Báo cáo lâm nghiệp: "PAR conversion efficiencies of a tropic

Báo cáo lâm nghiệp: "PAR conversion efficiencies of a tropical rain forest" docx

... PAR conversion efficiencies of a tropical rain forest R.J. Luxmoore 1 J.G. Saldarriaga 2 1 Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, ... U.S .A. , and 2 Tropenbos Program, Bogoti, Colombia Introduction The mean annual quantities of photosyn- thetically active radiation (PAR) absorbed during various stages of regener...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "The reproductive success of a Quercus petraea × Q. robur F1-hybrid in back-crossing situations" potx

... point, number of lobes, number of intercalary veins, basal shape of the lamina and abaxial lamina pubescence) were assessed on five fully expanded and undamaged leaves from the first flush of 44 D.C. ... indication of true spe- ciation. Also, the facts that the two species occupy different edaphic habitats in Denmark, and that a nationwide allozyme study of 26 Danish populations has...

Ngày tải lên : 07/08/2014, 16:20

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Báo cáo lâm nghiệp: "and nutrient cycling of a highly productive Corsican pine stand on former heathland in northern Belgium" docx

... (TF- BP-DD). Canopy leaching of Ca, Mg and K minus canopy leaching of Ca, Mg and K asso- ciated with foliar excretion of weak acids was further assumed to equal uptake of H and ... Correspondence and reprints E-mail: johan.neirynck@rug.ac.be canopy exchange and Ca-, Mg- and K-bear- ing particles are assumed to have the same mass median diamet...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "Photosynthesis and growth of present New Zealand forest trees relate to ancient climates" ppt

... subtropical, with seas 5-7°C, warmer than today. That warmth was maintained Photosynthesis and growth of present New Zealand forest trees relate to ancient climates B.J. Hawkins G.B. ... climates of the last two million years, replacing species of a much older tropical and subtropical flora (Cox ei al., 1976). ’ Author to whom correspondence...

Ngày tải lên : 09/08/2014, 04:20

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Báo cáo lâm nghiệp: "The first reaction of soil mite fauna (Acari, Mesostigmata) caused by conversion of Norway spruce stand in the Szklarska Poręba For" potx

... 2.75 Parazercon radiatus 9 30.00 3.44 Trachytes pauperior 14 35.00 2.75 Paragamasus crassicornutus 5 20.00 1.91 Paragamasus crassicornutus 13 45.00 2.55 Uropoda misella 5 10.00 1.91 Parazercon radiatus ... similarity rates (Table 8) the highest rates (over 68) had two pairs of experimental plots: 1 and 2 and 5 and 6 and the other pairs 3 and 4 and 7 and 8 still had a similarity rates...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "An economic aspect of conversion of Scots pine (Pinus sylvestris L.) stands in the Polish Lowland" docx

... year 2004. At the beginning, mean volumes of pine stands requiring conversion at the age of 1–160 years as well as mean volumes of oak stands of the same age range were calculated. Next, mean ... single-species pine stands was 92,800 ha and that of mixed stands in which pine was a dominant species – 37,700 ha (Table 1). e above data was obtained from the Regional Director...

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Intensively fertilised seedlings of the beech (Fagus sylvatica L.) for artificial regeneration of the spruce stands in the process of conversion" pdf

... treatment (application of foliar nutrition only), they all achieved the parameters of established plantation in the same time interval (in 4 th year after planting), – the equalisation of average ... ﬁnding is that four years after planting the beech plants of all treatment variants including the control satisfy the criteria of an established plantation. At the time of plan...

Ngày tải lên : 07/08/2014, 04:20

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Báo cáo lâm nghiệp: "Assessing the potential of natural woody species regeneration for the conversion of Norway spruce plantations on alluvial soils" doc

... geological layers of sandy and calcareous rocks, from the Triassic and Jurassic periods. It mainly consists of rolling farmlands and small forests as an extension of the Lorraine plateau. Tree ... shading and small changes in the R/FR-ratio of radiation, Ann. For. Sci. 60 (2003) 163–171. [2] Ashton P.M.S., Gamage S., Gunatilleke I .A. U.N., Gunatilleke C.V.S., Restoration of a Sri...

Ngày tải lên : 08/08/2014, 01:22

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Báo cáo lâm nghiệp: "This special issue of the Journal of Forest Science is a result of the international conference Species Diversity, Population Structure and Impact of Animals and" pdf

Ngày tải lên : 07/08/2014, 03:22

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Báo cáo lâm nghiệp: "Spatio-temporal patterns of the Norway spruce decline in the Beskid Śląski and Żywiecki (Western Carpathians) in southern Poland" pot

... management-rating of site and stand-related hazards of bark beetle infestation in the High Tatra Mountains as an example for system application and veriﬁcation. Forest Ecology and Management, 207: ... level assessed as high and catastrophic was recorded on 40% of the area, while in 2006 – on 59%. e range of Armillaria root disease and bark beetle outbreak increased towards hi...

Ngày tải lên : 07/08/2014, 03:22

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