Báo cáo lâm nghiệp: "phytotoxic solutions on the respiration of mycorrhizal and non-mycorrhizal spruce roots (Picea abies L Karst ) Effect of" pot

... Effect of phytotoxic solutions on the respiration of mycorrhizal and non -mycorrhizal spruce roots (Picea abies L. Karst. ) F. Pellissier L. Trosset Biopedology Laboratory, ... when mycorrhizal and non -mycorrhizal roots were placed in the presence of a plant extract or humus solu- tion. Materials and Methods Plant extracts The...

Ngày tải lên: 09/08/2014, 04:20

... epidemiological laws, the causal nature of a relationship was particularly well demonstrated when the emergence of a phenomenon was increased by increasing the level of the risk factor [10]. Finally, ... less long lived forks) are largely influenced by annual height growth and would only become important in open plantations above a threshold annual elongation rate (AER) of 50...

Ngày tải lên: 07/08/2014, 16:20

... probably had multi-scale in- fluence from local climatic conditions as well as the variation and complexity of terrestrial and oceanic climate. In general, many acknowledged oscillatory modes of ... variables (especially pollution) and that the en- vironmental pollution of Shenyang can weaken the response of Chinese pine tree ring width to local climatic variables. Chi- nes...

Ngày tải lên: 07/08/2014, 16:21

... feeding and then lay eggs for the third time. Under the same conditions Melolontha melolontha L. fe- males lay the eggs deeper in the soil than those of M. hippocastani. e development of the eggs ... grub development in the second half of 2006 (Table 1). e plantation in the region was established us- ing two methods; full-area soil preparation and ploughing...

Ngày tải lên: 07/08/2014, 03:22

... diversity of biotopes, high concentration of pheasants, feed- ing supply – form of feed) on the diversity of the community of small terrestrial mammals and on the abundance and viability of their ... only marginal predators of small terrestrial mammals (B et al. 1959; H, Š 200 5), and under conditions of this country only domestic fowl can...

Ngày tải lên: 07/08/2014, 03:22

... defines the implemen- tation of all-round policies directed towards the conservation and sustainable development of the region to improve the quality of life, strengthen local economies and communities ... play an important role not only in forest utilization, renewal and preservation, but also in the general development of a region, its recreational potential, i...

Ngày tải lên: 07/08/2014, 03:22

... Parallam PSL, Intrallam LSL, Microllam LVL and TJI beams. ese products combine properties of wood, also making it possible to use valuable natural resources more economically (B et al. ... thickness of the sample, and the distance of supports are measured, and deflection at loading and maximal faulted load- ing are determined. Modulus of elasticity is calculated fro...

Ngày tải lên: 07/08/2014, 04:20

... detail, at the cell level. To verify this hypothesis, the objective of our research was to analyse the impact of external factors on the formation and development of phlo- em cells. Further, the ... eventually mature into xylem cells. Phloem mother cells are produced on the phloem side of the cam- bium, and these divide only once to form a pair of cells (...

Ngày tải lên: 07/08/2014, 10:21

... ect the level of experimental crop yield. Be- sides, neither the content of easily available mineral forms of N nor the total quantities of the N fraction derived from the soil in the crop and ... old. Soil samples were collected in mid-March from the surface mineral portion of the soil layer, from a depth of 0–20 cm. During the sample collection, remnants...

Ngày tải lên: 07/08/2014, 10:21

... the abrasion of the test specimen and filling of the sanding paper with abraded material are checked. e frequency of the sanding paper replacement is Table 1. e initial and final point of ... plywoods. Fig. 3 illustrates the initial and final points of abrasion in samples without glass fibres. Fig. 4 illustrates the initial and final points of abrasion in sam...

Ngày tải lên: 07/08/2014, 10:21