Báo cáo lâm nghiệp: " Factors modulating superoxide dismutase activity in needles of spruce trees (Picea abies L )" doc

... activity of SOD was analyz- ed in 4 subsequent generations of needles of healthy trees and compared with the activity in needles of injured trees with 50% loss of needles. In ... needles. In needles from healthy trees, SOD ac- tivity was highest in the youngest needles and then declined by about 25% in 4 yr old needles. I...

Ngày tải lên: 09/08/2014, 04:20

... blunt cutting edge does not cut the material in the process of chip cutting. It is mainly in the plain passing the lowest point of the cutting edge but it is also in the plain lying a little bit ... conditions in the process of woodcutting by circular saws According to the shape of a circular saw in the crosswise cut we can recognize the following circular saws: flat, re...

Ngày tải lên: 07/08/2014, 03:22

... number of alleles (from 9 to 76 alleles per locus). The total number of alleles scored in 930 individuals over all loci was 253. It was possible to detect 33 unique alleles, i.e. present only in ... geographical localisation. 3.2. Allelic diversity of microsatellite loci The total number of alleles at each locus and the size ranges of the PCR products corresponding to these alle...

Ngày tải lên: 07/08/2014, 16:20

... obtained were cell number, cell diameter, lumen diameter, and single cell wall thick- ness. Intra-ring position was calculated relative to the cell number, so that the first cell of a radial cell ... when dividing a tree ring into E and L zones, the aim of this method will be to classify cells in a radial cell file which contains multiple E and L zones into only one earlywood and on...

Ngày tải lên: 08/08/2014, 00:22

... long) MPL: hair length on the midrib LPL: hair length on the lamina Calculated variables PRL: relative length of the petiole, PL / (LL+PL) (%) LRW: relative width of the lamina, LW / LL (%) LWRL: ... variables Dimensional characters PL: petiole length (A-B, cm) LL: lamina length (B-D, cm) PERI: lamina perimeter (cm) AREA: lamina surface area (cm 2 ) LW: maximal lamina width (E-F, cm) LWL:...

Ngày tải lên: 08/08/2014, 01:22

... Oechel, eds), Springer-Verlag, Berlin, 27-53 Schreiber U, Schliwa U, Bilger W (1986) Continuous recording of photochemical and non-photochemical chlorophyll fluorescence quenching ... quenching of chlorophyll fluorescence. Biochem Biophys Acta 990, 87-92 Giersch C, Krause GH (1991) A simple model relating photoinhibitory fluorescence quenching in chloro-...

Ngày tải lên: 08/08/2014, 18:21

... France : l iuus licile *petisis Mill. (RAPP. 1967) et /’i l1 us pi l1 ea L. Dans les deux espèces, le maximum absolu de la chute des aiguilles se situe en juillet et plus des ... 7872492). Summary Dislribulion and cycling of organic /11 al ler in a Pinus pinea L. stand The distribution and turnover of organic matter has been studied in...

Ngày tải lên: 09/08/2014, 06:21

... research plot at the beginning of the experiment, i.e. 200 plants in total. Samples of 46 plants were randomly extracted from all research plots on May 9, 2006. Samples were cleaned of soil and ... the volume of major parts of 4 years old wild cherry trees. An allometric analysis of different parts of plants in relation to the growth performance of wild cherry trees...

Ngày tải lên: 07/08/2014, 03:22

... Iran 2 Department of Soil Science, College of Agriculture, e University of Guilan, Rasht, Iran 3 Department of Forestry, Faculty of Agriculture, University of Ilam, Ilam, Iran ABSTRACT: In forest harvesting ... physical proper- ties of lower coastal plain forest soil. Soil Science Society of America Journal, 47: 595–598. HATCHELL G.E., RALSTON C.W., FOIL R.R., 1988. Site p...

Ngày tải lên: 07/08/2014, 03:22

... registered in the Douglas fir stand again, visibly lower in the pine and spruce stands on the agricultural lands and the lowest on the old forest soil. In the mineral horizons, the arable soil showed ... permanently forested localities as well as with arable soil. MATERIAL AND METHODS Experimental plots were established in the ter- ritory of the Training Forest Enterprise, clo...

Ngày tải lên: 07/08/2014, 03:22