs are studied. The boundaries of the successive annual rings are located in space by a syste...

Ngày tải lên: 09/08/2014, 06:21

... confirm the temporary dominance of yellow birch in succession and leads to believe in its decrease to the benefit of sugar maple to rebuild the original sugar maple stand ... d’atteindre leurs maximums d’efficacité de croissance après un délai d’un an, en 1980, tandis que le bouleau jaune connaît sa croissance maximale dès l’année du...

Ngày tải lên: 09/08/2014, 06:21

... atlantica, Corsican pine, Austrian pine after plnntntion in autumn and spring This study deals with the evolution of predawn water potential of cedar (Cedrus atlantica Manetti), ... Corsican pine (Pinus nigra Arn ssp. laricio poir. var. corsicana) and Austrian black pine (Pinus nigra ssp. nigricans Host) seedlings together with their root dev...

Ngày tải lên: 09/08/2014, 06:21

... highlights that tolerance to infection may be at least related to reduced sporulation ability of infecting fungus and to maintenance of a higher photosynthetic activity at a given ... decrease strongly. In a second step, approximatively at the time of leaf necrosis appearance, photosynthetic activity remains rather constant, even during f...

Ngày tải lên: 09/08/2014, 06:22

... observed the lowest mean and total leaf areas in seedlings of Mediterranean oaks (Fig. 3). The reduction in the mean area of individual leaves resulted in a non-linear increase in the total number of leaves ... per area (LMA) and leaf area ratio of the shoot (LAR shoot , leaf area divided by the dry mass of stems + branches + petioles + leaves); (4) leaf area...

Ngày tải lên: 07/08/2014, 16:20

... explain why they were not signifi- cantly related to storm damage. The chosen approach with a binary, instead of a ordinal, res- ponse has both an advantage and a disadvantage. The advantage is ... damage increased almost linearly with increasing stand height in stands taller than 20 m [5]. Stand height was also the most important variable explaining the occurrence of st...

Ngày tải lên: 08/08/2014, 00:21

... absence (0) of the species in the stand, BA: basal area of the stand, SOIL: binary variable (1: soils derived from basic volcanic and coarse granite parent materials, 0: others), TR: treatment response ... J., Domenach A. M., Leaf natural 15 N abundance and total N concen- tration as potential indicators of plant N nutrition in legumes and pioneer species in a rainfor...

Ngày tải lên: 08/08/2014, 00:22

... acetic acid (NAA) and benzylaminopurine (BAP) as growth regulators. The addition of elicitor as yeast extract to callus culture of Thuja plicata leads to an increase in the production of tropolones, ... Barton B.M., MacDonald B.F., The chemistry and utilisation of western Red Cedar, Canadian For. Ser. Pub. 1023 Ottawa, Canada, 1971. [5] Erdtman H., Gripenberg J., Antibiotic...

Ngày tải lên: 08/08/2014, 01:21