Báo cáo lâm nghiệp: "in heating units pollination bags avoid damage to flowers by spring frost" ppt
Báo cáo lâm nghiệp: "in heating units pollination bags avoid damage to flowers by spring frost" ppt
... of spring frost sensitive tree species.Reçu le 4 novembre 1987.Accept! le 19 novembre 1987.Electric heating units in pollination bags avoid damage to flowers by spring ... heated bags, 70 p. 100 of the artificially pollinated flowers were still living.In conclusion, electric heating of pollination bags is a quick, cheap and efficientway to ... for heating every pollination bag. 10W heating units are used and an electronicregulation has been added. The total cost, including a 400 m (220W) cable dug into theground...
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Báo cáo lâm nghiệp: "SHORT COMMUNICATION The use of cotyledon proteins to assess the genetic diversity in sweet holm oak" potx
... 2009 (11): 526–531JOURNAL OF FOREST SCIENCE, 55, 2009 (11): 526–531Storage seed proteins have proved to be a useful tool to evaluate genetic variability in many species (G 1990), and have ... cotyledon) were un-lipped with diethyl ether and acetone. Cotyledon proteins were sequen-tially extracted according to the method described by F et al. (1997). Four fractions (albumins, ... to set up appropri-ate management strategies, mainly in reforestation. In this respect, this method of analyzing cotyledon storage proteins (glutelins) could be considered an additional tool...
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Báo cáo lâm nghiệp: "Influence of tree species on gross and net N transformations in forest soils" ppsx
... essentially provided by N depo-sition and soil N mineralization. Bacteria and fungi can trans-form organic N into ammonium (NH4). Ammonium can beoxidized to nitrate (NO3) by chemoautotrophic bacteria, ... sometimes foundbetween gross nitrification rates measured by isotopic dilutionof nitrate or by isotopic enrichment of nitrate can be explained by soil heterogeneities in the distribution of15NH4/14NH4or15NO3/14NO3and/or ... NH154NO3solution at1% atom excess. These low amounts of N added were chosen in order to avoid artificially increasing the fluxes. Soils were incubated from9th until 11th April.In order to confirm the difference...
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Báo cáo lâm nghiệp: "Germination response of alder and birch seeds to applied gibberellic acid and priming treatments in combination with chilling" ppt
... tied plastic bags in a refrigerator at 4 ± 1◦C (in thedark) and stored for 0, 15, 30, 60, 90 or 120 days. The seed to airvolume ratio was about 1:4. The bags were shaken once weekly to prevent ... chilling to re-lease dormancy before they can germinate [18], so the effectof priming might be expected to vary with dormancy intensityprior to priming.The objective of this study was to determine ... factors, handling and storage prac-tices prior to treatment [19] may have caused some of theseresponses.4.2. Experiment 1. Applied GA3It appears that GA3reduced the chilling requirement to release...
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Báo cáo lâm nghiệp: "Influence of the fertilisation method in controlled ectomycorrhizal inoculation of two Mediterranean pines" ppt
... (7) P. tinctorius vegetative inoculum/NF,(8) P. tinctorius vegetative inoculum/SF, (9) P. tinctorius vegetativeinoculum/SRF, (10) P. tinctorius spores inoculum/NF, (11) P. tinc-torius spores ... R.G., Role for the pho-tosynthate demand of ectomycorrhizas in response of Douglas-firseedlings to drying soil, New Phytol. 117 (1991) 327–334.[13] Garbaye J., The role of ectomycorrhizal symbiosis ... tinctoriusViP. tinctoriusSpoM. ambiguusEctomycorrhizal short roots (%)Non- fertilised Soluble fertiliser Slow-release fertiliseraaaaabaaaaab0255075100L. laccata P. tinctoriusViP....
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Báo cáo lâm nghiệp: "In vitro clonal propagation of Acacia mangium Willd. and its evaluation of genetic stability through RAPD marker" ppsx
... investigation was carried out to explore the mor-phogenic potential of Acacia mangium by using different com-binations of growth regulators. The nodal explants resumednew bud growth by proliferating the ... tropical countries of South East Asia, especially in acidand degraded soils, to which it can restore fertility owing to itsnatural nitrogen fixing ability. Besides, this tree is used as asource ... adjusted to pH 5.7 using 0.1 N HCl or0.1 N NaOH before autoclaving. The medium was gelled with 0.8%(w/v) agar (Qualigen, India). Routinely, 20 mL of molten medium wasdispensed into a culture...
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Báo cáo lâm nghiệp: "Micrometeorological assessment of sensitivity of canopy resistance to vapour pressure deficit in a Mediterranean oak forest * " potx
... UK), placed1.5 m above the top of the canopy.Heat storage into the canopy biomass wasevaluated assuming that its temperature couldbe related to the temperature of the ... airtemperature, respectively. Heat stored into theair was calculated as in Thom (1975).Soil heat flux was determined by measuringdeep storage with heat flux plates (model ... to a regular increaseof surface resistance throughout the day,linked to the increase in vapour pressuredeficit. The coupling of sensitivity to watervapour deficit to...
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Báo cáo lâm nghiệp: "in dormancy breaking of tree seeds" pptx
... otherfundamental metabolic indicators; 2) re-cognition of the influence of polyamineson seed dormancy breaking as compared to the influence of growth regulators andmodifiers of polyamine ... during dormancy breaking issimilar to that of kinetin (A. platanoides)and GA (F excelsior), which makes it pos-sible to suggest a regulatory function forthis polyamine.ReferencesKorcz ... stratification, they were in-hibitory throughout the whole period ofdormancy breaking (Fig. 5). When appliedbefore cold stratification, they were stimu-latory during the first half...
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Báo cáo lâm nghiệp: "In vitro propagation of Prosopis P. cineraria and P. juliflora) species" potx
... is less inhibitory to root production than is BA. High concen-trations of BA, but not of K in combinationwith auxins, promote shoot proliferationprobably by stimulating ... proliferationprobably by stimulating axillary budgrowth. Medium to high concentrations ofauxin in combination with low to mediumcytokinin concentrations promote shootgrowth. The results ... Further work with P. juliflora isrequired to optimize culture conditions foreach stage.AcknowledgmientsThis research was funded by the Henry Double-day Research Association.ReferencesFelker...
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Báo cáo lâm nghiệp: "In situ measurement of leaf water use efficiency of lilac (Syringa vulgaris): comparison with crop plants" docx
... (A!)and leaf conductance to C02 (g!) is de-scribed by a hyperbolic curve (Schulzeand Hall, 1982; Kuppers. 1984), whichmay be reduced to both asymptotes (Per-eira et al., ... factors in photosyn-thesis. New Phytol. 72, 1089-1094Kuppers M. (1984) Carbon relations and com-petition between woody species in a CentralEuropean hedgerow. II. Stomatal ... photosynthe-sis relationship of cotton leaves. Agric. Meteo-rol. 2, 259-270Farquhar G.D. & Sharkey T.D. (1982) Stomatalconductance and photosynthesis. Annu. Rev.Plant Physiol....
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