Báo cáo lâm nghiệp: "Forest vegetation management (FVM) is key to successful forest stand establishment around the world" doc

Ngày tải lên: 08/08/2014, 01:22

... by the motor during caracole and by the rotor in consequence of the revolution decrease. e torque of the rotor consists of the disc torque, shaft torque and cardan shaft torque. e other ... of the cutting edge from the plane of the disc (mm), R str – distance from the disc rotation axis to the half length of the cutting edge of the knife (mm). e technologica...

Ngày tải lên: 07/08/2014, 10:21

... point, it is possible that the maximum PPFD used in this experiment was insufficient to saturate its photosynthesis, possibly contributing to a lower energy excess in this species. By the same token, ... nitida.Itis also possible that the maximum PPFD used in this experiment (400 µmol.m −2 .s −1 )wasinsufficient to saturate photosynthe- sis of well-watered N. dombeyi, since this spe...

Ngày tải lên: 07/08/2014, 16:21

... that the direct impact of polluted air on the forest stands in the Kremnické vrchy Mts. is not getting weaker. On the other hand, the buffering capacity of soils in this area is good, and the ... the soil is fairly resistant to the changing acidity. e increasing ozone concentration is a serious risk factor in this sub-mountain area, in spite of the fact tha...

Ngày tải lên: 07/08/2014, 03:22

... living trees is caused by their high age (the breakdown stage). In the breakdown stage, there is a period with unsuitable ecological conditions for the establishment and growth of the subsequent ... that the trunk volume growth is most affected by the capacity of their assimilatory apparatus, in spite of the fact that they are both moderately shade-tolerant tree spe-...

Ngày tải lên: 07/08/2014, 10:22

... (2) to analyze the relationship between CO 2 flux from the soil and the quali- ties of soil organic carbon. This study promises to contribute to understanding of Japan-wide CO 2 emission from the ... contribute to the opposite trend to some extent. The quality of organic carbon is a crucial factor for deter- mining CO 2 emission from the soil. The ratio of cellulose...

Ngày tải lên: 07/08/2014, 16:20

... playing the role of contributory factors in the decline process, according to Manion’s terminology. However, in many cases, this proved to be difficult to demonstrate. An- other possible mechanism is ... could impact the epidemiology of pathogens through effects on other organisms within the community. This is particularly relevant for insect-vectored diseases such as bark beet...

Ngày tải lên: 07/08/2014, 16:20

... Cuba. Here they are abundant in the province of Pinar del Río, occu- pying the northern and southern plains which surround the Sierra de los Organos and the northern half of the Isla de la Juventud. The ... and the municipality of Isla de la Juventud (in southeastern Cuba). In this province, there is a total surface of 67 700 ha of P. tropicalis forest [1]. According to Pr...

Ngày tải lên: 08/08/2014, 00:22

... borders, at each end of it. This particular feature allows to limit the DNA transfer to the T-DNA, that is the name of the T-region once it has been inserted into the plant host genome. However, ... times. X-Gluc histochemistry [24] was used to follow the spatial expres- sion pattern of the uidA gene in the leaves and stems of plants grown Table II. Summary of the s...

Ngày tải lên: 08/08/2014, 01:21

... of the data set for the four other years limits the strength of year -to- year comparison, one should recognised that the difference observed between 1997 and 2001 was not fortuitous. Indeed, the ... pre-exponential factor, were almost similar and corresponds to a Q 10 value of 4.7–4.8 (Q 10 = e 10B ). This is a rather high value that is however within the range of publish...

Ngày tải lên: 08/08/2014, 01:22