Báo cáo lâm nghiệp: " Hazel improves soil quality of sloping oak stands in a German low mountain range" potx

... nutrition of woodlands growing on soils of low nutrient status [10]. To find out if hazel influences soil quality in sloping oak stands we determined several soil physical, chemical and microbial properties ... rubida (Sav.) in acidified soils, Water Air Soil Pollut. 28 (1986) 361–383. [9] Caravaca F., Lax A. , Albaladejo J., Organic matter, nutrient con- tents and...

Ngày tải lên: 08/08/2014, 00:21

... conditions after outplanting. Many data are available on reactions of seedlings grow- ing in the shade to a sudden increase in light access. Some characteristics change very rapidly, within hours ... traits of one-year seedlings of European beech originating from the 4 th FAZ grown in an unshaded (sun) and shaded (shade) plastic greenhouse (the number of evaluated plants...

Ngày tải lên: 07/08/2014, 10:21

... disturbances and malformations without pathological affec- tions have appeared in pines and particularly in 3 yr old pines (twisting of branches and leaders, abundant fascicle shoots, ... Technical communication no. 52, CAB, p. 306 Effect of phosphate fertilization on trace element nutrition of Pinus pinaster grown in a sandy acid soil E. Saur...

Ngày tải lên: 09/08/2014, 04:20

... only in one case in RB locality. e sex ratio was balanced in our case in HL and RB. It is characteristic feature of stable population liv- ing in optimal habitats (A , G 1985). In HL ... m 2 in size, and the mean amount of mast was determined. In all trial plots, the methodology of traditional line trapping was applied (P 1975). Snap traps were used...

Ngày tải lên: 07/08/2014, 03:22

... 370–376 In our case, the sex ratio was markedly in favour of females in HA and HL and balanced in RB. It is a characteristic feature of stable populations living in optimum habitats (N, ... 0.001, ANOVA, Scheffe test) were significant comparing RB and HA but insignificant comparing HA and HL. Comparing only adult individuals, statistical significance was found betwe...

Ngày tải lên: 07/08/2014, 03:22

... for all stands and dates together, and bacterial diversity after 2 years are given. Variability explained by the 1st axis of indirect analyses (mostly PCA), all canonical axes (mostly RDA) and ... were sampled and stored in a deep freezer until analysis. 2.3. Molecular analyses The surface layer, including mostly fungal mycelia and a small amount of degraded wood, was scraped from...

Ngày tải lên: 07/08/2014, 16:20

... by means of a two-way analysis of variance (ANOVA). In addition, treat- ment effects on whole-plant traits were further analysed within each species using a one-way ANOVA. Differences between treatments ... that higher water supplies ap- parently imposed to Q. ilex [10]. Regarding Q. faginea,thein- creased of C/N with watering was paralleled by [N] decline and by N pool increase, sh...

Ngày tải lên: 07/08/2014, 16:20

... living biomass of the Bel- gian productive forests was calculated for the year 2000. In a final analysis, the BEF s.l. category that introduces the largest variability in the calculation of the ... Working Group 1, evaluation and improvement of inventory/accounting systems of Carbon stock in Belgian forests 855 Sampling plots are circular and of 1000 m 2 each. The following...

Ngày tải lên: 08/08/2014, 00:22

... susceptible hosts are located within the shaded area (Jianghua Sun, 2004, unpublished data). 126 A. J. Carnegie et al. There are large areas of forests of P. massoniana in the south-east of China and of Larix ... (Hymenoptera: Siricidae) en la región Andino-patagónica argentina, Informe técnico de la temporada 1993–1994, Campo Forestal general San Martin, EEA, INTA Bariloche, Argen...

Ngày tải lên: 08/08/2014, 00:22

... of labeled methionine uptake indicated that the com- pound was rapidly taken up (within 30 min) and reached a plateau around 15 h in all shoot portions. Preliminary data concerning ... in small flasks equipped with a side-arm, into which filter paper soaked in KOH was inserted, and a center well containing either 0.1 I M mercuric acetate...

Ngày tải lên: 09/08/2014, 04:20