Báo cáo lâm nghiệp: "in leaf development and thesis of Prunus serotina seedlings" doc
Báo cáo lâm nghiệp: "in leaf development and thesis of Prunus serotina seedlings" doc
... of thevariation. The simplest of these models isthe linear regression which explained 98% of the variation and does a good job of predicting leaf area from length and ... (Dickmann, 1971). ).ResultsAll of the models tested to predict leaf area from various combinations of leaf length and width had good correla-tions and significant regressions. ... effects on leaf resis-tance, leaf water potential, and photosynthesis of non-bearing prune trees. J. Am. Soc. Hortic.Sci. 106, 216-21 t>Larson P.R. & isebrands J.G....
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Báo cáo lâm nghiệp: "Water relation characteristics and photosynthesis of saline-stressed seedlings of non-halophyte species" pot
... characteristics and photosynthesis of saline-stressed seedlings of non-halophyte speciesT. SuzakiH. YahataH. ShigenagaLaboratory of Silviculture, Department of Forestry, Faculty of Agriculture, ... Theobjective of the present study was to ex-amine the distribution of salts and its effecton photosynthesis for non-halophytewoody species. In addition, the contribu-tion of sodium ... of net photosyntheticrates on d 32 tended to decrease as thesodium concentration in leaves increased.The changes of sodium and chlorideconcentration in leaves and of...
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Báo cáo lâm nghiệp: " Root system development and health condition of sycamore maple (Acer pseudoplatanus L.) in the air-polluted region of Krušné hory Mts" ppt
... region of Krušné hory Mts. and in the region of Bohemian-Moravian Upland or in a mu-tual comparison between the two regions (see stand situation 5, mutual comparison of stand situation 2 and ... system development, archi-tecture and health condition in the trees of identical height from planting between the Krušné hory Mts. and the Bohemian-Moravian Upland (see stand situ-ations 2 and ... the rooting depth and the length of horizontal roots – a Table 4. Vitality and mycorrhizal infection of fine rootsStand marking Month of samplingMycorrhiza typeVitality of fine roots Mycorrhizal...
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Báo cáo lâm nghiệp: "Oak growth, development and carbon metabolism in response to water stress" pps
... petraea and Qcerris that potentially differ widely in droughttolerance (Epron et al, 1993).CARBON ALLOCATION AND WATER STRESSWater stress and leaf development Leaf development ... Dreyer E (1990) Stomatal and non-stomatallimitations of photosynthesis by leaf water deficitsin three oak species: a comparison of gas exchange and chlorophyll a fluorescence ... genus contains both deciduous and evergreen species adapted to a widerange of sites from seasonally flooded wet-lands to xeric uplands and deep sands.Given this wide variation,...
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Báo cáo lâm nghiệp: "Distribution, historical development and ecophysiological attributes of oak species in the eastern United States " pdf
... between leaf nitrogen, leaf mass per area and photosynthesis inmaple and oak trees. Plant Cell Environ 14, 251-259Rice EL, Penfound WT (1959) The upland forests of Oklahoma. ... of tem-perature and light on photosynthesis of dominanttree species of a northern hardwood forest. Bot Gaz149, 203-208Keever C (1953) Present composition of some stands ... Appalachi-ans of western Pennsylvania through WestVirginia and into the Cumberland Mountains of Kentucky and Tennessee (fig 1). Aescu-lus octandra, Tilia heterophylla and Mag-nolia...
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Báo cáo lâm nghiệp: "Divergence among species and populations of Mediterranean pines in biomass allocation of seedlings grown under two watering regimes" pps
... the works of Lester [25] and Williams [52] and based on the heteroblasty of shoot development [21]. Seedlings were assigned to the values 0 for thecotyledonary stage, (1) for emergence of the epicotyl ... sig-nificance of those phenotypic changes from the perspective of the phenotypic plasticity of populations and the relationshipamong the observed changes and species differences regard-ing life history and ... We submitted half of the plants to a moderate water stress and after 22 weeks,we recorded height, stem diameter and root, stem and leaves dry weight. Patterns and amounts of phenotypic changes,...
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Báo cáo lâm nghiệp: "Stand structure, competition and growth of Scots pine (Pinus sylvestris L.) in a Mediterranean mountainous environment" pptx
... regen-erated even-aged stand, an uneven-aged stand, a stand with oak un-derstorey (Quercus pyrenaica Willd.) and a plantation. All four standswere situated at altitudes of between 1400 and 1500 m (Tab. ... the stands were first identified by photo-interpretation, visitedby experts, and a representative area of each type of structure wasdelimited. In each of these representative areas of each stand ... even-aged stand and weak in the uneven-aged stand and the plantation. In the uneven-aged and the mature even-aged stands, a weakly significant relationship was foundbetween diameter growth and tree...
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Báo cáo lâm nghiệp: "Post-transplant root and shoot development in Abies nordmanniana Spach. seedlings after whorl bud and branch pruning" potx
... 6,27]. Removal of thewhorl and lateral buds and whorl branches had a more severeeffect on plant growth and caused a reduction in root length and DW. Removal of a significant part of the photosyntheticarea ... September and shoot DW ended up not significantly dif-ferent from that of the untreated control seedlings. Removal of whorl and lateral buds and whorl branches reduced shoot846 L. Andersen et ... removal of whorl and lateral buds and whorl branch tips reduced root and shoot de-velopment, i.e. root length, root tips and DW in accordancewith results in A. menziesii [15]. However, the root and...
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Báo cáo lâm nghiệp: "Litterfall, nutrient return, and leaf-litter decomposition in four plantations compared with a natural forest in subtropical China" ppt
... of N and P, and lowerreturn of Ca than coniferous ones. While the amount of poten-tial return of K and Mg show no clear trend between broadleafs and conifers. Initial lignin concentration and ... loss of 14–48%; and the values of kK were much higher than those of k (Tab. V). This indicatedinitial leaching loss of K because of its solubility. Release of N began at once for all leaf ... rate of leaf litter. Compared with those of conifers, leaf- litters of broad-leafs had less recalcitrant materials and faster decay rate for drymatter, as well as faster actual release of N....
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Báo cáo lâm nghiệp: "Multivariate statistical approach to comparison of the nutrient status of Norway spruce (Picea abies [L.] Karst.) and top-soil properties in differently managed forest stands" potx
... fluctuations of soil moisture and many pests. Localities character-istic of central uplands of the Hrubý Jeseník Mts., where natural spruce stand, spruce stand influenced by silvicultural activities and ... analysis of variance (MANOVA) was applied. CLU and MANOVA were used to evaluate the close-ness of the nutrient status of the spruce stands and to assess the closeness of chemical properties of the ... managed) spruce stands.CLU explicitly indicates the rate of correlativity of soil properties. Figs. 6 and 7 document a set of soil properties associated with organic matter and a set of properties...
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