Plant growth promoting rhizobacteria increase the efficiency of fertilisers while reducing nitrogen loss

Paungfoo‐Lonhienne, Chanyarat; Redding, Matthew; Pratt, Chris; Wang, Weijin

doi:10.1016/j.jenvman.2018.12.052

Cited by 64 publications

(58 citation statements)

References 19 publications

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“…The worldwide consumption of NPK fertilisers is expected to rise from 135.4 million tonnes (Mt) in 2000/2001 to 204 Mt in 2023/2024 [ 5 ]. Nevertheless, the fertilisation effectiveness remains comparatively low, which is caused by the fact that only 50–60% of N [ 5 , 6 ] and K and 10–25% of P are estimated to be utilised by cultivated plants [ 5 ]. Taking this into account, the global demand for N has been expected to reach 107 teragrams (Tg) N per year (with a limit of 50 Tg N reactive not absorbed by plants) by the year 2050 [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, a higher fertilisation efficiency can be achieved by using slow/controlled release of nitrogen fertilisers that reduce the loss of N through leaching and evaporation [ 5 ]. Furthermore, the growing dependence on N fertilisers is a major issue in prevailing agriculture practices and has adverse environmental impacts due to several side effects, namely high costs of input and production [ 3 , 4 ], the contribution to the emission of greenhouse gases (up to 70% of the worldwide N 2 O) [ 8 ] and water eutrophication [ 6 ] which is the major threat to biodiversity [ 4 ]. Nitrogen is a crucial nutrient for the proper growth of crops and is a restrictive agent for food production [ 2 ] so it stands to reason that there is a need to seek a solution to enhance the efficiency of N fertilisers utilisation [ 9 ] without negative effects on the natural environment [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

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Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum)

et al. 2020

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The use of higher plants for the production of plant growth biostimulants is receiving increased attention among scientists, farmers, investors, consumers and regulators. The aim of the present study was to examine the possibility of converting plants commonly occurring in Europe (St. John’s wort, giant goldenrod, common dandelion, red clover, nettle, valerian) into valuable and easy to use bio-products. The biostimulating activity of botanical extracts and their effect on the chemical composition of celeriac were identified. Plant-based extracts, obtained by ultrasound-assisted extraction and mechanical homogenisation, were tested in field trials. It was found that the obtained formulations increased the total yield of leaves rosettes and roots, the dry weight of leaves rosettes and roots, the content of chlorophyll a + b and carotenoids, the greenness index of leaves, the content of vitamin C in leaves and roots. They mostly decreased the content of polyphenols and antioxidant activities in leaves but increased them in roots and conversely affected the nitrates content. Extracts showed a varied impact on the content of micro and macroelements, as well as the composition of volatile compounds and fatty acids in the celeriac biomass. Due to the modulatory properties of the tested products, they may be used successfully in sustainable horticulture.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum)

et al. 2020

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“…A wide range of PGPR can increase plant growth and yield, by such processes as nitrogen fixation; increasing the availability of Fe through production of siderophores; the production of phytohormones such as auxins, cytokinins, and gibberellin; declination of ethylene tension (Zaidi et al 2006;Martínez et al 2018); and production of organic acids, chelating agents, and mineral acids (like H 2 SO 4 and HNO 3 ) that can dissolve insoluble P to increase the availability of P and Zn in the soil (Dinesh et al 2018). Plant growth-promoting rhizobacteria can also promote plant growth by various mechanisms such as increasing the supply of nutrients, increasing root biomass or root surface area, and increasing nutrient uptake capacity of plants (Paungfoo-Lonhienne et al 2019). Pseudomonas and Bacillus genera contain a number of PGPR strains that secrete siderophores under conditions of Fe deficiency (Jha and Subramanian 2014).…”

Section: Introductionmentioning

confidence: 99%

Improved Growth and Nutrition of Sorghum (Sorghum bicolor) Plants in a Low-Fertility Calcareous Soil Treated with Plant Growth–Promoting Rhizobacteria and Fe-EDTA

Abbaszadeh‐Dahaji

Masalehi

Akhgar

2019

J Soil Sci Plant Nutr

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The low availability of micronutrients such as zinc (Zn) and iron (Fe) and macronutrients (phosphorus (P), in particular) in calcareous soils adversely affects plants such as sorghum (Sorghum bicolor) that are highly sensitive to deficiencies of these elements. This study investigated the potential effects of different Fe chelates and plant growth-promoting rhizobacteria (PGPR) on nutrition and growth of sorghum plants growing in a low-fertility calcareous soil. A glasshouse experiment was carried out in a completely randomized design with four PGPR treatments (Pseudomonas putida P159, Pseudomonas fluorescens T17-24, Bacillus subtilis P96, and an uninoculated control), and three Fe treatments (10 mg Fe kg −1 soil as Fe-EDDHA or Fe-EDTA, and no Fe application). Application of both Fe chelates (Fe-EDDHA and Fe-EDTA) increased plant dry weight, shoot content, and concentration of Zn and Cu (copper) compared with the control treatment; however, Fe-EDTAwas found to be more effective than Fe-EDDHA. Fe-EDTA significantly increased the concentration of Cu, Zn, and Mn (manganese) up to 74.7%, 40.3%, and 30.6% in the rhizosphere, respectively. The use of PGPR significantly increased plant growth as well as the content of Mn, Zn, Cu, and K (potassium) compared with the uninoculated plants. Overall, the Fe-EDTA chelate was more effective in increasing nutrient uptake and growth of sorghum plants than Fe-EDDHA because of its low chemical stability at high pH. Combined application of Fe-EDTA and PGPR strains provided the greatest growth and nutritional benefits to sorghum plants growing in the alkaline nutrient-deficient calcareous soil.

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“…These studies highlight the opportunity for in situ extraction from agricultural regions overlying P-rich bedrock where granules of underlying rock fragments are mixed with the upper productive soil horizons. In these cases, nutrient delivery could be achieved through inoculation with active bacterial and fungal strains [52,53].…”

Section: Geological P Prospectsmentioning

confidence: 99%

Geo-Agriculture: Reviewing Opportunities through Which the Geosphere Can Help Address Emerging Crop Production Challenges

et al. 2020

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The agricultural sector faces looming challenges including dwindling fertiliser reserves, environmental impacts of conventional soil inputs, and increasingly difficult growing conditions wrought by climate change. Naturally-occurring rocks and minerals may help address these challenges. In this case, we explore opportunities through which the geosphere could support viable agricultural systems, primarily via a literature review supplemented by data analysis and preliminary-scale experimentation. Our objective is to focus on opportunities specifically relating to emerging agricultural challenges. Our findings reveal that a spectrum of common geological materials can assist across four key agricultural challenges: 1. Providing environmentally-sustainable fertiliser deposits especially for the two key elements in food production, nitrogen (via use of slow release N-rich clays), and phosphorus (via recovery of the biomineral struvite) as well as through development of formulations to tap into mineral nutrient reserves underlying croplands. 2. Reducing contamination from farms—using clays, zeolites, and hydroxides to intercept, and potentially recycle nutrients discharged from paddocks. 3. Embedding drought resilience into agricultural landscapes by increasing soil moisture retention (using high surface area minerals including zeolite and smectite), boosting plant availability of drought protective elements (using basalts, smectites, and zeolites), and decreasing soil surface temperature (using reflective smectites, zeolites, and pumices), and 4. mitigating emissions of all three major greenhouse gases—carbon dioxide (using fast-weathering basalts), methane (using iron oxides), and nitrous oxide (using nitrogen-sorbing clays). Drawbacks of increased geological inputs into agricultural systems include an increased mining footprint, potential increased loads of suspended sediments in high-rainfall catchments, changes to geo-ecological balances, and possible harmful health effects to practitioners extracting and land-applying the geological materials. Our review highlights potential for ‘geo-agriculture’ approaches to not only help meet several key emerging challenges that threaten sustainable food and fiber production, but also to contribute to achieving some of the United Nations Sustainable Development Goals—‘Zero Hunger,’ ‘Life on Land,’ and ‘Climate Action.’

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Plant growth promoting rhizobacteria increase the efficiency of fertilisers while reducing nitrogen loss

Cited by 64 publications

References 19 publications

Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum)

Field-Scale Evaluation of Botanical Extracts Effect on the Yield, Chemical Composition and Antioxidant Activity of Celeriac (Apium graveolens L. Var. rapaceum)

Improved Growth and Nutrition of Sorghum (Sorghum bicolor) Plants in a Low-Fertility Calcareous Soil Treated with Plant Growth–Promoting Rhizobacteria and Fe-EDTA

Geo-Agriculture: Reviewing Opportunities through Which the Geosphere Can Help Address Emerging Crop Production Challenges

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