Báo cáo lâm nghiệp: "Short-term effects of fire on plant cover and soil conditions in two Austrocedrus chilensis (cypress) forests in Patagonia, Argentina" potx

... 63–71 © INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2005098 Original article Short-term effects of fire on plant cover and soil conditions in two Austrocedrus chilensis (cypress) forests in Patagonia, ... changes in understory and overstory, and in the patterns of soil temperature and moisture in burned cypress forests of Patagonia. Onc...

Ngày tải lên: 08/08/2014, 00:22

... signifi- cantly and the lack of sustainable silvicultural treatments and thinnings has lead to dense coppice forests. In such conditions the growth of saplings is low and shoots often wither during the ... 756–775. [19] Montes F., Cañellas I., Río M.d., Montero G., The effects of silvi- culture on the structure of Scots pine stands in Spain, in: Procee- dings of To...

Ngày tải lên: 08/08/2014, 01:22

... handling disrupt the functional continuity between soil and roots, and cause root injuries with loss of fine roots, resulting in reduced water and nutrient absorption [21]. Lifting and transplanting ... limitation could be indirectly generated later in the growing season if the growth unbalance generated Table II. Effects of lifting and time on changes in content an...

Ngày tải lên: 08/08/2014, 01:22

... temperature of about 24°C and in the conditions of a long day (15 hours). Estimation of the effect of sub-sterilizing doses on F1 generation was done indirectly, by: (A) evaluation of basic parameters: ... problems concerning the rearing of irradiated individuals, the rearing was done in large numbers of individuals and each dose was carried out in five replicati...

Ngày tải lên: 07/08/2014, 03:22

... DISCUSSION Confirmation of flooding and P. alni infection effects on black alder e analysis of covariance confirmed that the both factors (flooding and P. alni infection) and their combination significantly ... non-flooded and non-inoculated plants (control group); F-P+ treatment: non-flooded, inoculated plants; F+P- treatment: flooded, non-inoculated plants; F+P+ treatment: floode...

Ngày tải lên: 07/08/2014, 10:21

... on the amount of beech seedlings (principal woody plant) in natural regeneration. A significant in u- ence of two principal climatic variables (moisture and light conditions) on the growth and ... group consisting of beech and willow. e results of ANOVA in Table 3 indicate a signifi - cant in uence of different cutting operations on the number of all regenera...

Ngày tải lên: 07/08/2014, 10:22

... carbon isotope composition. 1. INTRODUCTION Application of fertiliser often increases the growth of Pinus pinaster Ait. and other conifers [24, 38]. The mass and area of foliage increases following ... against any lasting role of A max in the growth response. Concentrations of N, P, and K were maintained within a relatively small range, and there was no correlation betwee...

Ngày tải lên: 08/08/2014, 00:21

... limited and waterlogged conditions [9, 27]. Photosynthesis would also be inhibited due to the increased participation of competing pathways and consumption of electrons and reductant in non- photosynthetic ... (Picea sitchensis) seedlings under exposed and shaded conditions was evaluated to provide a physiological understanding of the factors controlling seedling performan...

Ngày tải lên: 08/08/2014, 00:22

... Eric- sson and Ingestad [17] in birch seedlings. Conversely, under low light, RGR was independent of plant P concentration (Fig. 3). RGR did not increase with increasing plant P and no relationship ... Marcelis L.F.M., Harbinson J., Lambers H., Contrasting effects of N and P deprivation on the regulation of photosynthesis in tomato plants in relation to feed- back li...

Ngày tải lên: 08/08/2014, 00:22

... fire- prone environments based on its combi- nation of eliminating auto-allelopathy and non-inhibition of germination by fire factors. On the other hand, from the meth- odological point of view, ... the germination rate increases most are Ash Dilution (increase of 28%), Control (increase of 27%) and Smoke–5 min (increase of 24%). In the treatments Smoke–10 min and S...

Ngày tải lên: 08/08/2014, 00:22