Báo cáo lâm nghiệp: " Soil and tree water relations in mature oak stands of northern Germany differing in the degree of decline" pdf
Báo cáo lâm nghiệp: " Soil and tree water relations in mature oak stands of northern Germany differing in the degree of decline" pdf
... per branch wasdetermined.Original article Soil and tree water relations in mature oak stands of northern Germany differing in the degree of declineFM ThomasG HartmannNiedersächsische ... reduced in the stands of the Hakel Forest. In these stands, the tensiometerswere placed within an area of about 20 m * 10 m.Since the subsoil of the declining stand consistedmainly ... water contents (RWC) and the osmotic pressure of leaves fromoaks differing in the degree of damage; iii)biomasses of living and dead fine roots of oaks differing in...
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Báo cáo lâm nghiệp: " Soil and plant communities development and ecological effectiveness of reclamation on a sand mine cast" ppt
... (D et al. 2001) and the bank of the Sulphur Mine in Piaseczno (South Poland).ere was an increase in the percentage of Corg in the Ai horizon corresponding to the age of the area; however ... with the age of the area. e amount of carbon and energy trapped in biomass and soil was twice higher in a forest ecosystem restored on post-mining areas of a sand opencast mine during the ... 1970s and 1980s some parts of the pits were scheduled to be mined again. However, falling demand for filling sand and mining restrictions meant that these parts were nei-ther mined again nor...
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Báo cáo lâm nghiệp: "Soil characteristics under selected broadleaved tree species in East Norwa" docx
... taken into mind discussing the interrelationships between the soil properties and the tree species.Differences among particular soil horizonse results of the testing for differences in selected ... D et al. 2001), indicating that other factors, as the chemical composition of the parent material and the soil texture, can discriminate the in uence of tree species on soil properties. Equally ... 2000), the other soil parameters ranged within values which are expected.Effect of tree species on selected soil properties Comparing the values of C:N and CEC in dif-ferent soil horizons of Humic...
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Báo cáo lâm nghiệp: "Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts" potx
... mg·kg–1. In the subsequent organomineral horizon (Ae/Ep) the values of Ca indicate the lower optimum reserves in the range of 80–160 mg·kg–1, and in 15% of the studied plots the content of soil ... 149derplantings increases with a decreasing content of these nutrients in needles. An opposite correlation was determined for aluminium: with an increasing proportion of this element in nutrition the ... contents in soil and degree of damage to underplantings were tested at the sites concerned (Tables 7 and 8). Damage to the studied under-plantings increases with a decreasing proportion of basic...
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Báo cáo lâm nghiệp: "Survival and growth of outplanted seedlings of selected tree species on the High Tatra Mts. windthrow area after the first growing season" pps
... resulted from 2004 windbreak in the High Tatra Mts. as very endangered from the viewpoint of the mechanical effect of wind. Regarding the stabilization of stands against wind the author emphasised ... the seedling types of pine was almost 20% in autumn and even 42% in spring outplanting. However, es-pecially the comparison of bareroot and container-ized spruce and pine seedlings in this ... Survival and damage of seedlings were calculated as a percentage of the number of living individuals from the total number of outplanted seedlings and damaged individuals from the number of survived...
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Báo cáo lâm nghiệp: "Linking intra-tree-ring wood density variations and tracheid anatomical characteristics in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco)" pot
... CWP and MMDadecreasedwithin the first half of a tree- ring; then it reached a plateau, and remained constant in the second half of the tree- ring (Fig. 2B).Correlations were high between the ... characteristics independently, in order toevaluate their relative in uences on wood density. For the firstset of simulations, all the variables in the model were fixedto values they take at the beginning of ... vary from one tree- ring to another (inter -tree- ring varia-tions) and how internal and external factors are related to thesevariations. A following paper will focus on these points with aparticular...
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Báo cáo lâm nghiệp: "Drought conditioning improves water status, stomatal conductance and survival of Eucalyptus globulus subsp. bicostata seedlings" ppt
... sessile leaves, in each selected leaf, the base of the lam-ina was cut with a sharp blade, and then they were placed in the cham-ber with the main vein protruding through the chamber opening.RWC ... periods using the fol-lowing equation: RGR (g g−1d−1) = ln M2–lnM1/ t2– t1,whereM1 and M2are dry mass at the beginning and the end of the samplingperiod, and t1 and t2are the dates ... sieved topsoil of medium texture, and sand(3:1) (v/v) on August 1999. Seedlings were maintained during the whole experiment in a glasshouse located in the experimental field of the Faculty of Agronomy,...
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Báo cáo lâm nghiệp: "Soil carbon dioxide efflux in pure and mixed stands of oak and beech" potx
... and mixed stands. The soils of all stands are well drained; the ground water is below 1.5 m depth during the growing season and rises in winter up to 30–45 cm depth. In each stand, all trees weremeasured ... patterns of soil temperature (a) and soil water content (b) in the oak, mixed and beech stands (zones without moisturetreatment, n = 3) and comparison of soil water content variations in the moist and ... mass of the forest floor and of the Ahhorizon, and root abundance in the three stands Leaf litterfall was similar in the oak, mixed and beech stands (P = 0.4900, Tab. II). In contrast, the forest...
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Báo cáo lâm nghiệp: "Leaf and whole-plant water relations of the Patagonian conifer Austrocedrus chilensis (D. Don) Pic. Ser. et Bizzarri: implications on its drought resistance capacity" ppt
... green-house in the EEA INTA Bariloche, Argentina. In addition, wecarried out some of these measurements in adult plants growing in sites with climatic conditions similar to those of the saplingsorigin.2. ... were installed on the south side of the trunk of each tree and covered with a radiation and rain shield to eliminate bias caused byradiation heating. Measurements were carried out every 10 min and stored ... was measured in adults of A. chilensis of the mesic site (Tab. I), in four individuals in January 2001 (diameter atbreast height, DAP = 28.0, 30.6, 34 and 38.9 cm) and in three trees in December...
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Báo cáo lâm nghiệp: "Seasonal and intraspecific variation of frost tolerance in leaves of three Canarian laurel forest tree species" doc
... grow-ing in the Canary Islands in order to understand whether the effect of freezing temperatures in the past could be the cause of their present confinement. Chlorophyll fluorescence as anindicator ... to the Atlantic islands where the weather conditions are milder. There are two main con-straints in the Mediterranean habitat for these plants, cold dur-ing the winter and drought during the ... fact that the initial symptoms of damage were a blushing of the main and sec-ondary veins and the damage was detected by chlorophyll fluo-rescence measurements only when the surface of the leaves...
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