Nutritional quality and yield of onion as affected by different application methods and doses of humic substances

Bettoni, Marcelle Michelotti; Mógor, Átila Francisco; Pauletti, Volnei; Goicoechea, Nieves; Aranjuelo, Íker; Garmendia, Idoia

doi:10.1016/j.jfca.2016.06.008

Cited by 35 publications

(25 citation statements)

References 44 publications

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“…In contrast, other reports showed that foliar spray performed higher yield than soil application in tomato (Yildirim, 2007), maize (Tejada et al, 2016), almond (Saa et al, 2015), and sugarcane (Da Silva et al, 2017). An ideal implementation would be combined applications rather than a single application method, which was demonstrated in Bettoni et al (2016b) with higher nutritional quality and yield of onion. It is noteworthy that the positive effect of HS application on plant growth is not always guaranteed.…”

Section: Benefits and Limitations Of Hs Application In The Fieldmentioning

confidence: 93%

From Lab to Field: Role of Humic Substances Under Open-Field and Greenhouse Conditions as Biostimulant and Biocontrol Agent

et al. 2020

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The demand for biostimulants has been growing at an annual rate of 10 and 12.4% in Europe and Northern America, respectively. The beneficial effects of humic substances (HS) as biostimulants of plant growth have been well-known since the 1980s, and they can be supportive to a circular economy if they are extracted from different renewable resources of organic matter including harvest residues, wastewater, sewage sludge, and manure. This paper presents an overview of the scientific outputs on application methods of HS in different conditions. Firstly, the functionality of HS in the primary and secondary metabolism under stressed and non-stressed cropping conditions is discussed along with crop protection against pathogens. Secondly, the advantages and limitations of five different types of HS application under open-fields and greenhouse conditions are described. Key factors, such as the chemical structure of HS, application method, optimal rate, and field circumstances, play a crucial role in enhancing plant growth by HS treatment as a biostimulant. If we can get a better grip on these factors, HS has the potential to become a part of circular agriculture.

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Section: Benefits and Limitations Of Hs Application In The Fieldmentioning

confidence: 93%

From Lab to Field: Role of Humic Substances Under Open-Field and Greenhouse Conditions as Biostimulant and Biocontrol Agent

et al. 2020

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“…The impact of fertilization method on the accumulation of bulb nutrients is not fully understood. Application of humic acids was found to result in increased concentrations of bulb P (0.40%), K (1.17%), and Mg (0.32%) (Bettoni et al, 2016). In a hydroponic study, sweet onion bulb N levels were found to increase with N fertility and decrease slightly with S availability whereas bulb P levels responded linearly to N fertility.…”

Section: Discussionmentioning

confidence: 95%

Sweet Onion (Allium cepa L.) as Influenced by Organic Fertilization Rate: 1. Plant Growth, and Leaf and Bulb Mineral Composition

Dı́az-Pérez¹,

Bautista²,

Gunawan³

et al. 2018

horts

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Vidalia onions (Allium cepa L.) are sweet, short-day, low pungency, yellow Granex-type bulbs that are popular in the United States because of their mild flavor. There are limited studies on sweet onion plant growth in response to organic fertilization rate. The objective of this report was to evaluate the effects of organic fertilizer rates on sweet onion plant growth, and leaf and bulb mineral nutrients. Experiments were carried out at the Horticulture Farm, Tifton Campus, University of Georgia, in the Winters of 2012–13 and 2013–14. There were five treatments [organic fertilizer 3–2–3 equivalent to 0, 60, 120, 180, and 240 kg·ha−1 nitrogen (N)]. During the season and at the mature plant stage, root, stem, and bulb biomass increased whereas the root-to-shoot ratio decreased with increasing fertilization rate up to 120 kg·ha−1 N. Foliar concentrations of N and Ca decreased whereas Cu concentration increased with increasing organic fertilization rate. Bulb Mg and Mn increased whereas P and Cu decreased with increasing organic fertilization rate. The accumulation of mineral nutrients by onion whole plants increased quadratically (N, P, K, and S) or linearly (Ca and Mg) with increasing fertilization rate. The N use efficiency decreased with increasing organic fertilization rate; the agronomic efficiency of N (AEN) decreased quadratically and the marginal yield decreased linearly with increasing fertilization rate. Chlorophyll indices (CI) were highest with 240 kg·ha−1 N and lowest with 0 kg·ha−1 N. In conclusion, onion plant growth increased with increasing organic fertilizer rate probably because of augmented soil N levels. Observation of nutrient deficiencies late in the season, even at high organic fertilization rates, indicates that preplant application of organic fertilizer was sufficient to cover plant nutritional needs only partially and that applications of N fertilizer later in the season may be necessary. High application rates of organic fertilizer (above those required by the crop) may have resulted in significant N leaching because it is unlikely that the crop used most of the N that was mineralized. Bulb concentrations of P, K, Ca, Mg, S, B, Fe, Cu, and Mn were higher compared with values reported in the literature for onions produced with inorganic fertilizers.

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“…As claimed by Ertani et al 52 , this is also determined by the enhanced activity of glutamine synthetase and glutamate synthase, which are active at a specified concentration of NH 4 + , which ultimately can increase nitrogen concentration in plants. Results of the research carried out by Bettoni et al 53 indicate biostimulant application to lead to the improved absorption and translocation of nitrogen from roots to shoots in plants, which explains the increased protein content of leaves and seeds 41 . www.nature.com/scientificreports/ It should be emphasized that both the biostimulants based on seaweed extracts and these based on amino acids affect the development and resistance of particular parts of plants, i.e.…”

Section: Discussionmentioning

confidence: 98%

Biochemical and economical effect of application biostimulants containing seaweed extracts and amino acids as an element of agroecological management of bean cultivation

Kocira

Szparaga

Treder

et al. 2020

Sci Rep

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The implementation of agronomic activities, based on the use of biostimulants, is an important element of agroecological practices. Therefore, comprehensive research was carried on the use of biostimulants. A field experiment was performed in 2016–2018 with common bean of Mexican Black cultivar. In particular growing seasons, bean plants were treated with Kelpak SL (seaweed extracts) and Terra Sorb Complex (free amino acids) in the form of single and double spraying with two solutions concentrations. According to the obtained data, application of biostimulants increased the yield of bean. Better results were observed after the use of Kelpak SL. The application of preparations influenced nutritional and nutraceutical quality of bean seeds. Terra Sorb Complex caused the highest increase in proteins level. In the light of achieved data, biostimulants in similar level decreased the starch accumulation. The most promising results, in the context of nutraceutical value of bean, were obtained in the case of increasing level of fiber. A positive impact of biostimulants on the seeds antioxidant potential was noted, expressed by the increased synthesis of phenolics, flavonoid, anthocyanins and antioxidant activities. Results of this study, directly indicate economic benefits from the use of biostimulants, which are extremely important to the farmers.

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Nutritional quality and yield of onion as affected by different application methods and doses of humic substances

Cited by 35 publications

References 44 publications

From Lab to Field: Role of Humic Substances Under Open-Field and Greenhouse Conditions as Biostimulant and Biocontrol Agent

From Lab to Field: Role of Humic Substances Under Open-Field and Greenhouse Conditions as Biostimulant and Biocontrol Agent

Sweet Onion (Allium cepa L.) as Influenced by Organic Fertilization Rate: 1. Plant Growth, and Leaf and Bulb Mineral Composition

Biochemical and economical effect of application biostimulants containing seaweed extracts and amino acids as an element of agroecological management of bean cultivation

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