نتایج جستجو برای: soil carbon

تعداد نتایج: 443008  

A. Salehi, G. Zahedi Amiri

The field study was conducted in one district of Educational-Experimental forest at Tehran University (Kheirood-Kenar forest) in the North of Iran. Eighty-five soil profiles were dug in the site of study and several chemical and physical soil properties were considered. These factors included: soil pH, soil texture, bulk density, organic carbon, total nitrogen, extractable phosphorus and depth ...

2014
Tanise Luisa Sausen Michely Tomazi Lívia Scheunemann Luís Mauro Gonçalves Rosa

Soil carbon accumulation is largely dependent on net primary productivity. To our knowledge, there have been no studies investigating the dynamics of carbon accumulation in weathered subtropical soils, especially in managed eucalyptus plantations. We quantified the seasonal input of leaf litter, the leaf decomposition rate and soil carbon stocks in an commercial plantation of Eucalyptus saligna...

Journal: :journal of rangeland science 2011
m. mahdavi h. arzani m. mesdaghi kh. mahdavi j. mahmodi

since renaissance, the natural ecosystems have fallen into a complete state ofdisarray due to the rise in the amount of carbon dioxide. soil, the unsparing stuff, is one of themajor sources of carbon storage, and plays a paramount role in the global equilibrium ofcarbon as well as carbon sequestration. given that iran is benefiting from vast steppes, therate of carbon sequestration in them dese...

Journal: :Global change biology 2017
Zhongkui Luo Wenting Feng Yiqi Luo Jeff Baldock Enli Wang

Soil organic carbon (SOC) dynamics are regulated by the complex interplay of climatic, edaphic and biotic conditions. However, the interrelation of SOC and these drivers and their potential connection networks are rarely assessed quantitatively. Using observations of SOC dynamics with detailed soil properties from 90 field trials at 28 sites under different agroecosystems across the Australian ...

2010
Shuhua Yi A. David McGuire Eric Kasischke Jennifer Harden Kristen Manies Michelle Mack Merritt Turetsky

[1] Ecosystem models have not comprehensively considered how interactions among fire disturbance, soil environmental conditions, and biogeochemical processes affect ecosystem dynamics in boreal forest ecosystems. In this study, we implemented a dynamic organic soil structure in the Terrestrial Ecosystem Model (DOS‐TEM) to investigate the effects of fire on soil temperature, moisture, and ecosys...

2012
Sarah Evans

Goal To determine the relative importance of different mechanisms that influence carbon loss from soil under variable soil-moisture conditions. The soil contains more carbon than the atmosphere and plants combined (Scurlock and Hall 1998). This carbon is important for maintaining soil fertility, controlling erosion, and the long-term storage of carbon that could be released into the atmosphere....

Journal: :محیط زیست طبیعی 0
حامد جنیدی جعفری استادیار دانشکدۀ منابع طبیعی دانشگاه کردستان‏ احمد صادقی پور استادیار دانشکدۀ کویر‏شناسی دانشگاه سمنان نادیا کمالی دانشجوی دکتری مرتع‏داری دانشکدۀ منابع طبیعی دانشگاه تهران شیما نیکو استادیار دانشکدۀ کویر‏شناسی دانشگاه سمنان

due to the notable role of different land uses in carbon sequestration and emission, four treatments including rangeland as control, haloxylon plantation area, olea plantation (olive garden), and residential lands, were selected to study the effects of land use change on soil carbon sequestration and emissions in eivanakei rangelands, semnan province. carbon stocks in vegetation and soil of eac...

2017
Naishen Liang Munemasa Teramoto Masahiro Takagi Jiye Zeng

This paper describes a project for evaluation of global warming's impacts on soil carbon dynamics in Japanese forest ecosystems. We started a soil warming experiment in late 2008 in a 55-year-old evergreen broad-leaved forest at the boundary between the subtropical and warm-temperate biomes in southern Japan. We used infrared carbon-filament heat lamps to increase soil temperature by about 2.5 ...

2003
Marcus F. Selig

The thinning of loblolly pine plantations has a great potential to influence the fluxes and storage of carbon within managed stands. This study looked at the effects of thinning on aboveground carbon and mineral soil carbon storage, 14-years after the thinning of an 8-year-old loblolly pine plantation on the piedmont of Virginia. The study also examined soil respiration for one year following t...

Journal: :مدیریت خاک و تولید پایدار 0
علیرضا کریمی هیات علمی سمیه باقریفام دانشگاه فردوسی مشهد حسین شایسته زراعتی دانشکده کویر شناسی، دانشگاه سمنان

soil is known as a suitable reservoir for carbon sequestration. the objective of this study was to investigate the capability of haloxylon on sequestration of carbon in sand dunes of yahya abad, sabzevar, in northeastern iran. eighty soil samples were taken from two depths of 0-5 and 5-10 cm under and between haloxylon trees. eight soil profiles under and between haloxylon trees were described ...

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