Báo cáo lâm nghiệp: "Opportunistic methods of controlling vegetation, inspired by natural plant succession dynamics with special reference to natural outmixing tendencies in a gap regeneration" pps

... 10.1051/forest:2004006 Original article Opportunistic methods of controlling vegetation, inspired by natural plant succession dynamics with special reference to natural outmixing tendencies in a gap regeneration Jean-Philippe ... observation trial in an area of natural regeneration under a canopy gap. This was created specifically for regenerat...

Ngày tải lên: 08/08/2014, 01:22

... using an ANOVA after angular transformation of the data. To evaluate the effect of the release treatment on the quantity of light available at the tree seedling level at site 3, fifth-year data ... that early gains from combining intensive management and planting large-diameter seedlings appeared to be additive for loblolly pine (Pinus taeda L.) [33]. The detrimental effect of co...

Ngày tải lên: 08/08/2014, 01:21

... ammonium assimilation is the glutamate synthase cycle. A combination of 15 N-labelling and enzymic specific inhibitors has been used to determine the pathway of ammonium assimilation ... representative of a range of forest types. In common with many herbaceous species, substantial activities of glutamate dehydrogenase are present, particularly...

Ngày tải lên: 09/08/2014, 04:20

... speed was corrected according to Sandoz [31]. 2.3. Statistical analysis The mean by ramet at each stage of sampling was submitted to a variance and a covariance analysis [30] according to the ... standing trees with an ultrasound method has the advantage of keeping the trees alive but leads to a loss in the gain of the selection. This method also has the advantage o...

Ngày tải lên: 08/08/2014, 01:22

... beginning of May and ended in mid-June with the peak at the end of May and beginning of June in 2005. In 2006, the flight activity started later in mid-May and lasted to the beginning of July ... species by means of the Malaise traps installed in several localities in 2005 and 2006, summarized data concerning occurrence of A. nebulosus in the Czech Republic,...

Ngày tải lên: 07/08/2014, 03:22

... in- dividuals were put into refrigerator into wet envi- ronment and later transported to lab. After several days, the number of individuals was enough high to establish artificial rearing. Laboratory ... Research Institute in Zvolen, Slovakia. Natural tree composition has been dramatically changed across Europe. Today, distributional rang- es of several tree species are mainly...

Ngày tải lên: 07/08/2014, 03:22

... irradiated males reached a lower reproductive rate than the control males. n ȱ=ȱ5 a a a a a a a a a a a a a a a 0 2 4 6 8 10 12 14 16 Galleries Matingȱchambersȱ Galleries with motherȱtunnel Galleries with larvaeȱtunnel Motherȱtunnels perȱgallery Abundanceȱperȱlog Control 15Gy 30Gy Fig. ... release to the start of prepara- tion of entry holes was almost the same for...

Ngày tải lên: 07/08/2014, 03:22

... IA is very abundant at those areas at all. Information about spatial distribution of bark beetles may suggest where to apply control measures against synergic attack of several bark beetles ... additional bark beetles attack were evalu- ated (usually those with only remains of needles). Each site was large enough (about 10–20 ha with variable elevation – see Table 1) allowin...

Ngày tải lên: 07/08/2014, 03:22

... trait measured was a height in 15 years of age. Data diagnostics All original datasets were tested for key departures from model assumptions with diagnostic tools avail- able in SAS software ... genetic gain in selected breeding populations. Com- pared to classical ANOVA based approach, general REML – BLUP is particularly useful in computing genetic parameters when datase...

Ngày tải lên: 07/08/2014, 03:22

... manipulation with hot viscid agar solution. 2. A sloping wet surface for plantlets may be easily created within a flask by means of shaking with the mixture of sand and a liquid medium. 3. Plantlets ... that after autoclaving agar in flasks was at various degrees of liquidity. is was apparently interrupted by hydrolysis. Methods for propagation were compared statis...

Ngày tải lên: 07/08/2014, 03:22