Báo cáo lâm nghiệp:" The key-role of topsoil moisture on CO2 efflux from a Mediterranean Quercus ilex forest" docx

... to study the temporal changes in CO 2 efflux in response to soil water availability and temperature. Several data are available on the respiration of Mediterra- nean ecosystems. Most of them were ... respiration of 5.7% and an increase of ecosystem respiration of 8.6%. For nonlimiting soil water conditions, at RWC = 1, the increases of respiration caused by a 1 °C te...

Ngày tải lên: 08/08/2014, 01:21

... geometry and mainly the beech species with and without false heart on cutting input. MATERIAL AND METHODS The main aim of the verification experimental investigation was to study, on the basis of ... technological parameters v c and v f , and on the tool angular geometry of a milling machine in the process of plain milling. Another goal of the experimen...

Ngày tải lên: 07/08/2014, 03:22

... proportion of Picea abies (CCA score on the horizontal axis equal to the only one environmental variable – proportion of Picea abies; covariables – altitude, slope; logarithmic data transformation) Relevé ... Relation between the proportion of Picea abies and other variables including EIV (CCA with the proportion of Picea abies as the only environmental variable and alti...

Ngày tải lên: 07/08/2014, 10:21

... CC Fagus a c Abies b Tilia Quercus Carpinus Acer a a a a a a a a a a a a a a a a a a a a b b bb b b b Treatment Fagus Abies Tilia Quercus Carpinus Acer Count (individuals/m 2 ) J. FOR. SCI., 54, 2008 ... values of determination coefficient (r 2 ) represent the contribution to the total variance (the measure in what a change in one variable causes a change...

Ngày tải lên: 07/08/2014, 10:22

... seedlings, a marked and parallel decline in both C0 2 assimila- tion and stomatal conductance occurred from day 0 to day 9 after transplanting (Fig. 1a and b); afterwards the ... A t- for the transplanted plants was accompa- nied by an almost constant ci (Fig. 2), thus indicating that, despite the parallel evolu- tion of A and gs, th...

Ngày tải lên: 09/08/2014, 04:20

... at each irradiance level. A non-rectangular hyper- variation in photosynthetic capacity, whe- reas coefficients of determination >90% are typical for broadleaved trees. The ... of measurement. The air temperature was 20°C, external C0 2 concentration was 340 ppm and vapor pressure deficit 5-10 mbar in the chamber. The horizon- tal photon irr...

Ngày tải lên: 09/08/2014, 04:20

... tested on motion and than released to rearing cages. ey mated and established new generation. e breeding was con- ducted in natural temperature and light conditions to have adults at the end of ... former management practices rather than by natu- ral factors (E 1986). As a result of social and economy development, there appeared vast re- gions of non-native monocult...

Ngày tải lên: 07/08/2014, 03:22

... release to the start of prepara- tion of entry holes was almost the same for both irradiated and non-irradiated males. In spite of the fact, that the irradiated males walked a sig- nificantly longer ... irradiated males reached a lower reproductive rate than the control males. n ȱ=ȱ5 a a a a a a a a a a a a a a a 0 2 4 6 8 10 12 14 16 Galleries Matingȱcha...

Ngày tải lên: 07/08/2014, 03:22

... Rhododendrons etc. (K, K 1999). Paradoxically, in agar media it grows best if there is manifest attenuation and acidification as a result of hydrolysis of the agar. Overall, the degree of hydroly- sis ... hydroly- sis of agar and the characteristics of the media after sterilization in an autoclave cannot be anticipated. Microbiologists state directly that agar m...

Ngày tải lên: 07/08/2014, 03:22

... (P et al. 2004). It is to suppose that the aerial application of surface liming may be one of the causes of imbalances in the availability of the studied bases. It mainly a ected natural processes ... avail- able potassium and mobile aluminium. e relation- ship of Al to univalent base cations is antagonistic. e risk of a negative effect of Al becomes higher...

Ngày tải lên: 07/08/2014, 03:22