Báo cáo lâm nghiệp: "The effect of different stand density on diameter growth response in Scots pine stands in relation to climate situations" potx

... were included in the clusters together with trees from unthinned control plots 1c. Variability of growth response of pine stands to climate characteristic in relation to thinning Variability of ... thinned stands (variant 4t) showed the higher variability of diameter growth response in comparison with those from control stands. DISCUSSION  e respon...

Ngày tải lên: 07/08/2014, 10:21

... result, there appears to be no relationship between thinning and compression strength parallel to grain according to mean values (Tab. IX). The effect of thinning treatments on bending properties, MOR ... related to variations in both rate of xylem increment along the entire bole and in its vertical distribution along the stem. As height growth is independent of stand...

Ngày tải lên: 07/08/2014, 16:21

... naturally into the ecosystem by the presence of N 2 -fixing shrubs [25]. P fertil- ization, used in maritime pine forests due to its positive effect on pine growth [7,24], may increase these natural inputs ... N 2 -fixation of Ulex species in the understory of Maritime pine stands (Pinus pinaster) and potential effect of P-fertilisation, Can. J. For. Res. 35 (2005) 1...

Ngày tải lên: 07/08/2014, 16:21

... expensive joins as would be required in a database implementation. Our long-term goal is to use this inverted index of dependencies as a versatile component of NLP systems in analogy to the increasingly ... author. 31 Proceedings of the COLING/ACL 2006 Main Conference Poster Sessions, pages 25–32, Sydney, July 2006. c 2006 Association for Computational Linguistics The Effect...

Ngày tải lên: 20/02/2014, 12:20

... Average density of Mesostigmata mites/m 2 found in experimental plots with stands non conversed (1, 3 and 7) and with stands during conversion (2, 4 and 8) Stands non conversed Average density ... stands non conversed (1, 3 and 7) and with stands during conversion (2, 4 and 8) Stands non conversed No. of species Stands during conversion No. of species Plot 1 22 plo...

Ngày tải lên: 07/08/2014, 03:22

... corresponding to the predisposing, incit- ing, and contributing stressing factors, respectively. Decline is induced by the sequential occurrence of one stressing factor from each ring, factors within ... (stressed/non stressed), often with extreme values in studies with potted plants. The in uence of stress intensity on plant response to infection may explain contrasting result...

Ngày tải lên: 07/08/2014, 16:20

... knowledge concerning controlled crossing in oak. Thanks to Lise Bach for expertise and help concerning isolation and storing of pollen. Further thanks goes to Ole Byrgesen, Kristian Stougaard Jakobsen ... is able to contribute to continued introgression between Q. petraea and Q. robur. Levels and significance of introgression will of course depend on the zygotic fitness of h...

Ngày tải lên: 07/08/2014, 16:20

... S., Osborne D.O., Guinto D., Carbon isotope discrimination and oxygen isotope composition in clones of the F1 hybrid between slash pine and Caribbean pine in relation to growth, water-use ef- ficiency ... natural selection constraints result in the exclusion of some combinations between transpi- rational fluxes and leaf structure or carbon concentrations. In- cluding these...

Ngày tải lên: 07/08/2014, 16:20

... function of elevation angle in (A) aspen, Jack pine and spruce stands and (B) red alder and Douglas-fir stands. Angular distribution of diffuse PAR 49 RLR sensor beneath aspen and Jack pine stands ... The photo- diode was glued onto the flat surface of a tubing of delrin rod which was then inserted into an aluminium tube. The photodiode was con- nected to a communicatio...

Ngày tải lên: 08/08/2014, 00:22

... was installed in the middle of the stand in June 1998. Wind speed components were measured with an Ultrasonic 3D anemometer (Solent R2, Gill Instruments, Lymington, UK) installed on the top of ... (0.4), an increase of 1 °C provokes an increase of soil respiration of 5.7% and an increase of ecosystem respiration of 8.6%. For nonlimiting soil water conditions, at RWC = 1,...

Ngày tải lên: 08/08/2014, 01:21