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Soil Biology & Biochemistry 38 fl e

by M. Werth, I. Subbotina, Y. Kuzyakov
"... approaches based on C labelling. The method for partitioning total below-ground CO2 efflux into three sources using a natural C labelling technique failed due to the small proportion of active microbial biomass in the rhizosphere. This small active fraction led to a difference between this labelled ..."
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approaches based on C labelling. The method for partitioning total below-ground CO2 efflux into three sources using a natural C labelling technique failed due to the small proportion of active microbial biomass in the rhizosphere. This small active fraction led to a difference between this labelled

Elevated atmospheric CO2 increases microbial growth rates in soil: results of three CO2 enrichment experiments

by unknown authors
"... Increasing the belowground translocation of assimilated carbon by plants grown under elevated CO2 can cause a shift in the structure and activity of the microbial community responsible for the turnover of organic matter in soil. We investigated the long-term effect of elevated CO2 in the atmosphere ..."
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Increasing the belowground translocation of assimilated carbon by plants grown under elevated CO2 can cause a shift in the structure and activity of the microbial community responsible for the turnover of organic matter in soil. We investigated the long-term effect of elevated CO2 in the atmosphere

RESPIRATION OF RECENTLY-FIXED PLANT CARBON DOMINATES MID-WINTER ECOSYSTEM CO2 PRODUCTION

by In Sub-arctic, Heath Tundra, Paul Grogan, Lotte Illeris, Anders Michelsen, Sven Jonasson
"... Abstract. Arctic ecosystems could provide a substantial positive feedback to global climate change if warming stimulates below-ground CO2 release by enhancing decomposition of bulk soil organic matter reserves. Ecosystem respiration during winter is important in this context because CO2 release from ..."
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and bulk soil organic matter C pools to ecosystem CO2 production in mid-winter were investigated. We measured CO2 efflux rates in Swedish sub-arctic heath tundra from control plots and from plots that had been clipped in the previous growing season to disrupt plant activity. Respiration derived from

Subterranean, herbivoreinduced plant volatile increases biological control activity of multiple beneficial nematode species in distinct habitats

by Jared G. Ali, Hans T. Alborn, Raquel Campos-herrera, Fatma Kaplan, Larry W. Duncan, Cesar Rodriguez-saona, Lukasz L. Stelinski - PlosONE , 2011
"... While the role of herbivore-induced volatiles in plant-herbivore-natural enemy interactions is well documented aboveground, new evidence suggests that belowground volatile emissions can protect plants by attracting entomopathogenic nematodes (EPNs). However, due to methodological limitations, no stu ..."
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While the role of herbivore-induced volatiles in plant-herbivore-natural enemy interactions is well documented aboveground, new evidence suggests that belowground volatile emissions can protect plants by attracting entomopathogenic nematodes (EPNs). However, due to methodological limitations

Impact of Ash-Fertilization and Soil Preparation on Soil Respiration and Vegetation Colonization on Cutaway Peatlands

by N Hytönen , J
"... Abstract As a result of several decades of peat extraction, the area of cutaway peatlands in Finland totals ca. 50,000 ha. Furthermore, some 2000 -3000 ha of peatlands are abandoned annually from active peat extraction. Forestry is considered to be their main after-use option. However, since cutawa ..."
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Abstract As a result of several decades of peat extraction, the area of cutaway peatlands in Finland totals ca. 50,000 ha. Furthermore, some 2000 -3000 ha of peatlands are abandoned annually from active peat extraction. Forestry is considered to be their main after-use option. However, since

AGR 05

by Università Degli, Studi Della Tuscia, Dottorato Di Ricerca, Candidato Tutori, Alessandra Lagomarsino, Prof Paolo, De Angelis, Prof Stefano Grego, Prof Paolo, De Angelis
"... Responses of soil biological processes to elevated atmospheric [CO2] and nitrogen addition in a poplar plantation ..."
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Responses of soil biological processes to elevated atmospheric [CO2] and nitrogen addition in a poplar plantation

Effect of living roots on soil organic matter decomposition. Soil Biol. Biochem

by Weixin Cheng, David C. Cd-n , 1990
"... Summary-Published information is contradictory about the inhibitory or stimulatory effect of living roots on soil organic matter d~m~sition. In this study, i4C-labelled rye straw was exposed in fertilii or unfertilized soil with or without plants (winter rye, Se&e cereuIe) for 49 days under semi ..."
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@tion due to the higher microbial activity induced by the roots. This stimulatory effect was reduced by application of fertilizer. Contradictory data exist in the literature about the effects of living roots on soil organic matter decom-position. Decomposition of labelled plant material is markedly lowered

Rain pulse response of soil CO2 exchange by biological soil crusts

by unknown authors
"... [1] Biological activity in arid grasslands is strongly dependent on moisture. We examined gas exchange of biological soil crusts (biocrusts), the underlying soil biotic community, and the belowground respiratory activity of C3 and C4 grasses over 2 years in southeast Utah, USA. We used soil surface ..."
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CO2 flux and the amount and carbon isotope composition (d13C) of soil CO2 as indicators of belowground and soil surface activity. Soil respiration was always below 2 mmol m−2 s−1 and highly responsive to soil moisture. When moisture was available, warm spring and summer temperature was associated

NOOTROPIC ACTIVITY OF FRUIT EXTRACTS OF LITCHI CHINENSIS

by Petricia Regina Irene, D Jeevan, Mani Babu, N Ventak Rao, Rizwan A Sheikh
"... Received on 24-09-2012 Accepted on 07-10-2012 In traditional system of medicine the plant is extensively used for different ailments like intestinal and throat problems, general body pain, neuralgic disorders and tonic to brain, heart and liver. Further no scientific data is available on the nootrop ..."
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on the nootropic activity of fruit extracts of this plant. Hence the present study was aimed to explore the nootropic activity of this plant in experimental animal like mice. Nootropic activity of alcoholic (AEFLC) and aqueous (AQEFLC) extracts of fruit of L.chinensis sonn was evaluated in Passive avoidance model

Journal of Experimental Botany Inhibition of nitrogenase activity and nodule oxygen permeability by water deficit1

by Rachid Serraj, Thomas R. Sinclair , 1996
"... Short-term effects of water deficit on nitrogenase activity were investigated with hydroponically grown soybean plants (Glycine max L. Merr. cv. Biloxi) by adding polyethylene glycol (PEG) to the hydroponic solution and measuring nitrogenase activity, nodule respiration, and permeability to oxygen d ..."
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Short-term effects of water deficit on nitrogenase activity were investigated with hydroponically grown soybean plants (Glycine max L. Merr. cv. Biloxi) by adding polyethylene glycol (PEG) to the hydroponic solution and measuring nitrogenase activity, nodule respiration, and permeability to oxygen
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