Báo cáo lâm nghiệp: "Latitudinal and altitudinal variation of bud burst in western populations of sessile oak" docx

... Latitudinal and altitudinal variations of bud burst in western populations of sessile oak (Quer- cus petraea (Matt) Liebl) are examined. The phenology of bud burst in 50 populations ... Original article Latitudinal and altitudinal variation of bud burst in western populations of sessile oak (Quercus petraea (Matt) Liebl) A ....

Ngày tải lên: 08/08/2014, 18:21

... negative in uence on the pulping quality increas- ing chemical consumption in pulping and bleaching, decreas- ing pulp yield and pulp brightness, and increasing process costs [20]. For the pulp and ... INTRODUCTION The wood of Eucalyptus globulus Labill. is an important source of papermaking fibres in the pulp industry, combining first quality pulp and paper properties with t...

Ngày tải lên: 07/08/2014, 16:21

... differ- ences of 2 ºC in sun leaves in the warm season. Table I. Average values and standard deviations of the Fv/Fm para- meter in response to freezing temperatures in sun and shade leaves of Laurus ... assessment of frost damage in upper crown leaves (sun leaves) and inner crown leaves (shade leaves) during warm and cold seasons in Laurus azorica, Persea indica...

Ngày tải lên: 08/08/2014, 00:22

... assessment of peeling and browsing intensity was carried out in two categories including individu- als with dbh from 7 cm to 11.9 cm and individuals with dbh from 12 cm to 20 cm. Individuals ... processed aimed at summarizing the damage (browsing, peeling) and at expressing both types of damage together. As average values from the preceding maps of browsing and peeling we...

Ngày tải lên: 07/08/2014, 03:22

... F horizons) in the spruce stand on the former arable soil and then in the Douglas fir one, lower in the pine stand and especially lower in the older stand on forest land. In the mineral soil, ... performed in the stands of four tree species on afforested agricul- tural lands, in a neighbouring forest stand on con- tinuously forested land (mixed Scots pine – Norway spruc...

Ngày tải lên: 07/08/2014, 03:22

... seedlings growing in the open area, higher values in the gap and the highest values in seedlings growing under shelterwood, ex- plained these diff erences by increased photoinhibi- tion in beeches ... observed in seedlings from both the 4 th and the 7 th FAZ during the whole growing season (Fig. 2). Higher maximum values of ETR in unshaded seedlings of various tree s...

Ngày tải lên: 07/08/2014, 10:21

... stands) and spruce stands, relict pine woods and stands in the ecotone of the upper forest limit in diff erent site, stand, air-pollution and eco- logical conditions were examined.  e main ... of higher ratio of silver fi r in the forest stand.  e complex diversity of the stand was in the fi rst year of measurement very high, but shows slight de- crease during follow...

Ngày tải lên: 07/08/2014, 10:21

... catchments of the Czech Republic. In: Proceedings of the International Confe- rence on Interdisciplinary Approaches in Small Catchment Hydrology: Monitoring and Research. Demänovská dolina, September ... nitrogen, a component of amino acids, proteins and enzymes.  e natural bal- ance of nitrogen and sulphur cycling in forest eco- systems has been disturbed by increased...

Ngày tải lên: 07/08/2014, 10:21

... individuals of N. bicarinatus emerged, and infestation varied between 3.2 and 11.3%. In spring 2004, 45 adults emerged and in- festation varied within the range of 2.8–3.5%. In Fig. 2. N. bicarinatus ... emerged in total 89 in- dividuals of the ichneumon wasps N. bicarinatus. e infestation in spring 2003 varied based on in- dividual study areas within the range...

Ngày tải lên: 07/08/2014, 10:21

... found in our study. In Spain and Portugal, F et al. (2004) indicate March–April as the most com- mon farrowing period and Santos gives the be- ginning of March to the end of April. In southern ... including head and legs, or (iii) the weight of a dressed individual without head and legs. Age was determined in all animals. In indi- viduals up to the age of 2 y...

Ngày tải lên: 07/08/2014, 10:21