Impact of the use of biofertilizers on cotton (<b><i>Gossypium hirsutum</i></b>) crop under irrigated agro-ecosystem

Prof., Neeru Narula; Saharan, Baljeet Singh; Kumar, Vivek; Bhatia, Ranjana; Bishnoi, LK; Lather, B. P. S.; Lakshminarayana, K.

doi:10.1080/03650340400029275

Cited by 22 publications

(6 citation statements)

References 8 publications

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“…Among SynCom also possible that, while SynCom is still effective, plants growth parameter stabilised at later stage because plant invested heavily in reproductive structures (Berg et al, 2016;Paul et al, 2011;Pereg & McMillan, 2015) The second explanation is supported by increased flower numbers and seed yields in this study. Our results are consistent with earlier findings (Gomathy et al, 2008;Liu et al, 2022;Narula et al, 2005), which reported the impact of PGPR on flowers and yield.…”

Section: Structural Equation Modellingsupporting

confidence: 94%

Synthetic community improves crop performance and alters rhizosphere microbial communities

Kaur

Egidi

Qiu

et al. 2022

J of Sust Agri & Env

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Introduction Harnessing synthetic communities (SynCom) of plant growth‐promoting (PGP) microorganisms is considered a promising approach to improve crop fitness and productivity. However, biotic mechanisms that underpin improved plant performance and the effects of delivery mode of synthetic community are poorly understood. These are critical knowledge gaps that constrain field efficacy of SynCom and hence large‐scale adoption by the farming community. Material & Methods In this study, a SynCom of four PGP microbial species was constructed and applied to either as seed dressing (treatment T1, applied at the time of sowing) or to soil (treatment T2, applied in soil at true leaf stage) across five different cotton (Gossypium hirsutum) cultivars. The impact of SynCom on plant growth, rhizosphere microbiome and soil nutrient availability, and how this was modified by plant variety and mode of applications, was assessed. Results Results showed that the seed application of SynCom had the strongest positive impact on overall plant fitness, resulting in higher germination (14.3%), increased plant height (7.4%) and shoot biomass (5.4%). A significant increase in the number of flowers (10.4%) and yield (8.5%) was also observed in T1. The soil nitrate availability was enhanced by 28% and 55% under T1 and T2, respectively. Results further suggested that SynCom applications triggered enrichment of members from bacterial phyla Actinobacteria, Firmicutes and Cyanobacteria in the rhizosphere. A shift in fungal communities was also observed, with a significant increase in the relative abundance of fungi from phyla Chytridiomycota and Basidiomycota in SynCom treatments. A structural equation model suggested that SynCom directly increased crop productivity but also indirectly via impacting the alpha diversity of bacteria. Conclusion Overall, this study provides mechanistic evidence that SynCom applications can shift rhizosphere microbial communities and improve soil fertility, plant growth, and crop productivity, suggesting that their use could contribute toward sustainable increase in farm productivity.

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Section: Structural Equation Modellingsupporting

confidence: 94%

Synthetic community improves crop performance and alters rhizosphere microbial communities

Kaur

Egidi

Qiu

et al. 2022

J of Sust Agri & Env

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“…The use of bio-fertilizers, which are applied to soil or plants, is an effective approach to minimize the application of chemical fertilizers and increase food safety for human consumption [16,17,19]. Bacillus cereus is a potassium solubilizing bacterium (KSB) and has been used in several studies to increase the solubility of K. In addition, B. cereus enhances plant growth via increasing nutrient uptake and production of plant hormones [16,[20][21][22][23]. Although the role of KSB in increasing nutrient uptake and plant growth is known for several field crops, its role in the rate of K release in sandy soils still needs additional research.…”

Section: Introductionmentioning

confidence: 99%

Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils

et al. 2022

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Arid degraded soils have a coarse texture and poor organic matter content, which reduces the activity of microorganisms and soil enzymes, and thus the soil quality, plant yield and quality decrease. Potassium solubilizing bacteria (KSB) have been suggested to increase the activity of soil enzymes and increase the release of potassium from natural K-feldspar in the arid degraded soil, and thus potentially reduce the rates of the application of chemical fertilizers. Field studies were conducted for three successive growing seasons in an organic farming system to investigate the effects of K-feldspar and KSB (Bacillus cereus) on K release, soil fertility, and fruit yield of mango plants (Mangifera indica L.). The maximum growth of mango plants was found in the treatments inoculated with KSB. KSB increased soil available N, P, K, and the activity of dehydrogenase and alkaline phosphatase enzymes by 10, 7, 18, 54, and 52%, respectively. KSB increased the fruit yield of mango by 23, 27, and 23% in the first, second, and third growing seasons, respectively. The partial (up to 50%) substitution of chemical K-fertilizer with K-feldspar gave fruit yield and quality very close to that fertilized with the full chemical K-fertilizer. The release rate of K (over all the treatments) varied between 0.18 and 0.64 mg kg−1 of soil per day. KSB significantly increased the K release rate. The application of chemical K-fertilizer gave the highest K release, while substitution with K-feldspar reduced the release of K. Natural K-feldspar contains 8.2% K but is poorly soluble when applied alone. KSB increased the soil quality parameters and enhanced the growth and quality of mango fruit. The fruit yield of mango, under KSB inoculation and fertilization with different K sources, ranged between 9.14 to 17.14 t ha−1. The replacement of 50% of chemical K-fertilizer with natural K-feldspar caused a decrease in the fruit yield by 17, 8, and 2.7% in the first, second, and third years, respectively. The substitution of chemical K-fertilizer with K-feldspar up to 50% with KSB is a good strategy to reduce the excessive use of chemical K-fertilizer. B. cereus and natural K-feldspar have the potential to improve soil health and mango plant productivity in low fertile arid soils.

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“…Positive results were also observed in cotton and wheat varieties when inoculated with P-solubilizing A. chroococcum with greater NPK uptake (Narula et al 2005 ).…”

Section: Phosphate-solubilizing Bacteria (Psb)mentioning

confidence: 83%

Phosphate-Solubilizing Microorganisms: A Critical Review

Kishore

Pindi

Reddy

2015

Plant Biology and Biotechnology

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Nitrogen (N), phosphorus (P) and potassium (K) are the three important nutrients required by any plant for healthy growth. Among these, P stands as the second limiting nutrient next to nitrogen. Even though different forms of P are abundantly present in soil, its availability in plant-utilizable form is limited. This defi ciency is usually compensated by adding chemical fertilizers. However, the chemical fertilizers are expensive and are not eco-friendly. Nonjudicious and irregular usage for a long time leads to decreased soil activity and soil microfl ora leading to imbalance in equilibrium. Usage of microorganisms to augment the P availability is the best alternative. Phosphate-solubilizing microorganisms (PSMs) when applied in appropriate numbers into the rhizosphere help the plant by supplementing P in plant-utilizable form by several mechanisms. In addition, few PSMs also possess added features as plant growth-promoting rhizobacteria (PGPR) and biocontrol agents conferring protection from phytopathogens. Improvement in soil characters by PSMs is an added advantage. Recent advances in technology paved the way for modifying PSMs with desired qualities. In spite of these, several areas in this area of research suffer different lacunae. Efforts are being made to discuss all major areas pertaining to PSMs in the present review.

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Impact of the use of biofertilizers on cotton (Gossypium hirsutum) crop under irrigated agro-ecosystem

Cited by 22 publications

References 8 publications

Synthetic community improves crop performance and alters rhizosphere microbial communities

Synthetic community improves crop performance and alters rhizosphere microbial communities

Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils

Phosphate-Solubilizing Microorganisms: A Critical Review

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