Báo cáo lâm nghiệp: "Changes in carbon uptake and allocation patterns in Quercus robur seedlings in response to elevated an 2 CO and water stress: C 13 labelling" pps

... to compensate for plant C uptake (+ 52% ). Plant N concentration and C/ N ratio over the 22 -week growing period Original article Changes in carbon uptake and allocation patterns in ... elevated [CO 2 ], by -11 and +13% , respectively (table III). Drought increased plant C and N concen- trations in both CO 2 treatments. Carbo...

Ngày tải lên: 08/08/2014, 18:21

... resis- tance to abiotic factors. Rincón et al. [45] showed that Rhi- zopogon spp. are efficient colonizers of Pinus pinea seedlings and significantly increase N and P concentrations of inocu- lated plants. ... relative abundances of species and edaphic factors. Factors that may contribute to the maintenance of ECM community structure are discussed. forest nursery / mycorrhiza / ITS-R...

Ngày tải lên: 07/08/2014, 16:20

... of correlation coefficient (R 2 = 0. 427 ) was inconclusive (P = 0.079). Correlation of mycorrhizae in mountain spruce stands and summer precipitation was not proved, contrary to very high correlation ... active and nonactive mycorrhizae (Figs. 2 and 3) can be con- nected with the changes in acidity as it was report- ed by V et al. (20 07). Chemical analyses of the soi...

Ngày tải lên: 07/08/2014, 03:22

... with our conclusion. e knowledge for high altitu- dinal lands needs to be achieved within time scale monitoring and the effects of climate and microor- ganism components through rising CO 2 fluxes. R ... soil organic carbon constitutes the uppermost carbon reserve and progressive warming will bring about the evolve- ment of soil and FF carbon through continuous decomposi...

Ngày tải lên: 07/08/2014, 03:22

... passive and continuous sampling, vertical and canopy profiles. In: Proceedings of the International Sym- posium on Passive Sampling of Gaseous Air Pollutants in Ecological Effects Research. e Scienti c ... significant, and they indicate that the stocking density does not play an important role in association with ozone affecting the stands. e increase in ozone concentrations...

Ngày tải lên: 07/08/2014, 03:22

... significant rise in SG and CWE was determined. e HPLC analyses indicated the presence of two cinnamic acid derivatives, p-coumaric and ferulic acids and of five benzoic acid derivatives (anisic, ... transferred into 100 ml Erlenmeyer flasks containing 50 ml of 12 g·l –1 Difco Maltose Extract and incubated at 24 C in an orbital incuba- tor (IOC.400.XX2 .C SANYO-Gallenkam...

Ngày tải lên: 07/08/2014, 10:21

... In 20 03, 20 06 and 20 07 the weak tribes of M. hipp- ocastani Fabr. and M. melolontha (L.) swarmed. In 20 03, 29 9 cockchafers were caught in the light trap, in 20 06 only 124 and in 20 07 72 cockchafers. ... In 20 04, 58 cockchafers were caught in the light trap, of which 86% were males; in 20 06 13 cockchafers, of which 100% were males; in 20 07 12...

Ngày tải lên: 07/08/2014, 10:21

... higher than 1.3 m and with dbh > 3 cm in the permanent square decreased from 44 (24 beeches, 12 firs, 5 sycamore maples, and 3 spruces) to 23 ( 12 beeches, 6 firs, 3 spruces, and 2 sycamore ... province of Ukraine (H, V 20 03). His research was aimed at the comprehension of complex relations between abiotic conditions and virgin forest types, changing in s...

Ngày tải lên: 07/08/2014, 10:22

... in 19 92 to be dangerous. The capacity of terrestrial ecosystems to act as carbon sinks could partly compensate for the increase in atmospheric CO 2 concentra- tions. Forest ecosystems only cover ... productive than grassland [11,18]. The need for an accurate inventory of carbon stocks and the capacity of forest to accumulate carbon was emphasised at the Helsinki (199...

Ngày tải lên: 08/08/2014, 00:22

... processes: i) verti- cal discrimination due to change in stom- atal conductance or carboxylation leading to changes in Ci /C a ratios; and ii) within- canopy gradients in ... (1987) Changes in aboveground structure and resistances to water uptake in Quer- cus coccifera along a rainfall gradient. In: Plant Response to Stress: Functi...

Ngày tải lên: 08/08/2014, 18:21