Enriching vermicompost by nitrogen fixing and phosphate solubilizing bacteria

Kumar, Vivek; Singh, Kishan

doi:10.1016/s0960-8524(00)00061-4

Cited by 119 publications

(58 citation statements)

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“…Use of vermicompost in the sustainable agriculture caused significant increases in the population of beneficial microorganism such as mycorrhizal fungi and phosphate dissolving bacteria and fun gi in the soil. Production of nutritious elements such as nitrogen, transferable phosphor, magnesium, dissolved potassium required for the plants and causes improvement in the growth and function of the agricultural plants (Martinez et al, 2000;Kumar & Singh, 2001;Srivastava et al, 2002). Information's regarding the effect of fertilizers on the functioning of maize crop are in scarcity therefore present study has been conducted to find out the effect of chemical nitrogen fertilizer and vermicompost on the function and component of maize seed traits.…”

Section: Introductionmentioning

confidence: 99%

Effect of vermicompost and chemical nitrogen fertilizer application on the various functioning of maize seeds

Namazi¹,

Lack²,

Nejad³

2015

JEBAS

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(0), 5 and 10 tons in hectare. Results of the study showed a significant correlation between the quantitative traits of maize seed and various levels of chemical Nitrogen fertilizer and vermicompost. Highest functioning of maize seed was obtained from the treatment containing 100 percent Nitrogen and 10 tons/hectare of vermicompost while the lowe st amount was obtained from the treatment containing 50 percent Nitrogen without vermicompost application. Furthermore, application of vermicompost and chemical Nitrogen fertilizer affects the biological f unction and increase in the yield of seed in rows and weight of each 1000 seeds, also has positive and meaningful effect on the index of maize seed's harvesting. The results of the study revealed that the application of Nitrogen fertilizer at the levels of 50 and 75 percents of area soil test and vermicompost at the level of 5 tons in a hectare in this area are appropriate to obtain the maximum yield and proper functioning.

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Section: Introductionmentioning

confidence: 99%

Effect of vermicompost and chemical nitrogen fertilizer application on the various functioning of maize seeds

Namazi¹,

Lack²,

Nejad³

2015

JEBAS

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“…Nevertheless, only a small number of species that presently belong to the genus Pseudomonas sensu stricto are known to be phosphatesolubilizers and they all belong to rRNA group I (Palleroni et al, 1973;Palleroni, 1992). Pseudomonas putida (Viveganandan & Jauhri, 2000;Kumar & Singh, 2001;Manna et al, 2001; Villegas & Fortin, 2002), Pseudomonas aeruginosa (Musarrat et al, 2000), Pseudomonas corrugata (Pandey & Palni, 1998), Pseudomonas stutzeri (Vázquez et al, 2000) and Pseudomonas fluorescens (Di Simine et al, 1998;Deubel et al, 2000) are the most studied species. Nevertheless, many rhizospheric, phosphate-solubilizing bacterial species remain unknown and more studies are needed to reveal the high biodiversity of these bacteria.…”

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confidence: 99%

Pseudomonas rhizosphaerae sp. nov., a novel species that actively solubilizes phosphate in vitro

Peix

Rivas

Mateos

et al. 2003

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLO

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A bacterial strain (designated IH5 T ), isolated from rhizospheric soil of grasses growing spontaneously in Spanish soil, actively solubilized phosphates in vitro when bicalcium phosphate was used as a phosphorus source. This strain was Gram-negative, strictly aerobic, rod-shaped and motile. The strain produced catalase, but not oxidase. Cellulose, casein, starch, gelatin, aesculin and urea were not hydrolysed. Growth was observed with many carbohydrates as the carbon source. The main non-polar fatty acids detected were hexadecenoic acid (C 16 : 1 ), hexadecanoic acid (C 16 : 0 ) and octadecenoic acid (C 18 : 1 ). The hydroxy fatty acids detected were 3-hydroxydecanoic acid (C 10 : 0 3-OH), 3-hydroxydodecanoic acid (C 12 : 0 3-OH) and 2-hydroxydodecanoic acid (C 12 : 0 2-OH). Phylogenetic analysis of 16S rRNA indicated that this bacterium belongs to the genus Pseudomonas in the c-subclass of the Proteobacteria and that the closest related species is Pseudomonas graminis. The DNA G+C content was 61 mol%. DNA-DNA hybridization showed 23 % relatedness between strain IH5 T and P. graminis DSM 11363 T . Therefore, strain IH5 T belongs to a novel species from the genus Pseudomonas, for which the name Pseudomonas rhizosphaerae sp. nov. is proposed (type strain, IH5 T =LMG 21640 T =CECT 5726 T ).Phosphorus is an essential plant nutrient that is added to soil as soluble inorganic phosphates, a large proportion of which becomes insoluble and therefore unavailable to plants (Singh & Kapoor, 1994). Many species of bacteria are able to solubilize phosphates in vitro and most of them live in the plant rhizosphere. At present, bacilli, rhizobia and pseudomonads are the most studied phosphate-solubilizers (Rodríguez & Fraga, 1999). Nevertheless, only a small number of species that presently belong to the genus Pseudomonas sensu stricto are known to be phosphatesolubilizers and they all belong to rRNA group I (Palleroni et al., 1973;Palleroni, 1992). Pseudomonas putida (Viveganandan & Jauhri, 2000;Kumar & Singh, 2001;Manna et al., 2001; Villegas & Fortin, 2002), Pseudomonas aeruginosa (Musarrat et al., 2000), Pseudomonas corrugata (Pandey & Palni, 1998), Pseudomonas stutzeri (Vázquez et al., 2000) and Pseudomonas fluorescens (Di Simine et al., 1998;Deubel et al., 2000) are the most studied species. Nevertheless, many rhizospheric, phosphate-solubilizing bacterial species remain unknown and more studies are needed to reveal the high biodiversity of these bacteria. Although the study of rhizospheric bacteria is difficult, due to the high number of bacteria present in soil, characterization and identification of these bacteria are necessary for wide ecological studies of the plant rhizosphere.During a wide study of phosphate-solubilizing, rhizospheric bacteria in soils from northern Spain, we isolated a strain that produced a yellow pigment in media that contained glucose as the carbon source and formed a transparent 'halo' around its colonies in media that contained insoluble bicalcium phosphate as the phosphorus source.A sample...

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“…The inoculation of consortium of microorganisms Aspergillus niger, P. sajor-caju, Azotobacter chroococcum, Trichoderma harzianum not only accelerated vermicomposting of crop residues and farm yard manure but also enriched the quality of product [17]. During the incubation period the inoculated bacterial strains proliferated rapidly, fixed nitrogen, solubilised, and added native phosphate [23]. Pressmud alone and in combination with other byproducts of sugar processing industries was pre-decomposed for 30 days by inoculation with combination of Pleurotus sajorcaju, Trichoderma viridae, Aspergillus niger, and Pseudomonas striatum, followed by vermicomposting for 40 days with the native earthworm, Drawida willsi.…”

Section: Enrichment Of Vermicompost Withmentioning

confidence: 99%

Microbial Enrichment of Vermicompost

Rajasekar

Daniel

2012

ISRN Soil Science

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The present study has been conducted to explore the possibility of enrichment of vermicompost with microbial inoculants (i.e., biofertilizer organisms), Azospirillum brasilense and Rhizobium leguminosarum, optimization of inoculum level, and time of inoculation during vermicomposting. The survival rate of each microbial inoculant, total microbial population in vermicompost, and their correlation with the microbial inoculants during the storage period (180 days) were assessed. The change in population of A. brasilense and R. leguminosarum in vermicompost (at 30, 35, and 40 mL/175 g substrates) with reference to storage period showed highly significant negative correlation (P < 0.001). The total microbial population in A. brasilense and R. leguminosarum inoculated vermicompost was high during initial phases of storage and then total microbial population declined towards the end. The inoculum level of A. brasilense and R. leguminosarum at 35 mL per 175 g vermibed substrate is sufficient to maintain 1 × 10 7 viable cells up to 160 days after ther harvesting of vermicompost. The inoculum of these two biofertilizer organisms into vermibed on the 30th day showed increased survival rate and, hence, the optimized inoculation of 35 mL of inoculum per 175 g substrate on the 30th day of vermicomposting is helpful for the maintenance of sufficient viable population for more than five months in the enriched vermicompost.

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Enriching vermicompost by nitrogen fixing and phosphate solubilizing bacteria

Cited by 119 publications

References 4 publications

Effect of vermicompost and chemical nitrogen fertilizer application on the various functioning of maize seeds

Effect of vermicompost and chemical nitrogen fertilizer application on the various functioning of maize seeds

Pseudomonas rhizosphaerae sp. nov., a novel species that actively solubilizes phosphate in vitro

Microbial Enrichment of Vermicompost

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