Báo cáo lâm nghiệp: "Soil detritivore macro-invertebrate assemblages throughout a managed beech rotation" docx

... co-inertia analysis was then run on the CA of faunal data and the PCA of environmental variables to (i) isolate new axes in both multidimensional spaces and (ii) create a factorial plane which ... climate is temperate oceanic with a mean annual temperature of +10 ◦ Cand a mean annual precipitation of 800 mm [19]. All stands were located on a plateau with more than 80 cm of loess as pa...

Ngày tải lên: 07/08/2014, 16:20

... machinery passes and average amount of logs being carried at each pass, the carrying potential of each skidding trail can be estimated. Hence the amount of logs that can be carried along a ... efficiency are increased, but at the same time maintaining the natural balance of forest by not en- dangering the soil, plant and animal life. On this basis, with the disappearance of traditional...

Ngày tải lên: 07/08/2014, 03:22

... total nitrogen content, pH in water, exchangeable acidity, exchangeable cations and anions (Mg, Ca, Mn, Al, S, Fe, B, P and K), cation exchange capacity and base saturation. No regular patterns ... physical and chemical soil properties, their vertical charac- teristics and quantitative variations, are presented for 36 broadleaved stands in East Norway. MATERIALS AND METHODS e study was...

Ngày tải lên: 07/08/2014, 03:22

... soil profi les applying the FAO WRB in- ternational classifi cation. Evaluation of underplanting damage  e degree of damage to underplantings was evaluated on each research plot, based on the ... when a negative correlation was calculated between the foliar N and P content and the degree of damage to evaluated underplantings caused by nutrient defi ciency (Tables 5 and 6). Damage to ......

Ngày tải lên: 07/08/2014, 10:21

... the Bytom Basin. In general, its climate can be characterized by an annual average air tem- perature of 8°C and annual average precipitation of 700 mm. e deposits are genetically related to the ... number of samples; *significant at the 0.05 probability level cast mine were abandoned and natural succession was allowed to take place. The age of reclaimed research plots was calculated start...

Ngày tải lên: 07/08/2014, 10:22

... 4.57 ab 3.88 abc 27.02 a 24.81 a 51.83 a 51.82 a SM F2 4.17 ab 3.57 ab 27.78 a 44.94 bc 72.72 ab 38.28 ab SM H 3.76 ab 3.03 ab 12.4 a 46.87 ab 59.27 ab 21.02 ab SM Ah 3.56 ab 2.98 ab 2.68 a 15.48 ... standard analytical methods, yearly tested. Table 1. Accumulation of surface humus and amount of fixed macronutrients in particular stands Stand Horizon Dry mass (kg/ha) N P K Ca M...

Ngày tải lên: 07/08/2014, 10:22

... moisture treatment under oak could be an artefact asso- ciated with the large spatial variability and with the fact that FFR was obtained by difference (TSR-MSR). Since TSR was not significantly a ected ... the main varying factor. The beech and the mixed stands are located side by side while the oak plot is 600 m away from them. Soil homogeneity was evaluated on the basis of a detailed ch...

Ngày tải lên: 07/08/2014, 16:20

... -0.87 and -0.94 MPa in a healthy and a damaged oak, respectively, at predawn, and -2.67 and -2.54 MPa in a healthy and a damaged oak, respectively, in the afternoon (gravita- tional ... leaves. Mean values were calculated for each branch. For com- parison of healthy and damaged oaks, a mean value, from the mean values of the respective br...

Ngày tải lên: 08/08/2014, 18:21

... forest area of Central Slovakia. Original digital data as well as enhanced digital images were used to estimate some forest variables. Image enhancement approaches employing topographic normalization, ... normalization, PCA analysis and differ- ent vegetation indices are a very important part of data processing. Apart from spectral characteristics, texture as an additional variable was uti...

Ngày tải lên: 07/08/2014, 03:22

... than class A1 and it starts al- ready with minimal diameter of logs 20 cm. Quality classes C1.1–C1.3 represent good quality, average quality and lower quality saw logs, and all have minimal ... evaluated part of stems. Damage to stems was evaluated according to ex- ternal visible signs. e most frequent were decays after mechanical damage to butts and buttresses, but in some localitie...

Ngày tải lên: 07/08/2014, 10:21