Báo cáo lâm nghiệp: "Effect of leaf biomass and phenological structure of the canopy on plot growth in a deciduous hardwood forest in northern Japan" pot

... each combination of plot and month. Annual leaf biomass was calculated by summing monthly leaffall. To quantify the phenological pattern of leaffall and the corre- sponding phenological structure of the ... 2006) Abstract – We monitored leaf biomass, seasonal changes in leaffall, and plot growth for 11 years post-thinning in a secondary deciduous har...

Ngày tải lên: 07/08/2014, 16:20

... the degree of infection within the particular clones of black pop- lar in the years of observation, the relationship be- tween the severity of clone infection by rust and the value of the growth ... pathogen. On later dates, toward the end of the growing season, there was an extreme increase in the inoculum amount in the environ- ment and a...

Ngày tải lên: 07/08/2014, 10:21

... beech and pure oak stands. For oak, Fagacées describes the stand basal area increment as a function of dominant height, height increment of the dominant trees, and stand density. To allocate the ... selection thinnings, but on stand-related thinning regimes. This partly explains the linear relation of ∆g and DBH per treatment. The DBH-range of the stands availabl...

Ngày tải lên: 07/08/2014, 16:20

... variance. The F1 axis was determined on one hand, by the nitrate and water- extractable Ca, Mg, and Mn contents, and on the other hand, by the water-extractable Fe and Al contents. This axis tended to ... functions in various ways and at various rates, and particularly by the changes in carbon and nitrogen cycles. In forest soils, humification and weather-...

Ngày tải lên: 07/08/2014, 16:20

... leaf water potentials were compared each year by means of one way ANOVAs, with month as independent variable and water potential as dependent variable. The same analysis was applied per midday ... this variation, although small, can also explain the favourable water status of the trees studied. For in- stance, integrating θ variation in BA site in the first 3 m depth and...

Ngày tải lên: 07/08/2014, 16:21

... has an intermediate behaviour regarding drying and consequently regarding boron leaching. Except a small increase of retention for wood treated with a 1.0% boric acid solution, boron concentration ... retention agent. The impact of these combinations is evaluated for boron retention and biological resistance to ter- mites and decay fungi. 2. MATERIALS AND METHODS 2.1. Wood m...

Ngày tải lên: 07/08/2014, 16:21

... castalin, roburin A and C on the one hand and the percentage of vescala- gin and vescalagin/castalagin ratio on the other hand. The significance of these correlations is that the increase of the total ellagitannin ... vescalagin, castalagin, grandinin and roburin A- E content. The second axis explains 16.1% of the total variation and is related to casta...

Ngày tải lên: 08/08/2014, 00:22

... Recerca Ecològica i Aplicacions Forestals), Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain b Centre de Recerca Ecològica i Aplicacions Forestals (CREAF), Universitat Autònoma ... point of view, the Carbon Nutrient Balance [7] hypothesis relates carbon-based secondary compounds concentration to the balance between carbon and nitrogen in the plant and predic...

Ngày tải lên: 07/08/2014, 16:21

... environmental indicators.  e aim of this study was to clarify to what extent the spatial variation of environment a ects growth and adaptive traits in a provenance trial, and whether blocking can ... subdivi- sion is achieving homogeneous environmental conditions within blocks so that blocking can re- move the within-trial environmental variation by using blocks as...

Ngày tải lên: 07/08/2014, 10:21

... broadleaf trees such as O. brumata, larvae feeding on ageing foliage show de- clining growth rates and increasing dispersal with a dramatic increase in mortality since this dispersal is passive ... winter of 2002–2003. In addition to this large-scale survey, an intensive study was conducted in southeastern France by a team of the Institut National de la Recherche Agronom...

Ngày tải lên: 07/08/2014, 16:20