Evaluating the feasibility of using lignin–alginate beads with starch additive for entrapping and releasing <i>Rhizobium</i> spp.

Adjuik, Toby A.; Nokes, Sue E.; Montross, Michael D.

doi:10.1002/app.53181

Cited by 8 publications

(4 citation statements)

References 63 publications

(139 reference statements)

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“…When alginate was amended in the liquid formulation of Azospirillum, it enhanced cell viability and stability at high temperatures [24]. The lignitealginate based beads with hydrogel or starch was developed as Rhizobium biofertilizer formulation [25]. In the present work, all the selected polymers (HPMC, PVA, three different polymers from seaweeds) showed high viability of nitrogen-fixing bacterium, Azospirillum, and phosphorus solubilizing bacterium, Bacillus megaterium, up to 60 days of incubation.…”

Section: Discussionmentioning

confidence: 64%

Evaluation of Suitable Polymers for the Development of High-Concentrated Liquid Biofertilizers

Swaminathan,

Anandham,

Paranidharan

et al. 2023

IJPSS

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An improvement in the present liquid formulation of biofertilizer is essential to expand its shelf life and enhance the bioefficacy potential of the inoculated crops. Here, we screened ten different water-soluble polymers for their feasibility as cell protectants in liquid biofertilizers for the duration of three months. The physio-chemical properties and Escherichia coli survival assay experiments identified five potential polymers: hydroxypropyl methylcellulose, polyvinyl alcohol, and natural polymers extracted from seaweed, red algae, and brown algae. These five polymers' aqueous solutions comply with the standard parameters of liquid biofertilizers. Further, these polymers were compared with standard liquid biofertilizer diluting medium (phosphate buffer with glycerol) for the shelf life of two biofertilizer strains, viz., Azospirillum lipoferum (Az204) and Bacillus megaterium var. phosphaticum (Pb1). All the polymers had high cell viability up to 60 days after incubation. In conclusion, the results suggest that these polymers could be effective encapsulating agents to improve the quality of liquid biofertilizers.

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Section: Discussionmentioning

confidence: 64%

Evaluation of Suitable Polymers for the Development of High-Concentrated Liquid Biofertilizers

Swaminathan,

Anandham,

Paranidharan

et al. 2023

IJPSS

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“…Its production includes mixing PGPR suspension in a 2:1 ratio with a solution of 1.5% sodium alginate, 3% starch, and 4% bentonite ( Akhtar et al, 2022 ; Pour et al, 2022 ). After washing the microcapsules in sterile distilled water, the mixture is covered with the crosslinking calcium chloride solution ( Adjuik et al, 2022 ).…”

Section: Nanoencapsulation Of Plant Probiotics: How Can It Shape Crop...mentioning

confidence: 99%

Synergistic impact of nanomaterials and plant probiotics in agriculture: A tale of two-way strategy for long-term sustainability

et al. 2023

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Modern agriculture is primarily focused on the massive production of cereals and other food-based crops in a sustainable manner in order to fulfill the food demands of an ever-increasing global population. However, intensive agricultural practices, rampant use of agrochemicals, and other environmental factors result in soil fertility degradation, environmental pollution, disruption of soil biodiversity, pest resistance, and a decline in crop yields. Thus, experts are shifting their focus to other eco-friendly and safer methods of fertilization in order to ensure agricultural sustainability. Indeed, the importance of plant growth-promoting microorganisms, also determined as “plant probiotics (PPs),” has gained widespread recognition, and their usage as biofertilizers is being actively promoted as a means of mitigating the harmful effects of agrochemicals. As bio-elicitors, PPs promote plant growth and colonize soil or plant tissues when administered in soil, seeds, or plant surface and are used as an alternative means to avoid heavy use of agrochemicals. In the past few years, the use of nanotechnology has also brought a revolution in agriculture due to the application of various nanomaterials (NMs) or nano-based fertilizers to increase crop productivity. Given the beneficial properties of PPs and NMs, these two can be used in tandem to maximize benefits. However, the use of combinations of NMs and PPs, or their synergistic use, is in its infancy but has exhibited better crop-modulating effects in terms of improvement in crop productivity, mitigation of environmental stress (drought, salinity, etc.), restoration of soil fertility, and strengthening of the bioeconomy. In addition, a proper assessment of nanomaterials is necessary before their application, and a safer dose of NMs should be applicable without showing any toxic impact on the environment and soil microbial communities. The combo of NMs and PPs can also be encapsulated within a suitable carrier, and this method aids in the controlled and targeted delivery of entrapped components and also increases the shelf life of PPs. However, this review highlights the functional annotation of the combined impact of NMs and PPs on sustainable agricultural production in an eco-friendly manner.

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“…Rhizobial cells can be immobilized and released using lignin-alginate beads with a starch addition, according to some studies. Compared to merely using alginate beads, starch addition boosted the survival of Rhizobium cells from 61% to 84% [ 6 ]. Due to its outstanding delayed-release qualities, lignin-based slow-release fertilizer has been the subject of numerous investigations in recent years.…”

Section: Introductionmentioning

confidence: 99%

Effect of varying thickness properties of the slow release fertilizer films on morphology, biodegradability, urea release, soil health, and plant growth

et al. 2023

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Green biomass is a renewable and biodegradable material that has the potential use to trap urea to develop a high-efficiency urea fertilizer for crops’ better performance. Current work examined the morphology, chemical composition, biodegradability, urea release, soil health, and plant growth effects of the SRF films subjected to changes in the thickness of 0.27, 0.54, and 1.03 mm. The morphology was examined by Scanning Electron Microscopy, chemical composition was analyzed by Infrared Spectroscopy, and biodegradability was assessed through evolved CO2 and CH4 quantified through Gas Chromatography. The chloroform fumigation technique was used for microbial growth assessment in the soil. The soil pH and redox potential were also measured using a specific probe. CHNS analyzer was used to calculate the total carbon and total nitrogen of the soil. A plant growth experiment was conducted on the Wheat plant (Triticum sativum). The thinner the films, the more they supported the growth and penetration of the soil’s microorganisms mainly the species of fungus possibly due to the presence of lignin in films. The fingerprint regions of the infrared spectrum of SRF films showed all films in soil changed in their chemical composition due to biodegradation but the increase in the thickness possibly provides resistance to the films’ losses. The higher thickness of the film delayed the rate and time for biodegradation and the release of methane gas in the soil. The 1.03 mm film (47% in 56 days) and 0.54 mm film (35% in 91 days) showed the slowest biodegradability as compared to the 0.27 mm film with the highest losses (60% in 35 days). The slow urea release is more affected by the increase in thickness. The Korsymer Pappas model with release exponent value of < 0.5 explained the release from the SRF films followed the quasi-fickian diffusion and also reduced the diffusion coefficient for urea. An increase in the pH and decrease in the redox potential of the soil is correlated with higher total organic content and total nitrogen in the soil in response to amending SRF films with variable thickness. Growth of the wheat plant showed the highest average plant length, leaf area index and grain per plant in response to the increase in the film’s thickness. This work developed an important knowledge to enhance the efficiency of film encapsulated urea that can better slow the urea release if the thickness is optimized.

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Evaluating the feasibility of using lignin–alginate beads with starch additive for entrapping and releasing Rhizobium spp.

Cited by 8 publications

References 63 publications

Evaluation of Suitable Polymers for the Development of High-Concentrated Liquid Biofertilizers

Evaluation of Suitable Polymers for the Development of High-Concentrated Liquid Biofertilizers

Synergistic impact of nanomaterials and plant probiotics in agriculture: A tale of two-way strategy for long-term sustainability

Effect of varying thickness properties of the slow release fertilizer films on morphology, biodegradability, urea release, soil health, and plant growth

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