Báo cáo lâm nghiệp: "Post-transplant root and shoot development in Abies nordmanniana Spach. seedlings after whorl bud and branch pruning" potx

... that the fine root ratio is stable at least in the first growing period of new plantation and the best growing plants have about the same fine root ratio as the poorly growing ones. Even the regression ... explaining 92% of the relationship. An adequate proportion of fine roots (thinner than 2 mm) in the root system is another important parameter of p...

Ngày tải lên: 07/08/2014, 03:22

... 6215648902, and the Ministry of Agriculture of the Czech Republic, Project QG 60060. Response of the Norway spruce (Picea abies [L.] Karst.) root system to changing humidity and temperature conditions ... difference in the rooting depth of the whole root system (see Rooting depth of the whole root sys- tem). As the result of dis...

Ngày tải lên: 07/08/2014, 03:22

... Comparison of general tree characteristics of less known oak species Quercus dalechampii Ten. and Quercus polycarpa Schur R. M Faculty of Forestry and Wood Technology, Mendel University of Agriculture ... Average total height of measured trees of both studied species Fig. 2. Average height of the live crown base of both studied species Q....

Ngày tải lên: 07/08/2014, 03:22

... e application of A. cilicica, A. alba and A. nordmanniana resulted in 14% of germi- nating seedlings at least. Utilizing A. concolor, A. grandis and A. pinsapo lowered the germination rate ... 2009. 2009 In spring 2009 (beginning May 1 st ) pollination took place in two out of the four seed orchards (1 and 4).  e pollen of Abies fraseri was obtained from North Carol...

Ngày tải lên: 07/08/2014, 10:21

... di- amine putrescine (Put), triamine spermidine (Spd) and tetramine spermine (Spm). ere are a number of reports indicating that PAs play a crucial role in somatic embryo development including ... hurst ecotype of Norway spruce. Contents of free polyamines (putrescine, spermi- dine, and spermine) were determined in different developmental stages of Norway spruce somatic...

Ngày tải lên: 07/08/2014, 10:21

... discusses possibilities of using the portable falling weight deflectometer to measure the bearing capacity and compaction of forest soils. Within the study, measurements were made using manual ... available to root hairs and pores under 0.001 mm are not inhabitable even by micro - Possibilities of using the portable falling weight deflecto...

Ngày tải lên: 07/08/2014, 10:21

... main forest ecosystems pools from Spain and Latin America, this study compares C pools of three forest ecosystems: a tropical deciduous forest in Mexico, a tropical wet forest in Cuba and a temperate ... 0–10 cm and 10–20 cm, and their C concentrations were determined in automated C analyzer (CM 5012, UIC, Inc). Soil C contents were calculated taking in ac-...

Ngày tải lên: 07/08/2014, 16:20

... 801 c  INRA, EDP Sciences, 2006 DOI: 10.1051/forest:2006063 Original article Fungi associated with Tomicus piniperda in Poland and assessment of their virulence using Scots pine seedlings Robert ... col- onizer of pine tree stems. Tomicus piniperda, together with its cogener T. minor (Hrtg.), ranks among the main insect pests of Scots pine in P...

Ngày tải lên: 07/08/2014, 16:20

... from transplanting until September was 229% in untreated controls, 147% in seedlings in which whorl and lateral buds and whorl branch tips had been removed and 79% where whorl and lat- eral buds and whorl branches ... at transplanting: Whorl and lateral buds and whorl branch tips removed A(), whorl and lateral buds and whorl branches removed B (...

Ngày tải lên: 07/08/2014, 16:20

... TSR in the oak, mixed and beech stands. The annual heterotrophic respiration of the forest floor ac- counted respectively for 68, 74 and 51% of the annual FFR in the oak, mixed and beech stands ... 10.1051/forest:2006098 Original article Soil carbon dioxide efflux in pure and mixed stands of oak and beech Mathieu J * , Frộdộric A , Franỗois J,Nicol...

Ngày tải lên: 07/08/2014, 16:20

... primarily to investi- gate some of the changes that occur in the seedling root sys- tems of 6 species of forest tree (Tab. I) when grown in compe- tition with grass under nursery conditions, and secondarily whether ... 10.1051/forest:2003052 Original article Seedling root growth of six broadleaved tree species grown in competition with grass...

Ngày tải lên: 08/08/2014, 01:21

... 763772 â INRA, EDP Sciences, 2004 DOI: 10.1051/forest:2003071 Original article Chemical composition of the periderm in relation to in situ water absorption rates of oak, beech and spruce fine roots Christoph ... from the terminal root tip in all species. At 500 mm distance from the tip, periderm thickness had increased to 50 àm in beech and...

Ngày tải lên: 08/08/2014, 01:21

... Ormosia xylocarpa (OX) and Castanopsis kawakamii (CK), and an adjacent natural forest of Castanopsis kawakamii (NF): (1) fine -root biomass, distribu- tion and seasonal patterns; and (2) fine -root production ... 10.1051 /forest: 2004062 Original article Fine root distribution, seasonal pattern and production in four plantations compared with a natur...

Ngày tải lên: 08/08/2014, 01:22

... wears by the features extracted from the parallel force and noise level. The purpose is to determine the feasibility of using parallel force and noise level to monitor the extent of wear of the ... the rate of the increase of the parallel force and the noise level. 3. Though the coated tools are applied for different cuttin...

Ngày tải lên: 08/08/2014, 01:22

... Components of woody-tissue respiration in Abies amabilis D.G. Sprugel College of Forest Resources, AR-10, University of Washington, Seattle, WA 98195, U.S.A. Introduction Although respiration ... grow- ing season represent maintenance respiration rates. Growth respiration for growing season measurements is then estimated by subtracting maintenance...

Ngày tải lên: 09/08/2014, 04:20