Báo cáo lâm nghiệp: "The effects of summer exposure to ozone on the frost hardiness after the vegetation period of Norway and Sitka spruce seedlings" doc

... been exposed to ozone. For the Sitka spruce, there was no effect of pollutant exposure on the timing of frost hardiness attained by the shoots but, compared to the Norway shoots ... assumed dead). The shoots + vials were then autoclaved and the total conductivity (C-) of the solution determined. Based on the assumption tha...

Ngày tải lên: 09/08/2014, 04:20

... is the proportion of photons partitioned to PSII and I o is the incident irradiance. The proportion of electrons that are dissipated through processes other than photosynthetic carboxylation of ... compensa- tion point in the absence of mitochondrial respiration and R d is mito- chondrial respiration in the light. The values for Γ* for Sitka spruce were taken f...

Ngày tải lên: 08/08/2014, 00:22

... the responses of conifer growth to N, P and K fertiliser share a mechanistic basis in their effects on photo- synthesis and Rubisco concentration. Most studies relating N, P and K nutrition to ... δ 13 C, stable carbon isotope composition. 1. INTRODUCTION Application of fertiliser often increases the growth of Pinus pinaster Ait. and other conifers [24, 38]. The ma...

Ngày tải lên: 08/08/2014, 00:21

... 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 limitation, J. Exp. Bot. 54 (2003) ... vertical and horizontal bar indi- cates the standard error of the mean. Effects of phosphorus and light on early growth of maritime pine 577 density (PPFD) at...

Ngày tải lên: 08/08/2014, 00:22

... Karnosky D.F. & Bormann F.H. (1986) Effects of ambient ozone on the produc- tivity of Populus tremuloides Michx. grown under field conditions. Can. J. For. Res. 16, 47- 55

Ngày tải lên: 09/08/2014, 04:20

... 31.7) susceptibility of the trees. The lack of symptoms of damage on roots of trees in non-infested stands indicate, together with the extensive root growth of declining trees in these stands, that root ... 52]. The exception was the concentration of P and the ratio between P and N, which were somewhat low in most trees. The low concentration of P in leaves,...

Ngày tải lên: 07/08/2014, 16:20

... for quantifying the contribution of added variable(s) to the goodness of the models. In order to yield a proper interpretation of the data and to make the scales of the dependent and independent ... among the three variables were considered as well. The purpose of adding variables one by one to the models was to examine the accuracy of those model...

Ngày tải lên: 08/08/2014, 00:21

... 0.01). Conclusions: The population studied is exposed to high peak concentrations of formaldehyde with a long-term exposure. These two aspects, cumulatively, can be the cause of the observed genotoxic ... to FA environmentally and/ or occupationally [ 4]. According to the Inter- nat ional Infor mat ion System on Occupational Exposure to Carcinogens (CAREX), in the...

Ngày tải lên: 20/06/2014, 00:20

... reduces to 6.7% after dele- tion of the stem segments. After this closer look at the old pine, the effect of stratification and deletion of the stem segments on the precision of estimates is to be ... probability of 1. us, on the one hand, these seg- ments are measured in any case; on the other hand, it changes the structure of the crown and...

Ngày tải lên: 07/08/2014, 03:22

... (1988) mentions similar results in the increased consumption of food in the creation of a fat body in females of Lochmaea caprae (L.) Differences of imagoes in the consumption of food in particular ... Weevils of the genus Phyllobius – consumption of food on birch affected by differentiated inputs of nitrogen Fig. 7. e weight of the dry matter of birch leaves a...

Ngày tải lên: 07/08/2014, 10:21