Báo cáo lâm nghiệp: "Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China" pps
Báo cáo lâm nghiệp: "Seasonal ionic exchange in two-layer canopies and total deposition in a subtropical evergreen mixed forest in central-south China" pps
... components, Chinese fir (Cunninghamia lanceolata) dominates the stand, and massoni- anapine(Pinus Massoniana) and camphor wood (Cinnamomum camphora) are frequent species; in addition, some bamboos (Phyl- lostachys ... 887 c INRA, EDP Sciences, 2006 DOI: 10.1051 /forest: 2006072 Original article Seasonal ionic exchange in two-layer canopies and total deposition in a...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Seasonal fluctuation in germination of short and longterm stored Norway spruce" ppsx
... collection A = 500–1,500 m) on GE and GC was tested by two-way analysis of covariance ANCOVA with interaction. Independent factors were T and M, covariate A and interaction T × M. Monthly fluctuation ... one time to a value characterising the annual average using formula (3). Re ferences BALDWIN H.I., 1935. Seasonal variations in the germination of red spruce. American Jour...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "The effect of point application of fertilizers on the soil environment of spread line windrows in the Krušné hory Mts" docx
... (hereinafter C-HS) was determined spectrophotometrically ac- cording to characteristic absorbances in pyrophos- phate. Carbon contained in humic acids (hereinafter C-HA) and carbon contained in ... easily available to plants. Unexchangeable K is de- fined by 3 fractions (K bound in the crystal lattice of silicates, fixed into clay minerals and organic K) that are hardly availab...
Ngày tải lên: 07/08/2014, 03:22
Báo cáo lâm nghiệp: "Nutrition of silver fir (Abies alba Mill) growing at the upper limit of its occurrence in the Šumava National Park and Protected Landscape Area" pot
... mean value measured in the sampled locality in Germa- ny was 63 mg·kg –1 ; for the localities in Poland and Slovakia it was 30 and 39 mg·kg –1 , respectively. e average value measured in ... 2006 and 2007 in the Bohemian Forest, in the mature stands growing predominantly above 1,100 m a. s.l. MATERIAL AND METHODS Samples of silver fir needles were taken in the B...
Ngày tải lên: 07/08/2014, 10:21
Báo cáo lâm nghiệp: "Variation of the tree form factor and taper in European larch of Polish provenances tested under conditions of the Beskid Sądecki mountain range (southern Poland)" docx
... differences in the rate of height and diameter growth. e effect of dbh and height on variation of stem tapering was eliminated by computing the relative tapering (equation 4). In this case the range ... out in the comparative experimen- tal area established in Krynica (the Beskid Sądecki mountain range, southern Poland) and supervised by the Department of Forest Tree Breed...
Ngày tải lên: 07/08/2014, 10:22
Báo cáo lâm nghiệp: "Extended length rotation to integrate timber and pine nut production with the conservation of structural diversity in a Pinus pinea (L.) forest" pdf
... pairs of samples u a and u a + d which distance from each other is within the distance lag cen- tred at d ,andz(u a )andz(u a +d) are the values that the variable z takes at samplesu a and u a + ... to calculate the most likely of the four rot risk classes as a function, for each fixed basal area, of the age and the dominant height of the stand, obtaining for each value of...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Successful under-planting of red oak and black cherry in early-successional deciduous shelterwoods of North America" ppsx
... Sandy loam; pH 5.15 Sandy loam; pH 5.87 Composition B. populifolia, O. virginiana B. populifolia, O. virginiana, and U. americana F. americana, C. caroliniana High shrub density and U. americana Basal ... of Amer- ican foresters in promoting the establishment of advanced natural regeneration prior to harvesting in fire adapted oak stands [21], and in the boreal forest as an alter...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Radial variation of wood density components and ring width in cork oak trees" pptx
... oak (Quercus suber L.) occupies large areas around the western Mediterranean basin in Southern Europe and North Africa, over a total area of about 2 million ha, mainly in Portugal (725 000 ha) ... (on average 0.10 g cm −3 , Tab. II) and constant radially. 3.5. Analysis of variation of ring and density components An analysis of variance was made on the ring and density componen...
Ngày tải lên: 07/08/2014, 16:20
Báo cáo lâm nghiệp: "Productivity of Pinus elliottii, P. caribaea and their F1 and F2 hybrids to 15 years in Queensland, Australia" ppsx
... hybrid pine in Queensland 693 2.2. Data collection All surviving trees were measured at approximately 10 and 15 years after planting in each of the three trials for diameter outside- bark at breast ... summed, and then divided by the plot area and the ex- act age at the time of measurement, to obtain an estimate of the mean annual increment (MAI, in m 3 ha −1 y −1 ). To examine th...
Ngày tải lên: 07/08/2014, 16:21
Báo cáo lâm nghiệp: "Effect of stand segmentation on growth and development of Norway spruce stands" pps
... if available; diameter increment also increases but only to a certain extent. After exceeding an optimal tree spacing no further increment continues. e statement that the skidding track has ... Segmentation of tended stands (by skidding tracks or slope roads) enables also their accessibility, makes skidding easier when using machinery, enhances resistance against abiotic factors an...
Ngày tải lên: 07/08/2014, 03:22