Journal ArticleDOI
Calcium and humic acid affect seed germination, growth, and nutrient content of tomato (Lycopersicon esculentum L.) seedlings under saline soil conditions
TLDR
Hic acid applied to the plant growth medium at 1000 mg kg−1 concentration increased seedling growth and nutrient contents of plants and enhanced micro-nutrient contents of plant organs, however, high levels of humic acid arrested plant growth or decreased nutrient contents.Abstract:
The effects of calcium and humic acid on seed germination, growth and macro- and micro-nutrient contents of tomato (Lycopersicon esculentum L.) seedlings in saline soil conditions were evaluated. Different levels of humic acid (0, 500, 1000 and 2000 mg kg−1) and calcium (0, 100, 200 and 400 mg kg−1) were applied to growth media treated with 50 mg NaCl kg−1 before sowing seeds. Seed germination, hypocotyl length, cotyledon width and length, root size, shoot length, leaf number, shoot and root fresh weights, and shoot and root dry weights of the plant seedlings were determined. Macro- and micro-nutrient (N, P, K, Ca, Mg, S, Cu, Fe, Mn and Zn) contents of shoot and root of seedlings were also measured. Humic acid applied to the plant growth medium at 1000 mg kg−1 concentration increased seedling growth and nutrient contents of plants. Humic acid not only increased macro-nutrient contents, but also enhanced micro-nutrient contents of plant organs. However, high levels of humic acid arrested plant growth or de...read more
Citations
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Journal ArticleDOI
Humic and fulvic acids as biostimulants in horticulture
Luciano Pasqualoto Canellas,Luciano Pasqualoto Canellas,Fábio Lopes Olivares,Natália Oliveira Aguiar,Davey L. Jones,Antonio Nebbioso,Pierluigi Mazzei,Alessandro Piccolo +7 more
TL;DR: In this article, the authors define humic substances in a horticultural context and present a general schematic model of plant-humic responses, highlighting the relationship between the chemical properties of humified matter and its bioactivity with specific reference to the promotion of lateral root growth.
Journal ArticleDOI
Synergistic Biostimulatory Action: Designing the Next Generation of Plant Biostimulants for Sustainable Agriculture.
Youssef Rouphael,Giuseppe Colla +1 more
TL;DR: The review identifies several perspectives for future research between the scientific community and private industry to design and develop a second generation of PBs products (biostimulant 2.0) with specific biostimulatory action to render agriculture more sustainable and resilient.
Journal ArticleDOI
Effect of Humic Acid on Plant Growth, Nutrient Uptake, and Postharvest Life of Gerbera
TL;DR: The effect of Humic acid on growth, macro-and micronutrient contents, and postharvest life of Gerbera (Gerbera jamesonii L.) cv. was examined in this article.
Journal ArticleDOI
Plant biostimulants: innovative tool for enhancing plant nutrition in organic farming
Journal ArticleDOI
The influence of foliar and soil fertilization of humic acid on yield and quality of pepper
TL;DR: In this article, the influence of foliar and soil HA application on fruit quality and yield of organically grown pepper was found to increase the total and reducing sugar contents significantly increased in response to both foliar HA treatments and this effect was mainly on chlorophyll b content.
References
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Journal ArticleDOI
The influence of humic acids derived from earthworm-processed organic wastes on plant growth.
TL;DR: The incorporation of both types of vermicompost-derived humic acids, into either type of soilless plant growth media, increased the growth of tomato and cucumber plants significantly, in terms of plant heights, leaf areas, shoot and root dry weights.
Journal ArticleDOI
Calcium as a plant nutrient
E. A. Kirkby,D. J. Pilbeam +1 more
TL;DR: The phloem/xylem ratio of the solute input can be particularly critical in organs which are naturally low in Ca, such as fruits and young leaves.
Journal ArticleDOI
Earthworm humic matter produces auxin-like effects on Daucus carota cell growth and nitrate metabolism
TL;DR: It is shown that HEf affects nitrate metabolism, has auxin-like activity, was strongly acidic and had elevated peptide, carbohydrate and aliphatic C contents.