Báo cáo lâm nghiệp: " Differential effects of N, P and K on photosynthesis and partitioning of N in Pinus pinaster needles" pptx

... continuing fertiliser inputs [12]. Figure 4. Relationship between stable carbon isotope composition (δ 13 C) and (a) needle N concentration, (b) needle P concentration, (c) needle K concentration, ... rates of photosynthesis due to fertiliser explain only 10% of the increase of net photosynthesis within the canopy [31]. Increases in leaf area and changes in biomass pa...

Ngày tải lên: 08/08/2014, 00:21

... element concentration with position in the trunk, and to the presence of two particular points : a minimum of concentration values at two meters from the ground and an inflexion ... an inflexion point in the upper part of the trunk due to changes in bark concentration. Apart from considering the mean profiles, individual variations hav...

Ngày tải lên: 09/08/2014, 02:20

... growth unbalance generated Table II. Effects of lifting and time on changes in content and partitioning of total, old and new elements (C and N) in the various components of intact or lifted one-year-old ... decrease in N content of whole seedlings and of old roots (Fig. 4 and Tab. II). In contrast, lifting had no effect on N content of needles an...

Ngày tải lên: 08/08/2014, 01:22

... flooding and non-flooding condition was Table 1. e effect of long-term flooding and Phytophthora alni infection on the development of black alder saplings Treatment per valid N Length of necrosis ... effects (flooding and Phytophthora alni inoculation). e height of the plants at the begin- ning of the experiment was found to be an important independent factor potentially...

Ngày tải lên: 07/08/2014, 10:21

... proportionally with increasing cutting intensity. e ANOVA results document a significant in uence of cutting intensity on the abundance of both one-year-old and older seedlings. e abundance of ... this in uence was found positive on plot M only. Fig. 5 illustrates the in uence of cutting on changes in the species composition of natural regeneration in comparison w...

Ngày tải lên: 07/08/2014, 10:22

... reductions in both stomatal (G s ) and mesophyll conductance (G m ), and an increase in the proportion of electrons consumed in non-photosynthetic pathways. After re-watering, photosynthesis of plants ... Photosynthesis would also be inhibited due to the increased participation of competing pathways and consumption of electrons and reductant in non- photosynthetic...

Ngày tải lên: 08/08/2014, 00:22

... London. [37] Mengel K. , Kirkby E.A., Principles of plant nutrition, International Potash Institute Worblaufen, Bern, 1987. [38] Minotta G., Pinzauti S., Effects of light and soil fertility on growth, leaf ... increased sharply with increasing plant P concentration at LP and IP, and the slope of the linear relationship between plant P concentration and RGR, i.e., phosph...

Ngày tải lên: 08/08/2014, 00:22

... Retana J., Effect of site quality and thinning manage- ment on the structure of holm oak forests in northeast Spain, Ann. Sci. For. 53 (1996) 571–584. [14] Kuuluvainen T., Penttinen A., Leinonen ... development and acorn produc- tion and can help seedlings to establish [20]. The response of the remaining trees to thinning depends on species characteristics such as crown an...

Ngày tải lên: 08/08/2014, 01:22

... dif- ferent plant components and increased organic solute concentrations. However, elevated CO 2 concentrations often lead to reduced total mineral ion concentrations in the plant ... different plant components was assessed in relation to the whole plant CO 2 exchange and ii) the relationships between alterations in carbon allocation and in osmo...

Ngày tải lên: 08/08/2014, 18:21

... planted individually in open-ended paper containers, 5 cm square and 20 cm tall, using a potting mix containing peat moss, fir bark and vermiculite. They were then placed ... The plot layout contained four blocks. Within each block were ten rows of nine seedlings each. Each row contained one randomly positioned seedling from each of the ni...

Ngày tải lên: 08/08/2014, 18:21