Papers by Bhupinder Singh
Global change biology, Jul 1, 2018
Agronomic practices such as crop residue return and additional nutrient supply are recommended to... more Agronomic practices such as crop residue return and additional nutrient supply are recommended to increase soil organic carbon (SOC) in arable farmlands. However, changes in the priming effect (PE) on native SOC mineralization in response to integrated inputs of residue and nutrients are not fully known. This knowledge gap along with a lack of understanding of microbial mechanisms hinders the ability to constrain models and to reduce the uncertainty to predict carbon (C) sequestration potential. Using a C-labeled wheat residue, this 126-day incubation study examined the dominant microbial mechanisms that underpin the PE response to inputs of wheat residue and nutrients (nitrogen, phosphorus and sulfur) in two contrasting soils. The residue input caused positive PE through "co-metabolism," supported by increased microbial biomass, C and nitrogen (N) extracellular enzyme activities (EEAs), and gene abundance of certain microbial taxa (Eubacteria, β-Proteobacteria, Acidobacte...
Indian Journal of Microbiology, 2008
Metagenomics-the application of the genomics technologies to nonculturable microbial communities,... more Metagenomics-the application of the genomics technologies to nonculturable microbial communities, is coming of age. These approaches can be used for the screening and selection of nonculturable rumen microbiota for assessing their role in gastrointestinal (GI) nutrition, plant material fermentation and the health of the host. The technologies designed to access this wealth of genetic information through environmental nucleic acid extraction have provided a means of overcoming the limitations of culture-dependent microbial genetic exploitation. The molecular procedures and techniques will result in reliable insights into the GI microbial structure and activity of the livestock gut microbes in relation to functional interactions, temporal and spatial relationships among different microbial consortia and dietary ingredients. Future developments and applications of these methods promise to provide the fi rst opportunity to link distribution and identity of rumen microbes in their natural habitats with their genetic potential and in situ activities.
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Papers by Bhupinder Singh