physicochemical parameters in a forest soil
Báo cáo khoa học: "Initial mineralization of organic matter in a forest plantation soil following different logging residue management techniques" pps
... are maintained The main objective of this research was to examine the effect of harvesting and slash management on mineralization of soil organic matter in a forest soil intensively managed In ... temperature and moisture content, factors that favour a rapid increase in the microbial population Increased microbial biomass may also be favoured by mechanical disturbance of the soil by increasing ... mineral soil under Pinus radiata on a coastal sand: influence of stand age and harvest management, Plant Soil 175 (1995) 167–177 [35] Salonius P.O., Effects of organic-mineral soil mixtures and...
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Geochemistry of inorganic arsenic and selenium in a tropical soil effect of reaction time, ph, and comp
... potential groundwater and surface water contamination by these contaminants Arsenic can exist in inorganic form, organic form, and gaseous state The oxidation states of As in the natural systems are ... values of their parameters as well as the correlation of determinations (r2 ) Arsenate and Se(IV) adsorption increased significantly with increased adsorbate loading initially and then increased ... QUANTA CHROME (AUTOSORB-1) 2.2 Adsorption experiments Materials and methods 2.1 Soil sample and characterization An uncontaminated reddish brown tropical soil sample was obtained from a site in...
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Báo cáo lâm nghiệp: " Mating system parameters in a natural population of Abies borisii regis Mattfeld" pdf
... balsam fir (Abies balsamea) Can J Bot 59, 1285-1291 Neale DB, Adams WT (1985) Allozyme and matingsystem variation in balsam fir (Abies balsamea) across a continuous elevational transect Can J Bot ... information matrix (Ritland 1986) In MLTR, standard errors are computed by bootstrap resampling of families, re-estimating parameters by maximum likelihood using initial parameter estimates and ... which is a limitation for intercrossing, similar val= recorded for other Abies: A alba, = 0.89 (Schroeder, 1989); A lasiocarpa, m t m t 0.89 (Shea, 1987); A balsamea, t m 0.89 (Neale and Adams, 1985)...
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Báo cáo y học: "Thymic function and T cell parameters in a natural human experimental model of seasonal infectious diseases and nutritional burden" potx
... centrifugation at 14,000 rpm for 15 minutes to separate into an aqueous RNA phase, an organic protein layer and a DNA interphase RNA was extracted by adding 0.5 ml isopropanol to the aqueous phase and ... molecular analyses JS participated in the field work; GM and SEM participated in drafting the manuscript All authors read and approved the final manuscript Competing interests The authors declare ... Ginde AA, Mansbach JM, Camargo CA Jr: Association between serum 25hydroxyvitamin D level and upper respiratory tract infection in the Third National Health and Nutrition Examination Survey Arch...
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Báo cáo y học: " Effects of different fibrinogen concentrations on blood loss and coagulation parameters in a pig model of coagulopathy with blunt liver injury" docx
... were used at a concentration of 1:100 For staining, the ABC Vectastain universal kit (Vector Laboratories, Burlingame, CA, USA) and haematoxylin as counterstain was used A blinded pathologist ... measurements and coagulation parameters after haemodilution Baseline parameters were comparable between groups (Tables and 2) The dilution caused a significant coagulopathy and a drop in platelets PT increased ... temperature and arterial and central venous pressure by femorally introduced catheters connected to a standard anaesthesia monitor (AS/3, Datex Ohmeda, Helsinki, Finland) Surgical preparation and...
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what can live in a forest
... THIS PAGE INTENTIONALLY LEFT BLANK by Sheila Anderson a Lerner Publications Company · Minneapolis A forest is a habitat It is where plants and animals live Forest animals have special adaptations ... Sheila What can live in a forest? / by Sheila Anderson p cm — (First step nonfiction Animal adaptations) Includes index ISBN 978–0–7613–4571–8 (lib bdg : alk paper) Forest animals—Adaption—Juvenile ... adaptations – things that help a plant or animal live in a specific habitat bills – beaks coat – a layer of fur habitat – a place to live quills – long, stiff, pointed rods on porcupines 22 Index bill...
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Báo cáo lâm nghiệp: "Ground based operation effects on soil disturbance by steel tracked skidder in a steep slope of forest" ppt
... that forest managers have to assess soil damage as harvesting occurs (Lacey, Ryan 2000) and is often used in visual assessments of site productivity changes because they indicate changes in infiltration, ... on the soil disturbance in a skid trail MATERIAL AND METHODS A field study was conducted at a Forestry Experimental Station of Tarbiat Modares University, located in a temperate forest in the ... rates, these machines are likely to remain the most common type of skidding machine used In mountainous and steep areas, the terrain slope is an important factor that affects operational efficiency,...
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Báo cáo lâm nghiệp: "C and 15 N isotopic fractionation in trees, soils and fungi in a natural forest stand and a Norway spruce plantation" pps
... volatilization, the gas has a lower δ15 N than ammonium remaining in the soil [37, 40] In heavily manured farmland, ammonium volatilization may induce a large increase in δ15 N of the remaining nitrogen ... NH+ and there is considerable variability in their ability to utilize NO− [49] In the view of many authors, inorganic N absorbed into hyphae is assimilated and translocated as amides and amino acids ... those obtained by Hobbie et al [26] in the Glacier Bay National Park (Alaska), where the δ13 C ranged from −29.7% (Alnus foliage) to −27.5% in organic soil and −25.6% in mineral soil In the first...
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Báo cáo lâm nghiệp: "Interannual variation of soil respiration in a beech forest ecosystem over a six-year study" pps
... model parameters without a significant gain in the explained variance The B values obtained on single year data (1997 and 2001), and on the whole data set with either a single or a variable pre-exponential ... concentration within RESULTS Soil respiration exhibited pronounced seasonal variations with minimal values in winter and high values in early summer Interannual variation of soil respiration 501 Table ... was now to investigate both seasonal and interannual variability of soil respiration The ability of an empirical model using soil temperature and soil water content as driving variables to predict...
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Báo cáo khoa học: "Soil CO in a beech forest: 2 efflux the contribution of root respiration Daniel" pptx
... by coring and dead roots in the trenched plots sorting remaining years after trenching The remaining fine root necromass was then compared to initial fine root biomass and necromass in soil cores ... by Nakane et al [17, 18] who estimated that root respiration contributes about half of soil carbon efflux in a 80-yearold Japanese red pine stand and in a 102-year-old oak forest (table III) In ... calculation assumed that changes in soil carbon content and changes in fine root biomass are negligible in comparison with carbon fluxes, i.e that soil organic matter and fine root biomass are...
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Báo cáo lâm nghiệp: " Survival and growth of Pinus halepensis Miller seedlings in a semi-arid environment after forest soil transfer, terracing and organic amendments" docx
... processes and water- holding capacity (Gupta et al, 1977; Khaleel et al, 1981) Mechanical terracing of slopes is a widely used technique in afforestation projects in Mediterranean Spain (Garc a Salmerón, ... USR was added to the planting holes only, originating an edge effect that did not appear in the mechanical terraces This may have determined different rates of organic matter mineralization as ... success (Albaladejo and Diaz, 1990; Roldán and Albaladejo, 1994) The present methods of soil preparation for afforestation in the semi-arid Mediterranean areas are based almost exclusively on mechanical...
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Bell & Howell Information and Learning 300 North Zeeb Road, Ann Arbor, MI 48106-1346 USA 800-521-0600UMI.The Potential of Soil Survey Data in a Quantitative Evaluation of Surficial Geology Mapping in Northern Maine by Rosalia EvansThesis submitted t pptx
... Madawaska fine sandy loam Madawaska fine sandy loam Made land Mapleton shaly silt loam Mapleton shaly silt loam Mapleton shaly silt loam Mixed alluvial land Monarda and Burnham silt loams Monarda ... loam Howland gravelly loam Howland gravelly loam Howland very stony loam Howland very stony loam Machias gravelly loam Machias gravelly loam Machias gravelly loam Madawaska fine sandy loam Madawaska ... kame terrace Glaciolacustrine originating as a blanket formation and a deltaic formation Colluvium originating on a kame terrace Organic swamp originating as a blanket formation Residuum originating...
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BIODIVERSITY CONSERVATION in COSTA RICA Learning the Lessons in a Seasonal Dry Forest pptx
... morning for residual resources Plants such as Crescentia alata (Bignoniaceae), Bombacopsis quinata (Bombacaceae), Hymenaea courbaril (Caesalpiniaceae), Enterolobium cyclocarpum, Inga vera, Lysiloma ... 1998 Pollination biology in a lowland Dipterocarp forest in Sarawak, Malaysia I Characteristics of the plantpollinator community in a lowland Dipterocarp forest American Journal of Botany 85:1477–1501 ... tropical pollinators, several pollen vectors migrate among habitats that may be spread over vast areas For example, in Guanacaste, moths that pollinate many tree species in the rainy season migrate...
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stork - living in a dynamic tropical forest landscape (blackwell, 2008)
... Park Indonesia 78 359 Los Katios National Park Colombia 72 000 Tikai National Park Guatemala 57 600 Sinharaja Forest Reserve Sri Lanka 864 Montane rainforest Venezuela Talamanca/Amistad Costa ... Austrobaileyaceae, Eupomatiaceae, Himantandraceae, Myristicaceae and Winteraceae of the order Magnoliales; Atherospermataceae, Gyrocarpaceae, Hernandiaceae, Idiospermaceae, Lauraceae and Monimiaceae of ... et al (2001) have shown that these upland forests are particularly sensitive to changes in temperature and rainfall Changes as small as a 1°C increase in temperature and a 10% decline in rainfall...
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variation of the germinable soil seed banks in a pasture infested by parthenium hysterophorus l.at kilcoy, south-eastern queensland
... waste lands (Mahadevappa 1999) Parthenium weed has also spread into Trinidad, Guyana, Jamaica, Nepal, Israel, South Korea, Taiwan, North Vietnam, Bangladesh, Sri Lanka, southern China, certain ... to certain Pacific Islands, to India, Pakistan, and Australia It has spread at an alarming rate achieving the status of a major weed within a relatively short period of time (Adkins & Navie 2006; ... reductions in pasture carrying capacity by up to 40% in Australia (McFadyen 1992) and even as much as 90% in India (Evans 1997) Cattle grazing in parthenium weedinfested grasslands gain less weight in...
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Soil microbial indices as bioindicators of environmental changes in a poplar plantation pot
... Statistical analysis Analysis of variance (ANOVA) was performed to evaluate the main effects of FACE, fertilization, time and their interaction on parameters analyzed Data were tested for normality ... microbial biomass to soil organic carbon (Anderson and Domsch, 1989) It also indicates the substrate availability to the soil microflora or, in reverse, the fraction of recalcitrant organic matter in ... nitrogen was assessed as the sum of ammonium and nitrate: ammonium was extracted in M KCl and was determined following Anderson and Ingram (1993) while nitrate was determined color- imetrically after...
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Báo cáo khoa học: "the Role of Non-Timber Forest Products (NTFPs) in Livelihood Strategies and Household Economies in a Remote Upland Village in the Upper Ca River Basin, Nghe An, Vietnam" pdf
... vegetables, fish and game, medicinal plants, resins, essences, and a range of barks and fibers such as bamboo, rattans, and a host of other palms and grasses” NTFPs are an indispensable part of ... research was conducted in Tha Lang, a poor hamlet in Bao Thang Commune, Ky Son District, Nghe An Province The hamlet was located in a valley in the Ca River Basin (CRB), at an altitude of 230m above ... growing cassava lasted long and this allowed its tuber to attain a large size Areas of swidden rice, maize and cassava were calculated from the number of kilograms of planted rice, planted maize...
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Báo cáo lâm nghiệp: "Amounts of throughfall and lysimetric water in a sub-mountain beech forest in the Kremnické vrchy Mts" ppt
... precipitation is the precipitation enabling larger water amounts to percolate into deeper soil layers The statistical evaluation has resulted in a finding that only 54–71% of the amount of water fallen ... at a 50 mm precipitation event Similar results were also obtained by Minďáš et al (2001) Statistical evaluation of the measured totals is summarized in Table CONCLUSION In summary, in our research ... interaction with plants, soil, and water balance – which was already pointed out by Papritz et al (1991) and Flückiger and Braun et al (1992) The differences in the soil water balance between the...
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Báo cáo lâm nghiệp: " Quantification of nutrient content in the aboveground biomass of teak plantation in a tropical dry deciduous forest of Udaipur, Indi" pdf
... and Singh (1988) in an oak forest and by Bargali et al (1992), in a Eucalyptus plantation, in Central Himalaya, India Acknowledgements The authors are grateful to Mr Jagadeesh Rao, Executive Director; ... Management of Soil, Water and Nutrients in Tropical Plantation Forests Australian Centre for International Agricultural Research (ACIAR), Monograph No 43 Canberra, Canberra Publishers: 571 NARWAL ... are found in bark (Table 3) Sharma and Pande (1989) found that bark is a tree component with the highest concentrations of Ca in hybrid Eucalyptus in and years old stands, and in Acacia auriculiformis...
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Báo cáo lâm nghiệp: " Growth of wild cherry (Prunus avium L.) in a mixture with other species in a demonstration forest" ppsx
... well as its capacity to keep its position in a stand MATERIAL AND METHODS A large stand with wild cherry trees as a standforming species in the area of Demonstration Forests in Kostelec nad Černými ... oblastiach Slovenska Acta Facultatis Forestalis Zvolen, 39: 21–31 ŠKVARENINOVÁ J., ŠKVARENINA J., 2005 Bioklimatická charakteristika vybraných pestovateľských lokalít čerešne vtáčej (Cerasus avium ... small proportions in stand basal area The paper is focused on detailed analysis of wild cherry trees, their growth dynamics and capability to keep their position as a stand-forming species As a...
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