Báo cáo lâm nghiệp: "and nutrient cycling of a highly productive Corsican pine stand on former heathland in northern Belgium" docx

... distribution in a highly productive Cor- sican pine stand on a former heathland. This research also aimed to calculate stand nutrient uptake and requirement and to compare the ... proportions of 19 % and 12 % in Corsican pine stands (Pinus nigra ssp. maritima) growing on blown sands (Culbin Forest) at an age of 39 and 58 year...

Ngày tải lên: 09/08/2014, 04:20

... net assim- ilation (A m ), leaf area-based carbon net assimilation (A) , leaf nitro- gen concentration on a dry mass basis (N), stomatal conductance for water vapour (g s ), leaf carbon concentration ... trade-offs since carbon assimilation increases with increasing N and SLA, and decreases with in- creasing C and LD (Tab. II). It has been suggested that includ- ing additional traits re...

Ngày tải lên: 07/08/2014, 16:20

... ‘unequal’ kind of gene flow can in theory end up in altering the cytoplasmic content in a given population, and could partly explain the observed patterns of variation in cpDNA and mtDNA of Q. petraea ... and each bag contained two or more female flowers. No emasculation was applied as isolation was performed before the emerging of the male catkins. A total of 269 bags wer...

Ngày tải lên: 07/08/2014, 16:20

... PAR conversion efficiencies of a tropical rain forest R.J. Luxmoore 1 J.G. Saldarriaga 2 1 Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, ... U.S .A. , and 2 Tropenbos Program, Bogoti, Colombia Introduction The mean annual quantities of photosyn- thetically active radiation (PAR) absorbed during various stages of regeneratio...

Ngày tải lên: 09/08/2014, 04:20

Ngày tải lên: 07/08/2014, 03:22

... manage- ment-rating of site and stand- related hazards of bark beetle infestation in the High Tatra Mountains as an example for system application and verification. Forest Ecology and Management, 207: ... the bark beetle attacks on standing trees started in 2002–2003; in 2006 the situation turned to catastrophic state, with a real risk of a total for- est decline on l...

Ngày tải lên: 07/08/2014, 03:22

... device and software as for nitrogen estima- tion. SLA was calculated as the projected needle area to dry needle mass ratio. Mann-Whitney U-test within STATISTICA soft- ware (StatSoft Inc., Tulsa, ... needle/leaf clearly showing through the bud scales, and 4 – leaf per needle elon- gation). Shoot elongation growth was observed on exposed and shaded apical (ExA and ShA) and exposed and s...

Ngày tải lên: 07/08/2014, 03:22

... subplots, resulting in a variable area of the sample units. Estimation of parameters of the stand quantitative variable Let us assume that we evaluate the stand quantita- tive variable Y, e.g. ... applied in the evaluation of NFIM data. Estimation of parameters of tree qualitative variable Let us assume that we evaluate a tree qualitative variable, for example the r...

Ngày tải lên: 07/08/2014, 04:20

Ngày tải lên: 07/08/2014, 16:20

... Williams M.R., Growth of lesions of Phytophthora cinnamomi in stems and roots of jarrah (Eucalyptus marginata) in relation to rainfall and stand density in mediter- ranean forest of Western Australia, ... Similarly, certain amino-acids, e.g. proline, asparagine, alanine known to stimulate hyphal growth of Entoleuca (Hypoxylon) mammata were found in increased concentrations...

Ngày tải lên: 07/08/2014, 16:20