نتایج جستجو برای: peat soils

تعداد نتایج: 53371  

2016
Tiffany Drake Mia Keating Rebecca Summers Aline Yochikawa Tom Pitman Antony N Dodd

Experimental research involving Arabidopsis thaliana often involves the quantification of phenotypic traits during cultivation on compost or other growing media. Many commercially-available growing media contain peat, but peat extraction is not sustainable due to its very slow rate of formation. Moreover, peat extraction reduces peatland biodiversity and releases stored carbon and methane into ...

2014
N. Walraven P. F. M. van Gaans G. van der Veer B. J. H. van Os G. Th. Klaver S. P. Vriend J. J. Middelburg

Knowledge on the lithologically inherited variation in present day Pb isotope ratios in soils is remarkably limited. Such information is essential to determine the anthropogenic Pb fraction and anthropogenic Pb sources in Pb polluted soils. This study presents results of a survey of subsoil samples of approximately 350 rural locations covering the entire Netherlands, for which the bulk geochemi...

اوستان, صابر, سلیقه‌دار, فائقه, صفری, علیرضا, نالوسی, ایوب ملااحمد,

Aloe vera is one of the most popular ornamental plants that is widely used in production of medicines and cosmetics. To investigate the effect of different ratios of peat and perlite on quantitative and qualitative characteristics of Aloe vera, a split-plot experiment, arranged as completely randomized design, with five substrates (peat, peat and perlite (1:3 v/v), peat and perlite (1:1 v/v), p...

2013
Alfred E. Hartemink J. G. Bockheim

a r t i c l e i n f o Keywords: Pedology Soil genesis Soil history Soil taxonomy Soil science in the USA The formation and classification of soils have been a key area of research in the soil science discipline. Major breakthroughs have been brought about since the mid 1800s and it has evolved from conceptual frameworks, to descriptive studies to more quantitative approaches. Some 50 years ago ...

Journal: :Environmental science & technology 2003
H Biester A Martinez-Cortizas S Birkenstock R Kilian

Ombrotrophic peat bogs have been widely used to evaluate long-term records of atmospheric mercury (Hg) deposition. One of the major aims of these investigations is the estimation of the increase in atmospheric Hg fluxes during the industrial age compared to preindustrial fluxes. Comparability of Hg accumulation rates calculated from density, peat accumulation rates, and Hg concentrations requir...

2008
Nicholas Kettridge Xavier Comas Andrew Baird Lee Slater Maria Strack Dan Thompson Harry Jol Andrew Binley

[1] The surface pattern of vegetation influences the composition and humification of peat laid down during the development of a bog, producing a subsurface hydrological structure that is expected to affect both the rate and pattern of water flow. Subsurface peat structures are routinely derived from the inspection of peat cores. However, logistical limits on the number of cores that can be coll...

2010
Jonathan A. O’Donnell

High-latitude regions store large quantities of organic carbon (C) in permafrost soils and peatlands, accounting for nearly half of the global belowground C pool. Projected climate warming over the next century will likely drive widespread thawing of near-surface permafrost and mobilization of soil C from deep soil horizons. However, the processes controlling soil C accumulation and loss follow...

2012
L. Matlova M. Kaevska M. Moravkova V. Beran J. E. Shitaye I. Pavlik

Peat used as a feed supplement for piglets has favourable dietetic qualities; however, its frequent contamination with potentially pathogenic mycobacteria (PPM) has been shown to pose a potential risk to piglet health. The purpose of the present study was to investigate possible ways of devitalising mycobacteria. Examination of 118 samples from various types of commercially available peat (natu...

Journal: :E3S web of conferences 2023

A relevant part of the geotechnical infrastructure in north Europe and overseas is built on soft organic soils, including peat. Peat extremely vulnerable to climate-related hazards as increased temperature accelerates drying, shrinkage decomposition matter. exhibits dramatic changes volume with water content. As material deforms, pore space evolves retention response. The evolution leads a hyst...

2007
Sim Siong Fong Murtedza Mohamed

The chemical characteristics of humic substances (HS) extracted from several samples of peat soils of Sarawak, Malaysia, were determined by size exclusion chromatography, FTIR, UV–Vis, acid–base titration, and elemental and total hydrolysable carbohydrate analyses. The results showed that the total acidity of these HS ranged between 5.8 and 8.3 meq/g, with a clear indication that the fulvic aci...

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