Commercial Humates from Coal and Their Influence on Soil Properties and Initial Plant Development

Iakimenko, Olga

doi:10.1007/1-4020-3252-8_19

Cited by 9 publications

(6 citation statements)

References 14 publications

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“…Briefly, Na + humate is a humic acid salt obtained by sodium hydroxide extraction of black or brown coal (lignite or leonardite) and is used as a soil conditioner, as a stabilizer for ion exchange resins in water treatment, as a drilling additive in the drilling of wells for hydrocarbon exploration/extraction and geothermal drilling, and in the remediation of polluted environments (http://www.ahmadsaeed.com/sodium_Humate.html). Apart from its mainly industrial use, limited studies have also tested its effects on plant growth, with results ranging from none to stimulatory or negative effects (Van De Venter et al ., ; Sharif et al ., ; Iakimenko, ; Tahir et al ., ). However, the current use of Na + humate described here has not, to our knowledge, been reported in the literature.…”

Section: Discussionmentioning

confidence: 99%

Uncoupling of sodium and chloride to assist breeding for salinity tolerance in crops

et al. 2015

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SummaryThe separation of toxic effects of sodium (Na + ) and chloride (Cl À ) by the current methods of mixed salts and subsequent determination of their relevance to breeding has been problematic. We report a novel method (Na + humate) to study the ionic effects of Na + toxicity without interference from Cl À , and ionic and osmotic effects when combined with salinity (NaCl).Three cereal species (Hordeum vulgare, Triticum aestivum and Triticum turgidum ssp. durum with and without the Na + exclusion gene Nax2) differing in Na + exclusion were grown in a potting mix under sodicity (Na + humate) and salinity (NaCl), and water use, leaf nutrient profiles and yield were determined. Under sodicity, Na + -excluding bread wheat and durum wheat with the Nax2 gene had higher yield than Na + -accumulating barley and durum wheat without the Nax2 gene. However, under salinity, despite a 100-fold difference in leaf Na + , all species yielded similarly, indicating that osmotic stress negated the benefits of Na + exclusion. In conclusion, Na + exclusion can be an effective mechanism for sodicity tolerance, while osmoregulation and tissue tolerance to Na + and/or Cl À should be the main foci for further improvement of salinity tolerance in cereals. This represents a paradigm shift for breeding cereals with salinity tolerance.

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Section: Discussionmentioning

confidence: 99%

Uncoupling of sodium and chloride to assist breeding for salinity tolerance in crops

et al. 2015

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“…This leads to the conclusion that either CH bound N is unavailable for plants, or the amount and quality of HA are more important for growth-stimulating effects of CH than the total amount of nutrients. [32] Clayton, Australia Pot experiment/Stony Creek (SC) and Cranbourne (CB)…”

Section: Impact Of Lrc On Plant Growth and Crop Yieldmentioning

confidence: 99%

Low-Rank Coal as a Source of Humic Substances for Soil Amendment and Fertility Management

et al. 2021

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Humic substances (HS), as important environmental components, are essential to soil health and agricultural sustainability. The usage of low-rank coal (LRC) for energy generation has declined considerably due to the growing popularity of renewable energy sources and gas. However, their potential as soil amendment aimed to maintain soil quality and productivity deserves more recognition. LRC, a highly heterogeneous material in nature, contains large quantities of HS and may effectively help to restore the physicochemical, biological, and ecological functionality of soil. Multiple emerging studies support the view that LRC and its derivatives can positively impact the soil microclimate, nutrient status, and organic matter turnover. Moreover, the phytotoxic effects of some pollutants can be reduced by subsequent LRC application. Broad geographical availability, relatively low cost, and good technical applicability of LRC offer the advantage of easy fulfilling soil amendment and conditioner requirements worldwide. This review analyzes and emphasizes the potential of LRC and its numerous forms/combinations for soil amelioration and crop production. A great benefit would be a systematic investment strategy implicating safe utilization and long-term application of LRC for sustainable agricultural production.

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“…However, the chemistry of commercial humates and the physiological effects they can induce in plants can vary greatly depending on factors such as the starting material, extraction processes, and technical approaches used to produce them [ 30 , 33 ]. Furthermore, even if they originate from the same source and are manufactured by the same company, humates, and HS in general, can exhibit significant differences in composition [ 34 ], generally due to different extraction procedures and/or processing methods [ 35 ], as well as to variations in the decomposition degree of the source material. Thus, it is crucial to characterize in-depth the marketed products and evaluate their efficacy as biostimulants.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Acquisition Efficiency and Transcriptomic Changes in Maize Plants Treated with Two Lignohumates

Santoro,

Della Lucia,

Francioso

et al. 2023

Plants

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Lignohumates are increasing in popularity in agriculture, but their chemistry and effects on plants vary based on the source and processing. The present study evaluated the ability of two humates (H1 and H2) to boost maize plant performance under different phosphorus (P) availability (25 and 250 μM) conditions in hydroponics, while understanding the underlying mechanisms. Humates differed in chemical composition, as revealed via elemental analysis, phenol and phytohormone content, and thermal and spectroscopic analyses. H1 outperformed H2 in triggering plant responses to low phosphorus by enhancing phosphatase and phytase enzymes, P acquisition efficiency, and biomass production. It contained higher levels of endogenous auxins, cytokinins, and abscisic acid, likely acting together to stimulate plant growth. H1 also improved the plant antioxidant capacity, thus potentially increasing plant resilience to external stresses. Both humates increased the nitrogen (N) content and acted as biostimulants for P and N acquisition. Consistent with the physiological and biochemical data, H1 upregulated genes involved in growth, hormone signaling and defense in all plants, and in P recycling particularly under low-P conditions. In conclusion, H1 showed promising potential for effective plant growth and nutrient utilization, especially in low-P plants, involving hormonal modulation, antioxidant enhancement, the stimulation of P uptake and P-recycling mechanisms.

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Commercial Humates from Coal and Their Influence on Soil Properties and Initial Plant Development

Cited by 9 publications

References 14 publications

Uncoupling of sodium and chloride to assist breeding for salinity tolerance in crops

Uncoupling of sodium and chloride to assist breeding for salinity tolerance in crops

Low-Rank Coal as a Source of Humic Substances for Soil Amendment and Fertility Management

Phosphorus Acquisition Efficiency and Transcriptomic Changes in Maize Plants Treated with Two Lignohumates

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