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Biofertilizers

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Natarajan Mathimaran – One of the best experts on this subject based on the ideXlab platform.

  • improving crop yield and nutrient use efficiency via biofertilization a global meta analysis
    Frontiers in Plant Science, 2018
    Co-Authors: Lukas Schutz, Natarajan Mathimaran, Andreas Gattinger, Matthias Meier, Adrian Muller, Thomas Boller, Paul Mader

    Abstract:

    The application of microbial inoculants (Biofertilizers) is a promising technology for future sustainable farming systems in view of rapidly decreasing phosphate stocks and the need to more efficiently use available nitrogen (N). Various microbial taxa are currently used as Biofertilizers, based on their capacity to access nutrients from fertilizers and soil stocks, to fix atmospheric nitrogen, to improve water uptake or to act as biocontrol agents. Despite the existence of a considerable knowledge on effects of specific taxa of Biofertilizers, a comprehensive quantitative assessment of the performance of Biofertilizers with different traits such as phosphate solubilization and N fixation applied to various crops at a global scale is missing. We conducted a meta-analysis to quantify benefits of Biofertilizers in terms of yield increase, nitrogen and phosphorus use efficiency, based on 171 peer reviewed publications that met eligibility criteria. Major findings are: i) the superiority of biofertilizer performance in dry climates over other climatic regions (yield response: dry climate +20.0 ± 1.7%, tropical climate +14.9 ± 1.2%, oceanic climate +10.0 ± 3.7%, continental climate +8.5 ± 2.4 %); ii) meta-regression analyses revealed that yield response due to biofertilizer application was generally small at low soil P levels; efficacy increased along higher soil P levels in the order arbuscular mycorrhizal fungi (AMF), P-solubilizers and N-fixers; iii) meta-regressions showed that the success of inoculation with AMF was greater at low organic matter content and at neutral pH. Our comprehensive analysis provides a basis and guidance for proper choice and application of Biofertilizers.

Kauser A Malik – One of the best experts on this subject based on the ideXlab platform.

  • assessment of two carrier materials for phosphate solubilizing Biofertilizers and their effect on growth of wheat triticum aestivum l
    Microbiological Research, 2017
    Co-Authors: Salma Mukhtar, Izzah Shahid, Samina Mehnaz, Kauser A Malik

    Abstract:

    Abstract Biofertilizers are usually carrier-based inoculants containing beneficial microorganisms. Incorporation of microorganisms in carrier material enables easy-handling, long-term storage and high effectiveness of Biofertilizers. Objective of the present study was to assess enriched biogas sludge and soil as biofertilizer carriers on growth and yield of wheat. Six phosphate solubilizing strains were used in this study. Three phosphate solubilizing strains, 77-NS2 ( Bacillus endophyticus ), 77-CS-S1 ( Bacillus sphaericus ) and 77-NS5 ( Enterobacter aerogenes ) were isolated from the rhizosphere of sugarcane, two strains, PSB5 ( Bacillus safensis ) and PSB12 ( Bacillus megaterium ) from the rhizosphere of wheat and one halophilic phosphate solubilizing strain AT2RP3 ( Virgibacillus sp.) from the rhizosphere of Atriplex amnicola, were used as bioinoculants. Phosphate solubilization ability of these strains was checked in vitro in Pikovskaya medium, containing rock phosphate (RP) as insoluble P source, individually supplemented with three different carbon sources, i.e., glucose, sucrose and maltose. Maximum phosphate solubilization; 305.6 μg/ml, 217.2 μg/ml and 148.1 μg/ml was observed in Bacillus strain PSB12 in Pikovskaya medium containing sucrose, maltose and glucose respectively. A field experiment and pot experiments in climate control room were conducted to study the effects of biogas sludge and enriched soil based phosphorous Biofertilizers on growth of wheat. Bacillus strain PSB12 significantly increased root and shoot dry weights and lengths using biogas sludge as carrier material in climate control room experiments. While in field conditions, significant increase in root and shoot dry weights, lengths and seed weights was seen by PSB12 and PSB5 (Bacillus ) and Enterobacter strain 77-NS5 using biogas sludge as carrier. PSB12 also significantly increased both root and shoot dry weights and lengths in field conditions when used as enriched soil based inoculum. These results indicated that bacterial isolates having plant beneficial traits such as P solubilization are more promising candidates as biofertilizer when used with carrier materials.

Lukas Schutz – One of the best experts on this subject based on the ideXlab platform.

  • improving crop yield and nutrient use efficiency via biofertilization a global meta analysis
    Frontiers in Plant Science, 2018
    Co-Authors: Lukas Schutz, Natarajan Mathimaran, Andreas Gattinger, Matthias Meier, Adrian Muller, Thomas Boller, Paul Mader

    Abstract:

    The application of microbial inoculants (Biofertilizers) is a promising technology for future sustainable farming systems in view of rapidly decreasing phosphate stocks and the need to more efficiently use available nitrogen (N). Various microbial taxa are currently used as Biofertilizers, based on their capacity to access nutrients from fertilizers and soil stocks, to fix atmospheric nitrogen, to improve water uptake or to act as biocontrol agents. Despite the existence of a considerable knowledge on effects of specific taxa of Biofertilizers, a comprehensive quantitative assessment of the performance of Biofertilizers with different traits such as phosphate solubilization and N fixation applied to various crops at a global scale is missing. We conducted a meta-analysis to quantify benefits of Biofertilizers in terms of yield increase, nitrogen and phosphorus use efficiency, based on 171 peer reviewed publications that met eligibility criteria. Major findings are: i) the superiority of biofertilizer performance in dry climates over other climatic regions (yield response: dry climate +20.0 ± 1.7%, tropical climate +14.9 ± 1.2%, oceanic climate +10.0 ± 3.7%, continental climate +8.5 ± 2.4 %); ii) meta-regression analyses revealed that yield response due to biofertilizer application was generally small at low soil P levels; efficacy increased along higher soil P levels in the order arbuscular mycorrhizal fungi (AMF), P-solubilizers and N-fixers; iii) meta-regressions showed that the success of inoculation with AMF was greater at low organic matter content and at neutral pH. Our comprehensive analysis provides a basis and guidance for proper choice and application of Biofertilizers.