Effect of land-use and elevation on microbial biomass and water extractable carbon in soils of Mt. Kilimanjaro ecosystems

Pabst, Holger; Kühnel, Anna; Kuzyakov, Yakov

doi:10.1016/j.apsoil.2013.02.006

Cited by 116 publications

(70 citation statements)

References 68 publications

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“…We found negative correlation between soil microbial biomass and elevation in the study region, which was not in line with some previous studies that reported a positive relationship between soil microbial biomass and elevation below 3000 m in elevation (Huang et al, 2014;Pabst et al, 2013;Wardle, 1992;Whitaker et al, 2014). Our result was supported by the recent finding that soil microbial biomass phosphorus decreases with elevation above 3500 m on the eastern slope of Gongga Mountain, China (Sun et al, 2013a) and was helpful in refining the current understanding of soil microbial biomass distributions.…”

Section: Relationships Between Soil Microbial Biomass and Elevation Isupporting

confidence: 79%

“…Da-an in Central Taiwan (Huang et al, 2014), Mt. Kilimanjaro in Tanzania (Pabst et al, 2013) and Cuenca Mountains in Spain (LucasBorja et al, 2012), suggested that soil MB at 2000-3000 m elevation is generally higher than those at lower elevations (<1000 m). Yet, it is still unclear whether such positive relationship holds true for higher elevations (>3000 m).…”

Section: Introductionmentioning

confidence: 99%

“…Yet, it is still unclear whether such positive relationship holds true for higher elevations (>3000 m). Evaluating soil MB at different elevations could also provide indirect evidences for global warming effects based on the "space-for-time" assumption (Huang et al, 2014;Pabst et al, 2013;Smith et al, 2002;Sundqvist et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Spatial variability of soil microbial biomass and its relationships with edaphic, vegetational and climatic factors in the Three-River Headwaters region on Qinghai-Tibetan Plateau

Shen

et al. 2015

Applied Soil Ecology

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a b s t r a c tThis study aims to investigate the level of soil microbial biomass (MB) and analyze the relationships between soil MB and edaphic, vegetational and climatic factors at high elevation sites (>3000 m). We collected soil samples from 0 to 10 cm soil depth in 259 plots at 55 sites across 6 biomes in Three-River Headwaters (TRH) region at 3280-5127 m elevation. Soil microbial biomass carbon and nitrogen (MBC and MBN) were measured with the chloroform fumigation-extraction method. Multivariate stepwise regression analyses were used to analyze the combined effects of edaphic, vegetational and climatic factors on soil MB. We found: (1) soil MBC and MBN had an average of 30.95 mmol C/kg dry soil and 5.84 mmol N/kg dry soil in TRH, respectively, and their values were found to be negatively correlated with elevation; (2) soil MB was found to be significantly different among different biomes, and this spatial variation could be explained by the levels of soil organic carbon and belowground plant biomass. Our results indicate that the MB at high elevation region might be very low, and the increasing trend of soil microbial biomass with elevation could reverse at higher elevations.

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Section: Relationships Between Soil Microbial Biomass and Elevation Isupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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Spatial variability of soil microbial biomass and its relationships with edaphic, vegetational and climatic factors in the Three-River Headwaters region on Qinghai-Tibetan Plateau

Shen

et al. 2015

Applied Soil Ecology

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“…Significantly, the highest content of C hwd was found in A horizon under junipers (Table 1). This finding was supported by work of Pabst et al (2013), Wang and Wang (2011) who stated that forest vegetation type significantly affected water-soluble soil organic matter fractions and in addition that hot-water-soluble method could be a suitable measure for labile SOM in subtropical forest soils.…”

Section: Resultssupporting

confidence: 70%

Soil organic matter quantity and quality of land transformed from arable to forest

Polláková¹,

Jończak²,

Szlováková³

et al. 2016

JCEA

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Comparative studies on quantitative and qualitative characteristics of soil organic matter were studied in arable and afforested in 1964 Stagni-Haplic Luvisol in Arboretum Mlyňany (Slovakia). The studies were conducted at three stands -arable soil located next to Arboretum (control), under thuja trees (Thuja orientalis L.) and under junipers (Juniperus Chinensis L.). Results of the studies showed, that in A horizons, 50 years of thuja and juniper trees growing on formerly arable land, had resulted to the significant (by 69% under thuja and by 126% under juniper) increase of total organic carbon (C ox ) compared to control arable land. KMnO 4 oxidisable carbon (C L ) and mainly hot water-soluble carbon (C hwd ) had higher contents in soil under studied trees than on arable land. The conversion of cropland to forest led to lowering of soil organic matter quality, assessed as the ratio of total carbon and nitrogen (C ox /N T ), which was in arable soil 10.2, under thuja trees 13.9 and under junipers 12.0. Surprisingly, the quality of humus between examined sites differed only minimally, since the change of humus quality is a long term process. (Juniperus Chinensis L.) boli porovnané s pôdou, ktorá zostala ornou, nachádzala sa hneď vedľa Arboréta a predstavovala kontrolné stanovište. Bolo zistené, že vplyvom výsadby tují a borievok na ornej pôde došlo za 50 rokov v A horizontoch k preukaznému zvýšeniu celkového obsahu organického uhlíka (o 69% pod tujami a o 126% pod borievkami) v porovnaní s kontrolnou ornou pôdou. Obsah organického uhlíka oxidovateľného s KMnO 4 (C L ), no najmä obsah v horúcej vode rozpustného uhlíka (C hwd ) bol vyšší v pôde pod skúmanými drevinami v porovnaní s ornou pôdou. Premenou ornej pôdy na lesnú došlo ku zníženiu kvality pôdnej organickej hmoty, určenej ako pomer celkového uhlíka a dusíka (C ox /N T ), ktorý mal v ornej pôde hodnotu 10,2, pod tujami 13,9 a pod borievkami 12,0. Kvalita humusu sa medzi skúmanými stanovišťami líšila minimálne, nakoľko zmena kvality humusu je dlhodobý proces. Premenou ornej pôdy na lesnú došlo ku zníženiu kvality pôdnej organickej hmoty, určenej ako pomer celkového uhlíka a dusíka (C ox /N T ), ktorý mal v ornej pôde hodnotu 10,2, pod tujami 13,9 a pod borievkami 12,0. V labilných formách uhlíka a dusíka boli rozdiely ešte výraznejšie. Prekvapivo, kvalita humusu skúmaná ako pomerné zastúpenie humínových kyselín a fulvokyselín bola nepatrne vyššia pod porastmi stromov, keď pomer v pôde pod borievkami bol 0,78 a pod tujami 0,65, kým v ornej pôde 0,63. Farebné koeficienty humusových látok aj humínových kyselín potvrdili vyššiu kvalitu humusu len pod tujami.Celkovo, vplyvom výsadby tují a borievok na ornej pôde došlo už v priebehu 50 rokov v A horizontoch ku značnému zvýšeniu celkového obsahu organickej hmoty a najmä jej labilných foriem a zároveň ku zníženiu kvality pôdnej organickej hmoty -čo je typické pre lesné ekosystémy v porovnaní s agroekosystémami. Na druhej strane, kvalita humusu sa medzi skúmanými stanovišťami líšila minimálne, nakoľko zmena k...

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“…Las fincas bajo manejo orgánico presentaron los mayores valores de este parámetro seguido de las fincas bajo manejo tradicional (Cuadro 1); asociado a un mayor aporte de materia orgánica por la adición de enmiendas orgánicas y la hojarasca de los árboles de sombra y café, y el menor valor en la finca convencional, donde solo hay aporte de hojarasca de café. Los valores de este estudio se asemejan a los reportados por Pabst et al (2013) , respectivamente.…”

Section: Carbono Hidrosoluble (Chs)unclassified

Actividad microbiológica y biomasa microbiana en suelos cafetaleros de los Andes venezolanos

Gómez

2018

Terra

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In Venezuela approximately 200 000 ha are planted with coffee (Coffea arabica L.) mostly on the steep slopes of the Andes. Traditionally, coffee is cultivated with few or no agrochemical inputs in an agroforestry system, cropped under the shade of tree species of the leguminous family and other bushes. In recent years, with adoption of high yielding, early varieties of short stature, coffee is being produced in full sunlight with addition of mineral fertilizers and pesticides. The soil microbiological properties especially those related with the fluxes of energy and nutrient cycling, respond promptly to changes in soil conditions, often much earlier than organic carbon and, in this way, are early indicators of alterations in soil quality. In this study, we compared the microbiological activity (basal respiration), microbial biomass and derived ecophysiological ratios of topsoils (0-5 cm) collected from eight farms in the municipalities of Merida and Trujillo that practice traditional (agroforestry or shaded coffee), conventional (sun coffee or intensive monoculture) and organic (agroforestry or shaded coffee) production. The organic agriculture farms showed the highest contents of total organic carbon, water soluble carbon, basal respiration and microbial biomass compared with traditional and conventional farms. This means a more sustainable coffee system with better conservation of natural resources and environment-friendly production. On conventional farms, added fertilizers and pesticides negatively affect microorganism performance and are more inefficient in terms of carbon and energy use.

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Effect of land-use and elevation on microbial biomass and water extractable carbon in soils of Mt. Kilimanjaro ecosystems

Cited by 116 publications

References 68 publications

Spatial variability of soil microbial biomass and its relationships with edaphic, vegetational and climatic factors in the Three-River Headwaters region on Qinghai-Tibetan Plateau

Spatial variability of soil microbial biomass and its relationships with edaphic, vegetational and climatic factors in the Three-River Headwaters region on Qinghai-Tibetan Plateau

Soil organic matter quantity and quality of land transformed from arable to forest

Actividad microbiológica y biomasa microbiana en suelos cafetaleros de los Andes venezolanos

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