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Biofertilization of Degraded Southern African Soils with Cyanobacteria Affects Organic Matter Content and Quality

Biofertilization of Degraded Southern African Soils with Cyanobacteria Affects Organic Matter... We studied, under laboratory conditions, the effects of Nostoc 9v (cyanobacteria) on the soil organic matter (SOM) content and quality of different soils from Tanzania, Zimbabwe, and South Africa. Soils were inoculated with Nostoc 9v at a rate of 5 mg dry biomass g−1 soil and incubated for 3 months at 27°C under 22 W m−2 illumination for 16 h and 8 h under darkness. Moisture content was maintained at 60% of field capacity. The composition of the SOM and the structural features of the humic acid (HA) fraction were studied by visible and infrared (IR) spectroscopies. Nostoc 9v proliferated and colonized the surfaces of all soils very quickly. The results obtained showed significant changes in the quantitative and qualitative characteristics of the SOM due to cyanobacterial growth. Inoculation and further incubation with Nostoc 9v promoted increases in organic carbon (OC) that ranged from 0.4 g C kg−1 soil to 9.0 g C kg−1 soil. Cyanobacterial growth also affected SOM characteristics through the incorporation of free, extractable, or particulate biomass with a predominantly aliphatic character. Important descriptors of the extent to which cyanobacterial metabolism modified the characteristics of the native SOM were the changes in the observed amounts of the two humin types, the increase in lipid concentration, and the changes in the optical density of the HAs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arid Land Research and Management Taylor & Francis

Biofertilization of Degraded Southern African Soils with Cyanobacteria Affects Organic Matter Content and Quality

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Biofertilization of Degraded Southern African Soils with Cyanobacteria Affects Organic Matter Content and Quality

Abstract

We studied, under laboratory conditions, the effects of Nostoc 9v (cyanobacteria) on the soil organic matter (SOM) content and quality of different soils from Tanzania, Zimbabwe, and South Africa. Soils were inoculated with Nostoc 9v at a rate of 5 mg dry biomass g−1 soil and incubated for 3 months at 27°C under 22 W m−2 illumination for 16 h and 8 h under darkness. Moisture content was maintained at 60% of field capacity. The composition of the SOM...
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Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1532-4990
eISSN
1532-4982
DOI
10.1080/15324982.2010.502918
Publisher site
See Article on Publisher Site

Abstract

We studied, under laboratory conditions, the effects of Nostoc 9v (cyanobacteria) on the soil organic matter (SOM) content and quality of different soils from Tanzania, Zimbabwe, and South Africa. Soils were inoculated with Nostoc 9v at a rate of 5 mg dry biomass g−1 soil and incubated for 3 months at 27°C under 22 W m−2 illumination for 16 h and 8 h under darkness. Moisture content was maintained at 60% of field capacity. The composition of the SOM and the structural features of the humic acid (HA) fraction were studied by visible and infrared (IR) spectroscopies. Nostoc 9v proliferated and colonized the surfaces of all soils very quickly. The results obtained showed significant changes in the quantitative and qualitative characteristics of the SOM due to cyanobacterial growth. Inoculation and further incubation with Nostoc 9v promoted increases in organic carbon (OC) that ranged from 0.4 g C kg−1 soil to 9.0 g C kg−1 soil. Cyanobacterial growth also affected SOM characteristics through the incorporation of free, extractable, or particulate biomass with a predominantly aliphatic character. Important descriptors of the extent to which cyanobacterial metabolism modified the characteristics of the native SOM were the changes in the observed amounts of the two humin types, the increase in lipid concentration, and the changes in the optical density of the HAs.

Journal

Arid Land Research and Management – Taylor & Francis

Published: Sep 7, 2010

Keywords: African soils; cyanobacteria; humic acids; soil organic matter; visible and infrared spectroscopy

References

  • Cyanobacterial inoculation of heated soils: Effect on microorganisms of C and N cycles and on chemical composition in soil surface
  • Production of brown and green humic-like substances by Ulocladium atrum
  • A structural study of alkyl polymers in soil after perborate degradation of humin
  • Land use and soil carbon accumulation patterns in South African savanna ecosystems
  • Light fraction soil organic matter and available nitrogen following trees and maize
  • Determination of total organic and available forms of phosphorus in soils
  • Information provided in humic substances by E4/E6 ratios
  • Etude d'une méthode d'extraction de la matière humique du sol
  • Composition of organic matter in a subtropical Acrisol as influenced by land use, cropping and N fertilization, assessed by CPMAS 13C NMR spectroscopy
  • Effect of cultivation on the organic matter content of selected dryland soils in South Africa
  • Comparaison des processus d'humification dans les principaux types d'humus forestiers
  • Étude par spectrographie infrarouge de produits de l'humification en milieu hydromorphe calcique
  • Effect of Nostoc (Cyanobacteria) inoculation on the structure and stability of clay soils
  • How are soil use and management reflected by soil organic matter characteristics: A spectroscopic approach
  • Decomposition of 14C labelled plant material under tropical conditions
  • An evaluation of cation exchange capacity measurements for soils in the Tropics
  • Absorption spectra of humic acids
  • Green humic acid and its possible origin as fungal metabolite
  • Soil surface management in the tropics for intensive land use and high and sustained productivity
  • Development of a DTPA soil test for zinc, iron, manganese and copper
  • Effect of the inoculation of cyanobacteria on the microstructure and the stability of a tropical soil
  • Morphology and microstructure of microbiotic soil crusts on a tiger bush sequence (Niger, Sahel)
  • Nostoc cyanobacterial inoculation in South African soils enhances soil structure, fertility and maize growth
  • The management of organic matter in tropical soils: What are the priorities
  • Declining soil quality in South Africa: Effects of land use on soil organic matter and surface crusting
  • Soil organic carbon (SOC) management for sustainable productivity of cropping and agro-forestry systems in Eastern and Southern Africa
  • Total carbon, organic carbon and organic matter
  • Problems with and local solutions for organic matter management in Vietnam
  • Effect of indigenous cyanobacterial application on structural stability and productivity of an organically poor semi-arid soil
  • The retention of organic matter in soils
  • Effect of Nostoc sp. on soil characteristics, plant growth and nutrient uptake
  • Generic assignements, strain histries and properties of pure cultures of cyanobacteria
  • Changes in aggregate stability, nutrient status, indigenous microbial populations, and seedling emergence, following inoculation of soil with Nostoc muscorum
  • An ultraviolet absorbance method of estimating the percent aromatic carbon content of humic acids
  • The impact of cultivation and carbon fluxes in woody savannas of Southern Africa
  • The importance and management of soil organic matter in the tropics
  • Long-term changes in organic matter in woodland soils cleared for arable cropping in Zimbabwe