scholarly journals Soil-forming effect of Douglas fir at lower altitudes – a case study

2013 ◽  
Vol 59 (No. 9) ◽  
pp. 345-351 ◽  
Author(s):  
I. Kupka ◽  
V. Podrázský ◽  
J. Kubeček
Keyword(s):  
Forest Soil ◽  
Nutrient Dynamics ◽  
Soil Analysis ◽  
Acid Sites ◽  
Douglas Fir ◽  
Soil Biodiversity ◽  
Tree Species Composition ◽  
Coniferous Species ◽  
Humus Forms

Forest ecosystem and in particular forest soil biodiversity and stability could be jeopardised by the impropriate tree species composition. Douglas fir is a species which has a high potential in Europe both from economic and biodiversity aspects of forest management. A more detailed analysis of Douglas fir effects on the humus forms and forest soil under different conditions is needed to evaluate the future use of this species in central European forests. The study plots cover acid sites with natural hardwood, spruce monoculture and Douglas fir stands. The soil analysis proved favourable effects of this species on soil chemistry, organic matter as well as nutrient dynamics. When compared with domestic coniferous species, Douglas fir proved to have lower acidifying effects on upper soil layers and contributes to better humus forms, recycling nutrients more effectively and producing litter which could be easily decomposed.    

LAND USE TYPES AND SOIL CHARACTERISTICTS: A CASE STUDY IN HUONG VINH COMMUNE, HUONG TRA TOWN, THUA THIEN HUE PROVINCE

2017 ◽  
Vol 126 (4B) ◽  
Author(s):  
Trần Thanh Đức
Keyword(s):  
Land Use ◽  
Sweet Potato ◽  
Soil Analysis ◽  
Soil Characteristics ◽  
Low Ph ◽  
Clay Loam ◽  
Total N ◽  
Land Use Types ◽  
Total P

This research carried out in Huong Vinh commune, Huong Tra town, Thua Thien Hue province aimed to identify types of land use and soil characteristics. Results showed that five crops are found in Huong Vinh commune including rice, peanut, sweet potato, cassava and vegetable. There are two major soil orders with four soil suborders classified by FAO in Huong Vinh commune including Fluvisols (Dystric Fluvisols<em>, </em>Gleyic Fluvisols and Cambic Fluvisols) and Arenosols (Haplic Arenosols). The results from soil analysis showed that three soil suborders including Dystric Fluvisols<em>, </em>Gleyic Fluvisols and Cambic Fluvisols belonging to Fluvisols were clay loam in texture, low pH, low in OC, total N, total P<sub>2</sub>O<sub>5</sub> and total K<sub>2</sub>O. Meanwhile, the Haplic Arenosols was loamy sand in texture, poor capacity to hold OC, total N, total P<sub>2</sub>O<sub>5</sub> and total K<sub>2</sub>O

Site classification in a mixed hardwood forest (Hallerbos, Belgium) with a homogeneous ground vegetation dominated by Hyacinthoides non-scripta (L.) Chouard ex. Rothm.

1994 ◽  
Vol 59 ◽  
Author(s):  
D. Maddelein ◽  
B. Muys ◽  
J. Neirynck ◽  
G. Sioen
Keyword(s):  
Tree Species ◽  
Ph Value ◽  
Soil Analysis ◽  
Base Cation ◽  
Site Quality ◽  
Ground Vegetation ◽  
Site Classification ◽  
Species Classification ◽  
Tree Species Composition ◽  
Understorey Vegetation

The  forest of Halle (560 ha), situated 20 km south of Brussels is covered by a  beech (Fagus sylvatica)  forest, locally mixed with secundary species (Tilia,  Fraxinus, Acer, Quercus,... ). In almost all  stands, herbal vegetation is dominated by bluebell (Hyacinthoides  non-scripta).     The research intended to classify 36 plots of different tree species  composition according to their site quality. Three classification methods  were compared: the first one based on the indicator value of the understorey  vegetation, a second one on the humus morphology and a last one on some  quantitative soil characteristics. According to the plant sociological site  classification, the plots have the same site quality. However, humus forms  differ apparently and significant differences were found in pH value and base  cation saturation of the soil, abundance and biomass of earthworms and  biomass of the ectorganic horizon. Tree species proved to be the main cause  of these differences.     The results illustrate that the herbal vegetation is not always a reliable  indicator of site quality. In the case of a homogeneous vegetation dominated  by one or more indifferent species, classification on humus morphology or  soil analysis are more appropriate. In the forest of Halle, the tree species  is probably the main cause of the observed differences in site quality.

scholarly journals Gene Expression Profiling of a Compatible Interaction Between Douglas-Fir and the Root Rot Fungal Pathogen Phellinus sulphurascens

2013 ◽  
Vol 103 (6) ◽  
pp. 583-593 ◽  
Author(s):  
M. A. Islam ◽  
Rona N. Sturrock ◽  
Abul K. M. Ekramoddoullah
Keyword(s):  
Cdna Library ◽  
Root Rot ◽  
Douglas Fir ◽  
Coniferous Species ◽  
Elevated Expression ◽  
Plant Genes ◽  
Polymerase Chain ◽  
Fungal Genes ◽  
Root Tissues ◽  
Host Genes

Douglas-fir (DF) (Pseudotsuga menziesii) is one of the largest and most economically important coniferous species in western North America. Its productivity is greatly affected by the root rot fungus Phellinus sulphurascens Pilát. Evidence of resistance by DF to fungal root pathogens such as P. sulphurascens has been reported but mechanisms of resistance in this compatible pathosystem are not yet known. To better understand the DF–P. sulphurascens interaction, especially at the molecular level, we selected 12 diverse plant genes already identified as defense-related from a cDNA library constructed using root tissues from P. sulphurascens-infected DF seedlings. Using quantitative reverse-transcriptase polymerase chain reaction on infected DF root samples collected at five different time points after inoculation, we found that P. sulphurascens infection significantly elevated expression of the 12 selected genes. In most cases the highest expression level was recorded within 2 to 3 days after inoculation. The constructed cDNA library, which is enriched with defense-related host genes and a number of fungal genes, will continue to serve as a useful resource for future larger-scale gene discovery and functional research on the P. sulphurascens and DF pathosystem.

Quantitative infra-red studies of Brønsted acid sites in zeolites: Case study of the zeolite mordenite

2016 ◽  
Vol 83 ◽  
pp. 170-179 ◽  
Author(s):  
Nikolay Cherkasov ◽  
Tanya Vazhnova ◽  
Dmitry B. Lukyanov
Keyword(s):  
Acid Sites ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brønsted Acid Sites ◽  
Brönsted Acid ◽  
Infra Red ◽  
Brönsted Acid Sites ◽  
Bronsted Acid Sites

Nutrient dynamics in an Andean forest region: a case study of exotic and native species plantations in southern Ecuador

New Forests ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 313-334
Author(s):  
Pablo Quichimbo ◽  
Leticia Jiménez ◽  
Darío Veintimilla ◽  
Karin Potthast ◽  
Alexander Tischer ◽  
...  
Keyword(s):  
Native Species ◽  
Nutrient Dynamics ◽  
Forest Region ◽  
Southern Ecuador

scholarly journals Regional assessment of forest effect on watershed hydrology: Slovakia as a case study  405

2013 ◽  
Vol 59 (No. 10) ◽  
pp. 405-415
Author(s):  
HlásnyT ◽  
SitkováZ ◽  
I. Barka
Keyword(s):  
Water Regime ◽  
Forest Cover ◽  
Stand Density ◽  
Watershed Hydrology ◽  
Natural Conditions ◽  
Tree Species Composition ◽  
Weak Limits ◽  
Spring Area ◽  
Regulatory Capacity

Recently, the importance of forest effect on watershed hydrology has been increasingly recognized due to an elevated threat of floods and expected alterations of water regime in watersheds induced by climate change. We assessed the trade-off between natural conditions of 61 basic watersheds in Slovakia and expected water-regulatory capacity of forest in these watersheds. A multi-criteria decision-making scheme was proposed to calculate a coefficient for each watershed indicating the need to regulate its water regime as given by natural conditions, and another coefficient indicating the magnitude of forest water-regulatory capacity given by forest structure and distribution. Factors indicating the forest water-regulatory capacity were extent of forest cover, forest fragmentation and distribution in watersheds relative to the spring area, forest stand density and vertical structure, and tree species composition. The results indicate that the present structure and distribution of forests in Slovakia has potential to moderately regulate the water regime at the scale of basic watersheds. We identified critical watersheds where natural conditions imply the unfavourable water regime and/or the forest water-regulatory capacity is weak. Limits of forest effect on watershed hydrology and caveats for interpreting the presented findings are discussed.&nbsp;

Do forest soil microbes have the potential to resist plant invasion? A case study in Dinghushan Biosphere Reserve (South China)

2017 ◽  
Vol 81 ◽  
pp. 1-9 ◽  
Author(s):  
Bao-Ming Chen ◽  
Song Li ◽  
Hui-Xuan Liao ◽  
Shao-Lin Peng
Keyword(s):  
Forest Soil ◽  
South China ◽  
Plant Invasion ◽  
Soil Microbes ◽  
Biosphere Reserve

A method for deriving net primary productivity and component respiratory fluxes from tower-based eddy covariance data: a case study using a 17-year data record from a Douglas-fir chronosequence

2007 ◽  
Vol 13 (2) ◽  
pp. 370-385 ◽  
Author(s):  
CHRISTOPHER R. SCHWALM ◽  
T. ANDREW BLACK ◽  
KAI MORGENSTERN ◽  
ELYN R. HUMPHREYS
Keyword(s):  
Eddy Covariance ◽  
Primary Productivity ◽  
Net Primary Productivity ◽  
Douglas Fir ◽  
Data Record
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