Bacterial impregnation of mineral fertilizers improves yield and nutrient use efficiency of wheat

Ahmad, Shakeel; Imran, Muhammad; Hussain, Sabir; Mahmood, Sajid; Hussain, Azhar; Hasnain, Muhammad

doi:10.1002/jsfa.8228

Cited by 31 publications

(21 citation statements)

References 42 publications

(66 reference statements)

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“…Another study based on pot experiments demonstrated that bacterially impregnating DAP and urea granules with the PGPB Bacillus sp. strain (KAP6) (slurry of strain and compost) enhanced growth, yield, photosynthetic rate, and nutrient use efficiency of wheat supplied with N-containing fertilizers such as urea and DAP ( Ahmad et al, 2017 ). Nevertheless, at a large scale, there is no evidence of such interesting strategy of impregnating mineral fertilizers with plant growth-promoting bacteria, and particularly for NF bacteria and PSM that have been attracting worldwide attention.…”

Section: Synergistic Use Of Mineral P and N 2 – Fimentioning

confidence: 99%

“…Indeed, while mineral fertilizers provide high amounts of nutrients to plants, biological resources (i.e., microbial inoculants) are key components of such IPNMS wherein both resources may synergistically co-interact to improve nutrient compositions and biological functions that plants need to grow stronger. In this regards, a limited number of studies have focused on the positive and complementary combinatory effect of using beneficial microbes for increasing the efficiency in use of mineral fertilizers ( Vargas et al, 2000 ; Shata et al, 2007 ; Yasari et al, 2009 ; Shoghi-Kalkhoran et al, 2013 ; Ahmad et al, 2017 ). For instance, co-inoculation with Sinorhizobium meliloti RMP and Pseudomonas aeruginosa GRC2 improved growth and yield of Brassica juncea supplied with urea and diammonium phosphate (DAP) fertilizers ( Maheshwari et al, 2010 ).…”

Section: Introductionmentioning

confidence: 99%

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Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

et al. 2018

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Tomorrow’s agriculture, challenged by increasing global demand for food, scarcity of arable lands, and resources alongside multiple environment pressures, needs to be managed smartly through sustainable and eco-efficient approaches. Modern agriculture has to be more productive, sustainable, and environmentally friendly. While macronutrients such as nitrogen (N), phosphorus (P), potassium (K), and sulfur (S) supplied by mineral fertilizers are vital to crop production, agriculturally beneficial microorganisms may also contribute directly (i.e., biological N2 fixation, P solubilization, and phytohormone production, etc.) or indirectly (i.e., antimicrobial compounds biosynthesis and elicitation of induced systemic resistance, etc.) to crop improvement and fertilizers efficiency. Microbial-based bioformulations that increase plant performance are greatly needed, and in particular bioformulations that exhibit complementary and synergistic effects with mineral fertilization. Such an integrated soil fertility management strategy has been demonstrated through several controlled and non-controlled experiments, but more efforts have to be made in order to thoroughly understand the multiple functions of beneficial microorganisms within the soil microbial community itself and in interaction with plants and mineral resources. In fact, the combined usage of microbial [i.e., beneficial microorganisms: N2-fixing (NF), P-solubilizing, and P mobilizing, etc.] and mineral resources is an emerging research area that aims to design and develop efficient microbial formulations which are highly compatible with mineral inputs, with positive impacts on both crops and environment. This novel approach is likely to be of a global interest, especially in most N- and P-deficient agro-ecosystems. In this review, we report on the importance of NF bacteria and P solubilizing/mobilizing microbes as well as their interactions with mineral P fertilization in improving crop productivity and fertilizers efficiency. In addition, we shed light on the interactive and synergistic effects that may occur within multi-trophic interactions involving those two microbial groups and positive consequences on plant mineral uptake, crop productivity, and resiliency to environmental constraints. Improving use of mineral nutrients is a must to securing higher yield and productivity in a sustainable manner, therefore continuously designing, developing and testing innovative integrated plant nutrient management systems based on relevant biological resources (crops and microorganisms) is highly required.

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Section: Synergistic Use Of Mineral P and N 2 – Fimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

et al. 2018

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“…Microorganisms that promote plant growth may be worth evaluating as a prospective tool to improve fertilizer use efficiency [11] [12] [13] [14] [15]. Plant growth-promoting rhizobacteria (PGPR) are free-living microbes that live on or around the roots [16] and that stimulate plant growth and enhance root development and architecture [17] [18] [19] [20].…”

Section: Introductionmentioning

confidence: 99%

Effect of Plant Growth-Promoting Rhizobacteria at Various Nitrogen Rates on Corn Growth

Lin¹,

Watts²,

Kloepper³

et al. 2019

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Plant growth-promoting rhizobacteria (PGPR) colonize plant roots and promote plant growth by producing and secreting various chemical regulators in the rhizosphere. With the recent interest in sustainable agriculture, an increasing number of researchers are investigating ways to improve the efficiency of PGPR use to reduce chemical fertilizer inputs needed for crop production. Accordingly, greenhouse studies were conducted to evaluate the impact of PGPR inoculants on biomass production and nitrogen (N) content of corn (Zea mays L.) under different N levels. Treatments included three PGPR inoculants (two mixtures of PGPR strains and one control without PGPR) and five N application levels (0%, 25%, 50%, 75%, and 100% of the recommended N rate of 135 kg N ha −1). Results showed that inoculation of PGPR significantly increased plant height, stem diameter, leaf area, and root morphology of corn compared to no PGPR application under the same N levels at the V6 growth stage, but few differences were observed at the V4 stage. PGPR with 50% of the full N rate produced corn biomass and N concentrations equivalent to or greater than that of the full N rate without inoculants at the VT stage. In conclusion, mixtures of PGPR can potentially reduce inorganic N fertilization without affecting corn plant growth parameters. Future research is needed under field conditions to determine if these PGPR inoculants can be integrated as a bio-fertilizer in crop production nutrient management strategies.

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“…Iodine value decrease with decrease in refractive index and improves the quality and oxidation stability of oil [ 35 ]. Ahmad et al [ 36 ] reported that impregnation of PGPB with urea and DAP improved the nitrogen and phosphorus use efficiency by the wheat plant and also improved the photosynthetic rate and yield. The PGPB such as Azospirillum improved the nitrogen use efficiency by biological nitrogen fixation and facilitate the uptake of nutrient by the plants.…”

Section: Discussionmentioning

confidence: 99%

Improvement of safflower oil quality for biodiesel production by integrated application of PGPR under reduced amount of NP fertilizers

et al. 2018

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Safflower is an important industrial oil seed and bioenergy crop in semi-arid subtropical regions due to its potential to grow on marginal land and having good percentage of seed oil contents which is an important parameter for biofuel production. However, it is an ignored crop in Pakistan. In order to improve the crop productivity and reduce the use of agrochemicals for sustainable biodiesel feedstock production, an experiment was conducted for two years to improve the fatty acid composition and oil quality of Carthamus tinctorius L. (safflower) by the inoculation of Azospirillum and Azotobacter alone as well as in combined application with nitrogen and phosphate (NP) fertilizers on cultivars Thori and Saif-32 under field conditions. Separation and quantification of fatty acids were done on precise comprehensive two-dimensional gas chromatography (GC×GC). The results showed that fatty acid profile specifically monounsaturated fatty acids i-e oleic acid (C18:1) was significantly improved by Azospirillum supplemented with the quarter dose of NP fertilizers (SPQ) with concomitant decrease in polyunsaturated fatty acids by the respective treatment. Oil quality attributes such as acid value, saponification number, iodine value, refractive index and free fatty acid contents were reduced by the application of Azotobacter and Azospirillum in combination with half and quarter doses of NP fertilizers treatments (BTH, SPH, BTQ and SPQ). The reduction in these variables is positively linked with improved biodiesel yield and quality. It can be concluded that application of Azospirillum and Azotobacter not only reduced the use of NP fertilizers up to 50%–75% but also improved the oil quality in order to obtain environment friendly, sustainable and green fuel.

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Bacterial impregnation of mineral fertilizers improves yield and nutrient use efficiency of wheat

Abstract: The results suggest that the application of bacterially impregnated DAP and urea is highly effective for improving growth, yield and FUE of wheat. © 2017 Society of Chemical Industry.

Cited by 31 publications

References 42 publications

Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

Effect of Plant Growth-Promoting Rhizobacteria at Various Nitrogen Rates on Corn Growth

Improvement of safflower oil quality for biodiesel production by integrated application of PGPR under reduced amount of NP fertilizers

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