Báo cáo lâm nghiệp:"An examination of the interaction between climate, soil and leaf area index in a Quercus ilex ecosystem" ppt

... C. Hoff and S. Rambalfall and leaf quantity [33, 43]. Important then are the timing of rainfall and drought events, the quantity of rainfall, the storagecapacity of the soil and quantity and ... relations between the LAI and both climatic and soil factors; (2) understand how the water and carbon balancesbehave as a function of water availability and LAI; and (3)define how the balance ... and water use efficiency. This balancewas obtained at a leaf area index between 3 and 3.5. This inter-val is in agreement with the LAI of 3 observed at this site [29]. In summary, the LAI of...

Báo cáo lâm nghiệp: " An estimation of willingness to pay for asparagus (Asparagus racemosus Willd.) collectors in Makawanpur District, Nepal" ppsx

... Australia2Faculty of Education and ACSC, USQ, Toowoomba, Australia3Faculty of Business and ACSC, USQ, Toowoomba, AustraliaABSTRACT: e collection and sale of asparagus (Asparagus racemosus ... by managing the Department’s and the National Park’s forests, and giving legal permissions to collect asparagus from the National Park, which would have happened anyway at the ﬁnancial and ... escalating mainly due to increasing national and international demand and increasing market price, even though collection from the National Parks is legally prohibited. e overall analyses of...

Báo cáo lâm nghiệp: "An approach for the analysis of vegetation spectra using non-linear mixed modeling of truncated power spectra" pdf

... function. A program for the estimation of the parameters was written in MATHEMATICA® [61] since nomajor software package currently offers the Laplace approximation asan option. Final estimates ... treated statistically as repeated meas-urements or longitudinal data [63]. Longitudinal data are charac-terized by a within- and between- subject variance (covariance) of observations. In a modeling ... spectra is needed. In addition to minimizing problems of data mining and colin-earity, the approach should also reduce the dimensions of the data with a minimum of information loss. It must accomplishthis...

Báo cáo lâm nghiệp: "Speciﬁcation of the beechwood soil environment based on chosen soil properties, aiming at the Fageta paupera habitat" docx

... ese semi-natural European beech stands are situated in small-scale preserved areas, i.e. in the areas with a special statute of protection (S et al. 2004) as a part of Natura 2000 Net-work ... (heterogeneity of soils in FP and in BV) was realized in the same way but a diﬀ erent analysis was used. For the assessment of conﬁ dence intervals for each property in each horizon, data set has a small ... contrary to FP and BV.  e reason is a small size of FP and BV sets and slight invalida-tion of normality contrary to an optimal size of BF, when ANOVA can be used. Furthermore, the data are...

Báo cáo lâm nghiệp: "An analysis of ecophysiological responses to drought in American Chestnut" ppt

... Nagakura J., Shigenaga H., Akama A. , Takahashi M., Growth and transpiration of Japanese cedar (Cryptomeria japonica) and Hinokicypress (Chamaecyparis obtusa) seedlings in response to soil watercontent, ... biomass, leaf area rootratio = leaf area divided by root biomass. Each variable is the mean of ten plants ± standard error of the mean.Variables Well-watered Water-stressed p-value*Total biomass ... of leaf and stem biomass, leaf weight ratio = leaf biomass divided bytotal biomass, leaf weight root ratio = leaf biomass divided by root biomass, leaf area ratio = leaf area divided by total...

Báo cáo lâm nghiệp: " Genetic control of the time of transition from juvenile to mature wood in Pinus radiata D. Don" pdf

... Ability) and SCA (Speciﬁc Combining Ability) for radiata pine in Australia. De-tails of the Australia-Wide-Diallel program are given in Wu and Matheson [45]. Summary results on growth and form traits ... plots in 9 blocks planted in 1969at Flynn, Gippsland, Victoria (PT47) and harvested at age 31 y. Soilsat PT47 are characterised as sandy loam whereas at PT5042, they arecharacterized as sandy ... [12]. The standard errors of the estimated parameters were calculated fromvariance of ratios, using an approximation based on a Taylor seriesexpansion. The signiﬁcance of the variance component was...

Báo cáo lâm nghiệp: "Eﬀects of the clear-cutting of a Douglas-ﬁr plantation (Pseudotsuga menziesii F.) on the chemical composition of soil solutions and on the leaching of DOC and ions in drainage waters" pps

... indicates an interaction between spatial and temporal variability. The temporal vari-ability mainly consisted in seasonal cycles and in the eﬀect of clear-cutting (decrease in concentrations and ... treatment of dataAll ﬁeld and laboratory measurements and the model-generateddata used for budget calculations were administrated by an Accessdatabase (Microsoft) using VBA programming. Statistical ... explain this behaviour in reference to the workdone in another area [34].(ii) The changes of physical parameters the after clear-cuttinge.g. increase in soil temperature and moisture, and the rather...

Báo cáo lâm nghiệp: "Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots" doc

... sets of thermocouples and a thermopile. Axialwater flow in the root is calculated for 15-min averages by solving the heat balance equation for the portion of heat transported with massflow in axial ... explanation of a partialmismatch among root hydraulics, chemical and anatomicalproperties, and measured water absorption is the fact that addi-tional factors, which may control water flow into ... corresponding fluxrate Jv. The estimated Lp values of the three species rangedTable I. Water absorption rates and related dry mass and surface area of 4 to 5 oak, beech and spruce branch roots as...

Báo cáo lâm nghiệp: " An overview of ecology and silviculture of indigenous oaks in France" ppt

... of stomata plays a part in the predawn water potentials at-3.5 to 4.0 MPa, whereas in Q robur and Q petraea, transpiration control occurs ear-lier during a drought and ... because of the quality and value of their wood or because of their geographic extension, or both. Two of these species are widespread in the hills and plains of the Atlantic ... waterpotential and gas exchanges. They havebeen studied in oaks by various authors (eg,Aussenac and Valette, 1982; Scuiller, 1990;Acherar et al, 1991; Acherar and Rambal,1992;...

Báo cáo lâm nghiệp: "Eﬀect of Melampsora larici-populina on growth and biomass yield of eight clones of Populus nigra" ppsx

... traits.  is can probably be explained within the time frame these traits are mostly realised and within the time frame of the main incidence of the rust. Stem diameter and the main part of ... later dates, toward the end of the growing season, there was an extreme increase in the inoculum amount in the environ-ment and a signiﬁ cant increase in infection pressure, which caused a ... 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.  e ranking of clones according to rust inci-dence was also...

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