Báo cáo lâm nghiệp: " Effect of species and ecological conditions on ellagitannin content in oak wood from an even-aged and mixed stand of Quercus robur L and Quercus petraea Liebl " docx

... concentration of ellagitannins in the 286 trees samplings investigated. Several analytical in- dexes, like total ellagitannin content and content of major el- lagitannins (vescalagin, castalagin, grandinin ... 2006) Abstract – Species effects and ecological conditions on ten heartwood ellagitannins (vescalin, castalin, roburins A-E, grandinin, vescalagin and casta-...

Ngày tải lên: 08/08/2014, 00:22

... than that of oak stands [1, 17], and as a consequence, less light is available for oak in mixed stands than in pure oak stands. Thus, beech is more competitive than oak, above as well as belowground ... increment in pure and mixed stands. Growth of oaks in mixed stands with beech 461 The effects of stand density (Rdi o ak + beech), species com- position (mix...

Ngày tải lên: 07/08/2014, 16:20

... Hazel improves soil quality of sloping oak stands in a German low mountain range, Ann. For. Sci. 62 (2005) 23–29. [31] Paavolainen L. , Kitunen V., Smolander A., Inhibition of nitrification in soil ... observe an effect of tree species on organic mat- ter biodegradability and consequently on mineral element and major nutriments release and availability. The results...

Ngày tải lên: 07/08/2014, 16:20

... – all leaves necrotised or shed.  e overall condition of plants was also considered during the evaluation of uredial counts on leaves.  e evaluation was done on sev- eral dates (from July ... infection re- mained stable in the tested set of clones during the trial.  e intensity of infection during the growing sea- son in 2005 and 2007 was evaluated in the same way...

Ngày tải lên: 07/08/2014, 10:21

... each combination of plot and month. Annual leaf biomass was calculated by summing monthly leaffall. To quantify the phenological pattern of leaffall and the corre- sponding phenological structure of ... precipitation during the growing season (May-October). We also examined whether strong winds resulted in early leaffall by regress- ing relative monthly leaffall (the ratio of monthl...

Ngày tải lên: 07/08/2014, 16:20

... gravels and stones includ- ing clasts of quartzite. These strata typically contain one or more red argic horizons with a silty to sandy texture in the surface hori- zon and a sandier layer below ... B., Schnabel S., Rainfall interception by holm oaks in Mediterranean open woodland, in: Garcia-Ruiz J.M., Jones J.A.A., Arnaez J. (Eds.), Environmental change and water sustainability...

Ngày tải lên: 07/08/2014, 16:21

... the amount of leached boron along the leaching procedure by using In- ductively Coupled Plasma analysis (ICP) of leachates, leached and unleached samples. Analyses of boron amount remaining before and after ... solution containing 20 g of glucose, 1.5 g of peptone, 7.5 g of malt extract and 1 000 mL of distilled water. After inoculating glass jars with fungal cultures a...

Ngày tải lên: 07/08/2014, 16:21

... N., Gilboa N., Nir I., Perevolotsky A., Nitsan Z., Effect of daily supplementation of polyethylene glycol on intake and di- gestion of tannin-containing leaves (Quercus calliprinos, Pistacia lentiscus ... grinding and analyzing. Condensed tannins in evergreen and deciduous Quercus 441 Tabl e I. Results of ANOVA analysis for the effects of light, water and species o...

Ngày tải lên: 07/08/2014, 16:21

... achieving homogeneous environmental conditions within blocks so that blocking can re- move the within-trial environmental variation by using blocks as a source of variation in an analysis of ... whether blocking can effi ciently handle this variation. MATERIALS AND METHODS  e study is based on the analysis of the Slovak trial plot of the international European beech (Fa- g...

Ngày tải lên: 07/08/2014, 10:21

... populations on their host tree depends, on the level of the insect popu- lations and the ability of pioneer individuals to attract con- geners, on the levels of tree natural defense mechanisms and the ... nutritional quality of plants, positively by increasing the level of foliar nitrogen which may, in turn, stimulate insect feeding [60,97], or negatively through low lea...

Ngày tải lên: 07/08/2014, 16:20