Humic Acid-A Critical Review

Duary, Swarnali

doi:10.20546/ijcmas.2020.910.270

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…The quality and composition of products containing HAs can vary considerably depending on the manufacturer and the raw material used in production (e.g., peat, lignite, leonardite), making it difficult to determine optimal application rates and timing [64,65]. Over-application of HAs can disrupt the soil nutrient balance [66] and lead to leaching and contamination of groundwater or surface water, as well as eutrophication of water bodies [67]. The application of HAs does not always have the expected (positive) effects, both on crop growth and yield [65,68,69] and on the improvement of soil properties [70].…”

Section: Discussionmentioning

confidence: 99%

Effects of Humic Acids on Calorific Value and Chemical Composition of Maize Biomass in Iron-Contaminated Soil Phytostabilisation

Wyszkowski,

Kordala

2024

Energies

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An interesting feedstock for energy purposes is plant biomass due to its renewability, widespread availability and relatively low cost. One plant with a high and versatile use potential is maize. Plants used for energy production can be grown in polluted areas, e.g., with iron. The aim of the study was to determine the effect of humic acids (Has) on the yield, calorific value and other energy parameters and chemical composition of maize biomass applied as a phytostabiliser on iron-contaminated soil. The soil was contaminated with iron at 0, 250, 500 and 750 mg kg−1. The Has were added to the soil in the following amounts: 0, 0.3, 0.6 and 0.9 g kg−1 of soil. Soil contamination with iron had relatively little effect on the heat of combustion and calorific value of biomass and very strongly reduced plant height (42%), dry matter yield (95%) and energy production of maize biomass (90%), the SPAD index at the fifth leaf unfolded stage (44%) (as opposed to the stem elongation stage), sodium, magnesium and phosphorus contents, and increased calcium, potassium and nitrogen contents of maize. The application of Has to the soil had a positive and very large effect on both the height and biomass parameters studied, resulting in an increase in plant height (22%), dry matter yield (67%) and energy production from maize biomass (62%). Changes in the heat of combustion and calorific value of the biomass were minimal but positive. Has contributed to a decrease in the value of the SPAD index during the stem elongation phase of maize and in the content of all macronutrients in maize biomass as a result of a reduction in the effect of iron on macronutrient content and to a significant increase in maize dry matter yield in plots with their application. The application of Has appears to be an effective adjunct in the phytostabilisation of iron-contaminated soils by growing crops for energy purposes.

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Section: Discussionmentioning

confidence: 99%

Effects of Humic Acids on Calorific Value and Chemical Composition of Maize Biomass in Iron-Contaminated Soil Phytostabilisation

Wyszkowski,

Kordala

2024

Energies

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“…Also, Sible et al (2021) mentioned that application of HA can have inconsistent results on yield, possibly due to the different biological origins of HA. Duary (2020) found that soil organic matter is required up to a satisfactory level for sustainable crop production and high crops yields over long periods. Humic Acid (HA), an organic substance, may help to overcome the production limitations through its growth stimulating property.…”

Section: I-plant Growth Traits I-1 Effect Of Soil Treatments Additionmentioning

confidence: 99%

Using Some Fertilization Treatments to Reduce the Negative Impact of Calcareous Soils on Productivity of Egyptian Cotton

elsayed

Kattosh,

2023

Menoufia Journal of Plant Production

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A field experiment was carried out through the two growing seasons of 2021 and 2022 to find out the impact of the addition of humic acid and sulphur at soil and foliar spraying with chelated Zn and/or chelated B in addition to their interactions on cotton cultivar Super Giza 94 (Gossypium barbadense L.) grown under calcareous soil located at El-Nubaria Station Farm, Agricultural Research Center, Egypt. The layout of the experiment was a split plot design with three replications. The obtained results revealed that humic acid as well as a mixture of chelated Zn and chelated B increased numbers of monopodia and sympodia/plant, plant height at harvest, total fruiting points number/plant and total bolls number set/plant, bolls setting%, seed cotton yield /feddan, yield components and fiber length in both seasons. Bolls shedding% was decreased in this respect. Humic acid alone significantly improved fiber fineness and decreased the 1 st sympodium node. Similarly, a mixture of chelated Zn and chelated B significantly increased fiber strength. Using humic acid interacting with a mixture of chelated Zn and chelated B significantly increased numbers of monopodia and total bolls set/plant, yield of seed cotton/feddan, yield components, fiber fineness and strength in the two seasons of study. In addition, it increased bolls setting% and number of sympodia/plant only in the 1 st season. However, bolls shedding% was decreased. Addition of humic acid to the soil interacting with chelated Zn foliar spraying recorded taller plants. It could be concluded that using humic acid interacting with a mixture of chelated Zn and chelated B alleviated and counteracted harmful effects of calcareous soil in El-Nubaria region on cotton productivity of cultivar Super Giza 94.

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“…Humic acid comprises different soil nutrients with phenolic and carboxylic compounds that increase soil physical and biochemical properties that increase soil organism population [15] and enhance soil nutrient availability by chelating and cotransporting micronutrients to plants [16]. Humic acid is found to promote plant hormones such as cytokinnin and auxin [17,18]. This research was conducted to determine the effects of humic acid fertilizers and the appropriate application levels for maximum performance and to compare humic acid at different levels with NPK 15-15-15 fertilizers.…”

Section: Introductionmentioning

confidence: 99%

Response of Okra Varieties to Different Fertilizer Level of Humic Acid

Aluko,

Alabi

2023

APRJ

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Background and Objective: Poor soil fertility is a great limitation to crop production. The adverse effects of chemical fertilizer and the unavailability of organic fertilizer in large quantities are another challenge. The research was conducted at the Research Farm of Ekiti State University, Ado-Ekiti, Nigeria to examine the effects of appropriate doses of humic acid (HA) fertilizers for maximum performance of okra. Materials and Methods: The experiment was laid out in Randomized Complete Block Design (RCBD) with three replicates. The two factorial experiments comprise four levels of humic acid fertilizer (0, 5.0, 10.0, and 15.0 g HA plant-1) and NPK 15-15-15 (150 kg hac-1), and two okra varieties. The two okra varieties were allocated to main plots while the fertilizer levels were allocated to sub-plots. The collected data on final plant height (cm), the number of leaves per plant, the number of fruits per plant, the weight of fresh fruit per plant (g), the fruit length (cm), the leaf area (cm3), the fruit diameter (cm), and the stem diameter (cm) and analyzed with the IRRI STAR Software. Results: The result showed that the traits measured were significantly different for (HA) levels and NPK fertilizers. The varieties were significantly different for the measured traits except for leaf area, fruit diameter, and fruit length while the varieties x amendment levels were significant for plant height, leaf area, fruit diameter, and stem diameter while others are not significant. The measured traits increases as the humic acid levels increase. It was observed that the plants that received 15.0 g HA plant-1 performed better, followed by 10.0g HA plant-1 and NPK 15-15-15 respectively. However, the differences in the plants that received 5.0g HA plant-1 and 7.5g HA plant-1 were minute. Conclusion: It is therefore concluded that 5.0g HA plant-1 should be applied for optimal okra yield.

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Humic Acid-A Critical Review

Cited by 5 publications

References 22 publications

Effects of Humic Acids on Calorific Value and Chemical Composition of Maize Biomass in Iron-Contaminated Soil Phytostabilisation

Effects of Humic Acids on Calorific Value and Chemical Composition of Maize Biomass in Iron-Contaminated Soil Phytostabilisation

Using Some Fertilization Treatments to Reduce the Negative Impact of Calcareous Soils on Productivity of Egyptian Cotton

Response of Okra Varieties to Different Fertilizer Level of Humic Acid

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