scholarly journals Perspectives for Biochar as a vehicle for inoculation of phosphate solubilizing bacteria: a review

2022 ◽  
Vol 11 (1) ◽  
pp. e36211124885
Author(s):  
Rafaela Felix da França ◽  
Erika Valente de Medeiros ◽  
Renata Oliveira Silva ◽  
Ronaldo Anderson da Silva Fausto ◽  
Carlos Alberto Fragoso de Souza ◽  
...  
Keyword(s):  
Field Experiments ◽  
Agricultural Soils ◽  
Low Cost ◽  
Crop Productivity ◽  
Vital Role ◽  
Future Research ◽  
Phosphate Solubilizing Bacteria ◽  
Phosphate Fertilizers ◽  
Phosphate Solubilizing ◽  
Soil Constituents

Phosphorus (P) plays a vital role in many aspects of plant growth and development. The low amount of available P in agricultural soils reduces crop productivity and phosphate fertilizers are often applied. However, due to the high affinity of P for the soil constituents, the availability of this element becomes limited to plants. Thus, alternative, ecological, and low-cost techniques have been studied to improve P acquisition by crops. Microorganisms able to solubilize P, mainly phosphate-solubilizing bacteria (PSB) have stood out, since they offer an approach to overcome P scarcity by their introduction in agricultural systems via inoculants. In this paper, we showed the potential of P-solubilizing microorganisms and their mechanisms of action, the potential of different inoculation vehicles, also highlighting the biochar as a viable biological product for production of inoculants. The combined effects of these factors (PSB and biochar) add several benefits to the soil-plant system. Results from this review demonstrate that biochar amendments have great potential as a vehicle for inoculation of PSB. However, studies of biochar combined with PSB is still incipient. Future research should focus efforts on exploring highly efficient strains, optimizing conditions, and assessing several sources of waste for production of biochar and their efficiency in field experiments.

scholarly journals Isolation and characterization of phosphate solubilizing bacteria from agricultural soils for a potential use in cultivating Capsicum frutescens

2020 ◽  
Vol 10 (2) ◽  
pp. 5161-5173
Keyword(s):  
Plant Growth ◽  
Agricultural Soils ◽  
Pot Experiment ◽  
Available Phosphorus ◽  
Phosphate Solubilizing Bacteria ◽  
Capsicum Frutescens ◽  
Isolation And Characterization ◽  
Insoluble Form ◽  
Phosphate Solubilizing

Phosphorus (P) is one of the essential macronutrients needed for the plant growth, other than nitrogen and potassium. Most phosphorus remains as insoluble form in soils and the plants only can uptake the phosphorus nutrient in soluble forms. Phosphate solubilizing bacteria (PSB) dissolves the phosphorus and make it available for plants. In this study, Soil samples were collected and screened for PSB on PK medium. PSB colonies with the highest phosphate solubilization ability were chosen and used for studying its rhizosphere effect on Capsicum frutescens by pot experiment.. It was evidenced that selected PSB strain could solubilize phosphate in PK medium and modified PK broth. Besides, it provided available phosphorus for plants and enhanced the plant growth in pot experiment.

Abundance and ribotypes of phosphate-solubilizing bacteria in Argentinean agricultural soils under no-till management

2015 ◽  
Vol 65 (3) ◽  
pp. 1667-1678 ◽  
Author(s):  
Leticia A. Fernández ◽  
Betina Agaras ◽  
Luis G. Wall ◽  
Claudio Valverde
Keyword(s):  
Agricultural Soils ◽  
Phosphate Solubilizing Bacteria ◽  
No Till ◽  
Phosphate Solubilizing

scholarly journals Isolasi Rhizobakteri dan Pengaruh Aplikasinya dengan Pupuk N-P terhadap Mutu Benih dan Pertumbuhan Bibit Tetua Betina Jagung

2018 ◽  
Vol 45 (3) ◽  
pp. 255
Author(s):  
Pitri Ratna Asih ◽  
Memen Surahman ◽  
Dan Giyanto
Keyword(s):  
Field Experiments ◽  
Seed Quality ◽  
Female Parent ◽  
Dry Weight ◽  
Hybrid Seed ◽  
Phosphate Solubilizing Bacteria ◽  
Isolation And Identification ◽  
Seed Field ◽  
P Fertilizer ◽  
Phosphate Solubilizing

Increased productivity of maize can be done with the use of high quality seeds from improved varieties such as hybrid seed. The objectives of this study were Increasing productivity of maize female parent is important in order to reduce the price of hybrid seed. The objectives of this study were to determine the nitrogen fixing bacteria compatible with phosphate solubilizing bacteria (PSB), and using those bacteria to increase physiological seed quality and seedling growth of maize female parent. The research consisted of laboratory and field experiments. Laboratory experiment for the isolation and identification of rhizobacteria resulted in 25 Azotobacter and 29 Actinomycetes non-pathogenic isolates capable of fixing nitrogen and PSB selected for compatibility tests were AB3, B28, P12, P14, P24, and P31. The compatibility test showed 25 pairs of BPF with Azotobacter and 16 pairs of BPF with Actinomycetes were mutually compatible. The BPF pair with Azotobacter or Actinomycetes P24-AzL7, P24-AzL9, B28-AcCKB4, P24-AcCKB9, P24-AcCKB20, and P24-AcCKW5 were able to increase the vigor index of hybrid maize female parent seed. Field experiment was arranged in a split plot design with three replications. The main plot was dosage of N-P fertilizer (0%, 25%, 50%, 75%, and 100% of recommendation dosage), and the subplot was 12 rhizobacteria treatments selected from 25 compatible pairs of BPF with Azotobacter and 16 pairs of BPF with Actinomycetes and 1 control. The application of compatible pairs of bacteria had a significant effect on plant height, the number of leaves at 3 and 4 weeks after planting and plant dry weight. However, the best treatment i.e. B28-AcCKB4 was not significantly different with the nutrient broth treatment (as control).<br /><br /><br />

scholarly journals Multi-Omics Reveal the Efficient Phosphate-Solubilizing Mechanism of Bacteria on Rocky Soil

2021 ◽  
Vol 12 ◽  
Author(s):  
Yanqiang Ding ◽  
Zhuolin Yi ◽  
Yang Fang ◽  
Sulan He ◽  
Yuming Li ◽  
...  
Keyword(s):  
Gluconic Acid ◽  
Agricultural Development ◽  
Tricarboxylic Acid Cycle ◽  
Acid Synthesis ◽  
Available Phosphorus ◽  
Phosphate Solubilizing Bacteria ◽  
Phosphate Fertilizers ◽  
Plant Growth Promoting ◽  
Rocky Soil ◽  
Phosphate Solubilizing

Phosphate-solubilizing bacteria (PSB) can alleviate available phosphorus (AP)-deficiency without causing environmental pollution like chemical phosphate fertilizers. However, the research and application of PSB on the barren rocky soil is very rare. We screened six PSB from sweetpotato rhizosphere rocky soil. Among them, Ochrobactrum haematophilum FP12 showed the highest P-solubilizing ability of 1,085.00 mg/L at 7 days, which was higher than that of the most reported PSB. The assembled genome of PSB FP12 was 4.92 Mb with P-solubilizing and plant growth-promoting genes. In an AP-deficient environment, according to transcriptome and metabolomics analysis, PSB FP12 upregulated genes involved in gluconic acid synthesis and the tricarboxylic acid cycle, and increased the concentration of gluconic acid and malic acid, which would result in the enhanced P-solubilizing ability. Moreover, a series of experiments in the laboratory and field confirmed the efficient role of the screened PSB on significantly increasing AP in the barren rocky soil and promoting sweetpotato yield. So, in this study, we screened highly efficient PSB, especially suitable for the barren rocky soil, and explored the P-solubilizing mechanism. The research will reduce the demand for chemical phosphate fertilizers and promote the environment-friendly agricultural development.

scholarly journals Keanekaragaman Mikrob Fungsional Rizosfer Nanas dengan Berbagai Tingkat Produktivitas

2020 ◽  
Vol 25 (4) ◽  
pp. 584-591
Author(s):  
Aditya Dyah Utami ◽  
Suryo Wiyono ◽  
Rahayu Widyastuti ◽  
Priyo Cahyono
Keyword(s):  
Phytophthora Cinnamomi ◽  
Disease Incidence ◽  
Crop Productivity ◽  
Total Density ◽  
Phosphate Solubilizing Bacteria ◽  
Vegetative Phase ◽  
Randomized Sampling ◽  
Chitinolytic Bacteria ◽  
Phosphate Solubilizing ◽  
Potassium Solubilizing Bacteria

Functional microbes of rhizosphere play important roles in nutrient transformation and controlling disease as well as in supporting plant growth and development. However, there is no study on the role of functional microbes on pineapple productivity. The purpose of this study was to investigate the abundance and diversity of soil functional microbes at different growth phases at two levels of productivity and their correlations to disease incidence. The research process included sampling of pineapple rhizospheric soil from vegetative and generative phases pineapples at low and high plant productivity sites, observations of disease incidence, and isolations of functional microbes. Functional groups of bacteria were Azotobacter, phosphate-solubilizing bacteria, potassium-solubilizing bacteria, antibiotics-producing bacteria, IAA-producing bacteria, and chitinolytic bacteria. The soil sampling method was simple randomized sampling at 6 locations with an area of each location ± 5 ha with a depth of 20 cm. Rhizosphere were taken in plants grown in high productivity area (>60tons/ha) and low productivity area (<60 tons/ha) in vegetative and generative phases. The results showed that potassium-solubilizing bacteria, chitinolytic bacteria, and IAA-producing bacteria were more abundant during the generative phase compared to those during vegetative phase. While Azotobacter, phosphate-solubilizing bacteria, and antibiotic-producing bacteria were more predominant during vegetative phase at various crop productivy. Total density of microbes was higher in soil with high crop productivity than that in soil with low crop productivity. The abundance of chitinolytic bacteria and IAA-producing bacteria had negative correlation with disease caused by Erwinia chrysanthemi and Phytophthora cinnamomi. Keywords: chitinolytic bacteria, growth phase, IAA, pineapple disease

Effect of integrated nutrient management on productivity, soil fertility and economics of blackgram (Vigna mungo) varieties under rainfed condition

2015 ◽  
Author(s):  
B. S. Meena ◽  
Baldev Ram
Keyword(s):  
Seed Yield ◽  
Management Practices ◽  
Field Experiments ◽  
Nutrient Management ◽  
Cost Ratio ◽  
Phosphate Solubilizing Bacteria ◽  
Net Return ◽  
Benefit Cost Ratio ◽  
Phosphate Solubilizing ◽  
Benefit Cost

Field experiments were conducted during kharif seasons on 7th and 10th July of 2010 and 2011 respectively to find out suitable nutrient management practices for blackgram varieties at farmer's field at Humerhedi, Kota district. The treatments consisted of 5 blackgram varieties (viz. PU 31, PU 30, KU 96-3, T 9 and Krishna) and 9 nutrient management practices (viz. T1: No application of NP, T2: P (17.2 kg/ha as farmer's practice), T3: NP (20:17.2 kg/ha as RDF), T4: RDF+16.6 kg K/ha, T5: RDF+16.6 kg K+20 kg S/ha, T6: RDF+16.6 kg K+20 kg S+3 kg Zn/ha, T7: RDF+16.6 kg K+20 kg S+3 kg Zn/ha + Rhizobium, T8: RDF+16.6 kg K+20 kg S+3 kg Zn/ha+Rhizobium (RZ) +Phosphate solubilizing bacteria (PSB) and T9: RDF+16.6 kg K+20 kg S+3 kg Zn/ha + RZ + PSB + 5 t FYM/ha. Application of RDF + 16.6 kg K + 20 kg S + 3 kg Zn /ha along with seed inoculation with Rhizobium + PSB recorded significantly taller plants, higher number of branches/plant, pods/plant, higher seed yield, net return and benefit: cost ratio over control, farmer practice, RDF, RDF + 16.6 kg K/ha and RDF + 16.6 kg K/ha+20 kg S/ha but at par with rest of treatments viz. RDF+16.6 kg K+20 kg S+3 kg Zn/ha + Rhizobium,RDF+16.6 kg K+20 kg S+3 kg Zn/ha+Rhizobium + Phosphate solubilizing bacteria and RDF+16.6 kg K+20 kg S+3 kg Zn/ha + RZ + PSB + 5 t FYM/ha. Whereas application of RDF + 16.6 kg K + 20 kg S + 3 kg Zn/ha + Rhizobium + PSB + 5 t FYM/ha significantly recorded higher available organic carbon, nitrogen, phosphorus, potassium, sulphur and zinc contents in the soil over rest of the treatments. Among the genotypes, 'KU 96-3' recorded significantly higher branches/plant, pods/plant, seeds/pod, seed index, seed yield, net return and B: C ratio.

scholarly journals Plant- and microbial-based mechanisms to improve the agronomic effectiveness of phosphate rock: a review

2006 ◽  
Vol 78 (4) ◽  
pp. 791-807 ◽  
Author(s):  
Melissa M. Arcand ◽  
Kim D. Schneider
Keyword(s):  
Phosphate Rock ◽  
Agricultural Soils ◽  
Low Cost ◽  
Soil Phosphorus ◽  
Future Research ◽  
Available Phosphorus ◽  
Limiting Factor ◽  
Agronomic Effectiveness ◽  
Ongoing Research ◽  
Organic Acid Production

Deficiency in plant-available phosphorus is considered to be a major limiting factor to food production in many agricultural soils. Mineral resources are necessary to restore soil phosphorus content. In regions where conventional fertilizers are not used due to cost limitations or to mitigate adverse environmental effects, local sources of phosphate rock are being increasingly recognized for potential use as alternative phosphorus fertilizers. The main obstacle associated with using directly applied ground phosphate rock is that the phosphate released is often unable to supply sufficient plant-available phosphorus for crop uptake. Plantand microbial-based mechanisms are low-cost, appropriate technologies to enhance the solubilization and increase the agronomic effectiveness of phosphate rock. Common mechanisms of phosphate rock dissolution including proton and organic acid production will be reviewed for both plants and microorganisms. This review will also address possibilities for future research directions and applications to agriculture, as well as highlight ongoing research at the University of Guelph, Guelph, Canada.

scholarly journals Co-Inoculation of Mesorhizobium ciceri with Either Bacillus sp. or Enterobacter aerogenes on Chickpea Improves Growth and Productivity in Phosphate-Deficient Soils in Dry Areas of a Mediterranean Region

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 571
Author(s):  
Imane Benjelloun ◽  
Imane Thami Alami ◽  
Mohamed El Khadir ◽  
Allal Douira ◽  
Sripada M. Udupa
Keyword(s):  
Field Experiments ◽  
Enterobacter Aerogenes ◽  
Dry Weight ◽  
Phosphate Solubilizing Bacteria ◽  
Bacillus Sp ◽  
Mesorhizobium Ciceri ◽  
Shoot Dry Weight ◽  
Combined Application ◽  
Dry Areas ◽  
Phosphate Solubilizing

Biological nitrogen fixation requires a large amount of phosphorus (P). However, most of the soils are P-deficient and the extensive use of P- chemical fertilizers constitute a serious threat to the environment. In this context, two field experiments were carried out to investigate the effect of co-inoculation of Mesorhizobium ciceri with phosphate solubilizing bacteria (PSB), Bacillus sp., and Enterobacter aerogenes, on chickpea as an alternative to chemical nitrogen (N) and phosphorous fertilizers in P-deficient soils in dry areas of Morocco. The results revealed that combined inoculation of chickpea with rhizobia and PSB showed a significant enhancement of chickpea nodulation, biomass production, yields and N, P, and protein content in grains as compared to single inoculation or single application of N or P. A significantly higher increase was obtained by inoculating chickpea with Mesorhizobium sp. MA72 combined with E. aerogenes P1S6. This combination allowed an enhancement of more than 270% in nodulation, 192% in shoot dry weight and 242% in grain yield. The effect of this combination was equivalent to the effect of combined application of N and P fertilizers. Formulation of biofertilizers based on tasted strains could be used for chickpea co-inoculation in P-deficient soils for an eco-friendly sustainable production of chickpea.

scholarly journals Using Rhizosphere Phosphate Solubilizing Bacteria to Improve Barley (Hordeum vulgare) Plant Productivity

2021 ◽  
Vol 9 (8) ◽  
pp. 1619
Author(s):  
Ana Ibáñez ◽  
Alba Diez-Galán ◽  
Rebeca Cobos ◽  
Carla Calvo-Peña ◽  
Carlos Barreiro ◽  
...  
Keyword(s):  
Dry Weight ◽  
Crop Productivity ◽  
Barley Plant ◽  
Phosphate Solubilizing Bacteria ◽  
Microbial Inoculants ◽  
Total Phosphorous ◽  
Pot Trials ◽  
Growth Promoting ◽  
Phosphate Solubilizing ◽  
Vulgare Plant

On average less than 1% of the total phosphorous present in soils is available to plants, making phosphorous one of the most limiting macronutrients for crop productivity worldwide. The aim of this work was to isolate and select phosphate solubilizing bacteria (PSB) from the barley rhizosphere, which has other growth promoting traits and can increase crop productivity. A total of 104 different bacterial isolates were extracted from the barley plant rhizosphere. In this case, 64 strains were able to solubilize phosphate in agar plates. The 24 strains exhibiting the highest solubilizing index belonged to 16 different species, of which 7 isolates were discarded since they were identified as putative phytopathogens. The remaining nine strains were tested for their ability to solubilize phosphate in liquid medium and in pot trials performed in a greenhouse. Several of the isolated strains (Advenella mimigardefordensis, Bacillus cereus, Bacillus megaterium and Burkholderia fungorum) were able to significantly improve levels of assimilated phosphate, dry weight of ears and total starch accumulated on ears compared to non-inoculated plants. Since these strains were able to increase the growth and productivity of barley crops, they could be potentially used as microbial inoculants (biofertilizers).

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