Báo cáo lâm nghiệp:"Root biomass distribution under three co

Báo cáo lâm nghiệp: "On the occurrence of web-spinning sawflies of the genus Cephalcia (Hymenoptera, Pamphiliidae) in the Czech Republic" potx

... 57–62 Because of the lack of a recent survey of Cephal- cia species in the Czech Republic, the goals of this study were (i) to monitor web-spinning sawﬂies liv- ing on spruce in mountainous regions ... species occurrence. Canonical axes explain 65.8% of variability J. FOR. SCI., 53, 2007 (Special Issue): 57–62 59 Table 1. Survey of studied web-spinning sawﬂies...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical properties" pot

... Supported by the Ministry of Agriculture of the Czech Republic, Research Project No. MZE 0002070203. Comparison of the impact of blue spruce and reed Calamagrostis villosa on forest soil chemical ... mitigate the acidiﬁcation of soil solution and the leaching of basic cations of Ca and Mg from soil. is study aims to compare impact of...

Ngày tải lên : 07/08/2014, 03:22

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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

... diﬀerences in the root system development and health condition were found either between the trees of identical height from self-seeding and from planting in the region of Krušné hory Mts. and in the ... 452–461 JOURNAL OF FOREST SCIENCE, 53, 2007 (10): 452–461 Root system development and health condition of sycamore maple (Acer...

Ngày tải lên : 07/08/2014, 04:20

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Báo cáo lâm nghiệp: "Effect of gibberellic acid and ethephon on the germination of European beech dormant and chilled beechnuts" pptx

... Republic ABSTRACT: The effect of ethephon (80, 100 and 120 mg·l –1 ) and gibberellic acid (GA 3 ) (40, 300 and 1,000 mg·l –1 ) on the germination capacity (GC) and mean germination time (MGT) of European beech ... of the present paper was to deter- mine the eﬀect of gibberellic acid and ethephon on overcoming beechnut dormancy and stimulati...

Ngày tải lên : 07/08/2014, 10:21

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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

... Nor- way spruce (Picea abies [L.] Karst.) underplantings in the Hrubý Jeseník Mts. In the area concerned 19 research plots were established, representing the ridge sites of the 8 th FAZ of acid ... growth and development of Norway spruce plantings in the ridge part of the Hrubý Jeseník Mts. Keywords: Norway spruce; nutrient defi...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Extent and distribution of beech (Fagus sylvatica L.) regeneration by adult trees individually dispersed over a spruce monoculture" ppsx

... with a total area of 0.75 ha (Fig. 1) were mapped within the range of 22 individual beeches (their average spacing was about 16 m) on an area of 1.9 ha. Ap- proximately 40% of the stand area ... estima- tion of seed dispersal trees – an example of seed dispersal of Picea abies, Abies alba and Fagus sylvatica. Austrian Journal of Forest Science, 123: 103–120. M...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Effects of spruce, beech and mixed commercial stand on humus conditions of forest soils" pdf

... horizon in diﬀerent forest stands 0 1 2 3 4 5 6 Spruce forest stand Beech forest stand Mixed forest stand pH layer L layer F layer H Ah Mixed Beech Spruce forest forest forest stand stand stand 0 ... 40 Spruce forest stand Beech forest stand Mixed forest stand C/N layer L layer F layer H Ah Mixed Beech Spruce forest forest forest stan...

Ngày tải lên : 07/08/2014, 10:21

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Báo cáo lâm nghiệp: "Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst" docx

... SP/2d2/138/08. Plant community variability within potential natural vegetation units: a case study from the Bohemian Karst P. Š, K. P, P. U Silva Tarouca Research Institute for Landscape and Ornamental ... similarly broad distribution. DISCUSSION Actual vegetation based on the map of potential natural vegetation The stratification of this...

Ngày tải lên : 07/08/2014, 10:22

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Báo cáo lâm nghiệp: "Quantity and distribution of fine root biomass in the intermediate stage of beech virgin forest Badínsky prales" potx

... horizons rather by the reduction of the ﬁnest root length than by the reduction of root tips density. CONCLUSIONS The research of fine roots in the intermediate stage of a beech virgin forest ... cells with the dominant function of water and minerals supply. e ratio between the ﬁne root length and the number of root tips is an indicator...

Ngày tải lên : 07/08/2014, 10:22

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Báo cáo lâm nghiệp: "Aboveground biomass relationships for mixed ash (Fraxinus excelsior L. and Ulmus glabra Hudson) stands in Eastern Prealps of Friuli Venezia Giulia (Italy)" pptx

... 831 Ann. For. Sci. 62 (2005) 831836 â INRA, EDP Sciences, 2005 DOI: 10.1051/forest:2005089 Original article Aboveground biomass relationships for mixed ash (Fraxinus excelsior L. and Ulmus glabra Hudson) ... – About 5% of forest area of Friuli Venezia Giulia (Italy) is covered by mixed ash stands. In most cases, these are secondary forest establishe...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp: "The angular distribution of diffuse photosynthetically active radiation under different sky conditions in the open and within deciduous and conifer forest stands of Quebec and British Columbia, Canada" pptx

... INRA, EDP Sciences, 2006 DOI: 10.1051 /forest: 2005096 Original article The angular distribution of diffuse photosynthetically active radiation under different sky conditions in the open and within ... different sky conditions and periods of the day. Results of this study are useful for refining PAR models and determining the potential impac...

Ngày tải lên : 08/08/2014, 00:22

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Báo cáo lâm nghiệp:"Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp." ppt

... article Aboveground biomass relationships for beech (Fagus m oesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp. Dimitris ZIANIS*, Maurizio MENCUCCINI Institute ... to develop biomass equations for beech (Fagus moesiaca Cz.) trees growing in Vermio Mountain, Northern Greece. Some prelimi...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp:"Root biomass distribution under three cover types in a patchy Pseudotsuga menziesii forest in western Canada" pptx

... 10.1051 /forest: 2003040 Original article Root biomass distribution under three cover types in a patchy Pseudotsuga menziesii forest in western Canada Andrew D. RICHARDSON a *, Catherine BEALLE STATLAND b , Timothy ... hori- zontal lines indicate the mean value across all three cover types. Hea- vier, short lines indicate means within each cover type. In...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp:" Structure, spatial distribution and competition in mixed jack pine (Pinus banksiana) stands on clay soils of eastern Canada" pps

... growth of jack pine in pure jack pine stands and stands mixed with aspen or birch. They found no difference in the effect of intraspecific competition from jack pine and interspecific competition ... skewness in basal area distribution of jack pine between pure jack pine stands and stands composed of a mixture of jack pine and ei...

Ngày tải lên : 08/08/2014, 01:21

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Báo cáo lâm nghiệp: "The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regeneration" pdf

... capacity. The effects of transplanting stress on photosynthesis, stomatal conductance and leaf water potential in Cedrus atlantica Manetti seedlings: role of root regeneration J.M. ... were main- tained at 20°C in order to promote root regeneration. Assimilation rate measurements and root observations (number of growing roo...

Ngày tải lên : 09/08/2014, 04:20

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