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Статті в журналах з теми "Commercial seaweed biostimulants":
1
D’Addabbo, Laquale, Perniola, and Candido. "Biostimulants for Plant Growth Promotion and Sustainable Management of Phytoparasitic Nematodes in Vegetable Crops." Agronomy 9, no. 10 (October 7, 2019): 616. http://dx.doi.org/10.3390/agronomy9100616.
Анотація:
The parasitism of root-knot nematodes, Meloidogyne spp., can cause heavy yield losses to vegetable crops. Plant biostimulants are often reported for a side-suppressive effect on these pests and many commercial products are increasingly included in sustainable nematode control strategies. Source materials of most biostimulants derived from plant or seaweed raw materials were documented for a reliable suppression of root-knot nematode species, whereas the suppressiveness of microbial biostimulants was found largely variable, as related to the crop and to environmental factors. Chitosan-based biostimulants were also stated for a variable phytonematode suppression, though clearly demonstrated only by a few number of studies. In a preliminary experimental case study, four commercial biostimulants based on quillay extract (QE), sesame oil (SO), seaweeds (SE), or neem seed cake (NC) were comparatively investigated for their effects against the root-knot nematode M. incognita on potted tomato. Soil treatments with all the four biostimulants resulted in a significant reduction of nematode eggs and galls on tomato roots, though NC and SO were significantly more suppressive than QE or SE. In addition, almost all biostimulant treatments also resulted in a significant improvement of tomato growth compared to the non-treated control. These preliminary results seem to confirm the literature data and clearly indicate the potential role of biostimulants for a safe nematode management both in organic and integrated crop systems.
2
Crouch, I. J., and J. Van Staden. "Commercial Seaweed Products as Biostimulants in Horticulture." Journal of Home & Consumer Horticulture 1, no. 1 (October 14, 1993): 19–76. http://dx.doi.org/10.1300/j280v01n01_03.
3
Ashour, Mohamed, Ahmed Said Al-Souti, Shimaa M. Hassan, Gamal A. G. Ammar, Ashraf M. A. S. Goda, Rania El-Shenody, Abd El-Fatah Abomohra, Ehab El-Haroun, and Mostafa E. Elshobary. "Commercial Seaweed Liquid Extract as Strawberry Biostimulants and Bioethanol Production." Life 13, no. 1 (December 28, 2022): 85. http://dx.doi.org/10.3390/life13010085.
Анотація:
Seaweeds are increasingly intriguing as a sustainable source of bioactive compounds. They have applications in agriculture, fuels, feed, and food products. To become a cost-competitive product with zero waste, a biorefinery approach is applied, where several products are valorized at the same time. True-Algae-Max (TAM®) has been investigated for its ability to improve the yield and nutritional facts of a strawberry plant. Three concentrations of TAM (0, 50, and 100%) were examined by foliar spray in 2017 with 50% NPK chemical fertilizer. Results indicated that growth, yield, chlorophyll, and potassium content were significantly improved by TAM treatments. TAM50 % resulted in maximum root length, leaf area, plant fresh weight, fruit weight, and yield with an increase ranging from 10 to 110% compared to control. Compared to the NPK control, strawberries grown with TAM50% improved total soluble solids (TSS) from 7.58 to 10.12% and anthocyanin from 23.08 to 29.42 mg CGE 100 g−1. Noteworthily, this reduced total sugar, and total phenolics were boosted by TAM applications, while non-reducing sugar was reduced compared to control. On the other hand, whole seaweed biomass and TAM residuals were used for bioethanol production by acid scarification. The maximum bioethanol yield was observed in residual biomass (0.34 g g−1 dw), while the whole seaweed biomass showed only 0.20 g g−1 dw. These results proved the biorefinery concept of using seaweed extract as a biostimulator and bioethanol production.
4
Aremu, Adeyemi O., Gugulethu Makhaye, Samson Zeray Tesfay, Abe Shegro Gerrano, Christian P. Du Plooy, and Stephen O. Amoo. "Influence of Commercial Seaweed Extract and Microbial Biostimulant on Growth, Yield, Phytochemical Content, and Nutritional Quality of Five Abelmoschus esculentus Genotypes." Agronomy 12, no. 2 (February 9, 2022): 428. http://dx.doi.org/10.3390/agronomy12020428.
Анотація:
Biostimulant application during the cultivation of underutilized crops is an environmental-friendly approach for their production and utilization to promote food security and human health. This study investigated the effect of two commercial biostimulants (a seaweed-based extract, Kelpak® (1:100, 1:40, and 1:20, dilutions), and plant growth promoting rhizobacteria, PGPR (1:5, 1:10, and 1:15, dilutions)) on the growth, yield, phytochemical content, and nutritional quality of five selected Abelmoschus esculentus genotypes. Biostimulant application significantly influenced vegetative growth and yield in a dose-dependent manner. Plant height, chlorophyll content, stem diameter, number of pods, and total pod fresh and dry weights increased with a decrease in dilution of the biostimulants. The application of PGPR (1:5) significantly promoted both the vegetative growth (plant height, chlorophyll content, and stem diameter) and yield (number of pods, total fresh weight, and total dry weight) when compared to the control (untreated plants) and other biostimulant dilutions. Genotype and biostimulant application had an interactive effect on all the phytochemical (total phenolics, flavonoids, and condensed tannins) and nutritional (β-carotene, vitamin C, calcium, iron, potassium, magnesium, sodium, and zinc) qualities evaluated. This study demonstrated the differential effect of biostimulant application on A. esculentus genotypes. These biostimulants can be used to enhance growth, yield, biochemical, and nutritional contents of underutilised crops such as A. esculentus, depending on the crop genotype, in order to improve crop productivity and combat food insecurity especially in food insecure communities.
5
Santos, Patrick Luan Ferreira dos, Alessandro Reinaldo Zabotto, Half Weinberg Corrêa Jordão, Roberto Lyra Villas Boas, Fernando Broetto, and Armando Reis Tavares. "Use of seaweed-based biostimulant (Ascophyllum nodosum) on ornamental sunflower seed germination and seedling growth." Ornamental Horticulture 25, no. 3 (September 2019): 231–37. http://dx.doi.org/10.1590/2447-536x.v25i3.2044.
Анотація:
Abstract Seaweed extracts are employed as biostimulants due to their beneficial effects on crop growth and yield. Ascophyllum nodosum seaweed extract aid to improve seedling growth and development, and decrease seedlings production costs; however, the correct concentration must be used in order to maximize the biostimulant effects. Consequently, this study aimed to analyze the effects of different concentrations of a seaweed-based (Ascophyllum nodosum) biostimulant on ornamental sunflower seed germination and seedling growth. Seeds of ornamental sunflower cv. “Sol Pleno” were sown in polyethylene trays containing commercial substrate. The treatments consisted of dairy spraying 60 mL of the solutions 0 (control), 5, 10 or 15 mL L-1 biostimulant on substrate. The experimental design was completely randomized with 4 treatments (concentrations of biostimulant) and 4 replicates (10 seeds replicate-1). The evaluated variables were percentage, index and time averages of germination, seedling height, fresh and dry mass of shoot and roots, and root system morphology (WinRhizo). The increase of the biostimulant concentration enhances seed germination and seedlings development. The concentration 15 mL L-1 biostimulant showed the best results for percentage and index of germination and the lowest mean germination time and increase plant height and fresh and dry mass of shoots in relation to the control treatment. Accordingly, 15 mL L-1 biostimulant (Ascophyllum nodosum) is recommended for ornamental sunflower “Sol Pleno” seed germination and seedlings growth.
6
Kalozoumis, Panagiotis, Christos Vourdas, Georgia Ntatsi, and Dimitrios Savvas. "Can Biostimulants Increase Resilience of Hydroponically-Grown Tomato to Combined Water and Nutrient Stress?" Horticulturae 7, no. 9 (September 8, 2021): 297. http://dx.doi.org/10.3390/horticulturae7090297.
Анотація:
In the current experiment, tomato (Solanum lycopersicum cv. Nostymi F1) was cultivated in an open hydroponic system under optimal or stress conditions caused by reducing the supply of nutrient solution by 35–40% and treated with biostimulants to test whether their application can increase crop resilience to combined shortage of nutrients and water. The four different biostimulant treatments were: (i) no biostimulant application, (ii) treatment with the protein-based biostimulants COUPÉ REGENERACIÓN Plus and PROCUAJE RADICULAR provided by EDYPRO, (iii) treatment with a novel biostimulant based on strigolactones, provided by STRIGOLAB and (iv) treatment with MAXICROP, a commercial product consisting of seaweed extracts. Combined stress significantly reduced NO3−, P, and K in the root zone of tomato plants. However, the application of the strigolactone-based biostimulant to stressed plants maintained NO3− in the root zone to similar levels with non-stressed plants during the first and third months of cultivation. The biostimulants did not increase the vegetative plant biomass at 70 and 120 days after transplanting (DAT). The strigolactone-based biostimulant increased early leaf area development (70 DAT) and early fruit production compared to untreated plants but had no effect on total tomato yield (120 DAT). Maxicrop also increased early fruit yield, while Edypro decreased early and total yield compared to the control plants, an effect ascribed to overdosing, as the application rate was that suggested for soil-grown crops, while the plants were cultivated on an inert substrate. Strigolactone-based biostimulant and Maxicrop could be further studied by testing multiple applications during the cropping period.
7
Mueller, S. R., and W. R. Kussow. "Biostimulant Influences on Turfgrass Microbial Communities and Creeping Bentgrass Putting Green Quality." HortScience 40, no. 6 (October 2005): 1904–10. http://dx.doi.org/10.21273/hortsci.40.6.1904.
Анотація:
Immature sand matrix golf putting greens are considered to be inhospitable environments for microorganisms as compared to native soils. Subsequently, turfgrass quality may suffer in the absence of beneficial microbe–plant interactions. The turfgrass industry has responded by marketing a wide array of biostimulant products that claim to improve putting green quality through influences on soil microbial activity. A field study was conducted to determine what influences five commercial biostimulants have on the root-zone microbial community and creeping bentgrass (Agrostis stolonifera L.) quality. A three year old U.S. Golf Association (USGA) specification sand-based putting green (e.g., 80% sand: 20% peat humus by volume) was the test site. Commercially available biostimulants and fertilizer were applied biweekly from May until August 2000. The soil microbial community was characterized using soil enzymes and substrate utilization profiles. Turfgrass quality was determined visually by evaluating color, percentage of localized dry spot (LDS), and overall uniformity. Nutrient uptake levels were monitored to ascertain if increases in quality related to plant health. Visual quality of the putting green was significantly improved (p < 0.05) by the commercial biostimulants. The positive response to biostimulants was not of a nutritional origin. The biostimulants did not effectively alter the putting green microbial community in terms of enzyme activity or substrate utilization. However, a seasonal decline was detected in cellulase activity, which prevailed over any treatment effect, suggesting the root-zone microbial community responded to summer decline of bentgrass roots and concomitant decreases in quantities of root exudates. Visual improvements in putting green quality during the period of summer stress were primarily associated with the incidence of LDS. Visual LDS ratings were significantly reduced (less LDS) by applications of the biostimulants on each observation date (p < 0.05) and over the entire course of the experiment (p < 0.10). Surfactant properties of the biostimulants therefore appeared to play a major role in the improvements in putting green quality. This does not negate the fact that the seaweed extracts and humic acids in the biostimulants may have improved the heat and moisture stress tolerance of the bentgrass once the LDS formed.
8
Soppelsa, Sebastian, Markus Kelderer, Raffaele Testolin, Damiano Zanotelli, and Carlo Andreotti. "Effect of Biostimulants on Apple Quality at Harvest and After Storage." Agronomy 10, no. 8 (August 18, 2020): 1214. http://dx.doi.org/10.3390/agronomy10081214.
Анотація:
Nutritional unbalances, such as calcium deficiency at the fruit level, are generally the causative agent of post-harvest disorders in apples. Foliar application of Ca as calcium chloride is the current solution to increase Ca concentration in apples, even though the effectiveness of this approach is often not satisfactory. In this research, we tested the efficacy of a combined application of Ca with selected biostimulants to improve apple quality and to reduce the incidence of storage disorders. The experiment was conducted in two “Jonathan” apple orchards that differed in management systems and characteristics. Tree canopies were sprayed with calcium chloride alone and in combination with a commercial product containing zinc and silicon or a seaweed extract. The seaweed extract increased apple quality by boosting the reddish coloration (+32% of color index) and by enhancing final anthocyanin concentration of fruit skin. Both biostimulants significantly reduced (by 20%) the incidence of the physiological disorder, known as “Jonathan spot”, after 160 days of storage. Increased concentration of nutrients (Ca, Zn, and Mn) in the skin of apples after biostimulant applications, together with changes of the phenolic profile during the storage, are discussed as the possible causes of the reduced fruit susceptibility to post-harvest disorders.
9
Makhaye, Gugulethu, Adeyemi O. Aremu, Abe Shegro Gerrano, Samson Tesfay, Christian P. Du Plooy, and Stephen O. Amoo. "Biopriming with Seaweed Extract and Microbial-Based Commercial Biostimulants Influences Seed Germination of Five Abelmoschus esculentus Genotypes." Plants 10, no. 7 (June 29, 2021): 1327. http://dx.doi.org/10.3390/plants10071327.
Анотація:
Seed germination is a crucial step in plant propagation, as it controls seedling production, stand establishment and ultimately crop yield. Approaches that can promote seed germination of valuable crops remain of great interest globally. The current study evaluated the effect of biostimulant (Kelpak® and plant-growth-promoting rhizobacteria—PGPR) biopriming on the seed germination of five (VI037996, VI046567, VI055421, VI050956, and VI033796) Abelmoschus esculentus genotypes. The germination responses of the bio-primed seeds were measured using six parameters, including final germination percentage (FGP), mean germination time (MGT), germination index (GI), coefficient of velocity of germination (CVG), germination rate index (GRI), and time spread of germination (TSG). Biostimulant application significantly affected MGT (1.1–2.2 days), CVG (1.4–5.9), and TSG (1.2–3.0 days). Genotype also significantly influenced the TSG (1–3 days). Significant interaction effect of biostimulant treatment and genotype was evident on the FGP, GI, and GRI of the germinated seeds. The most noteworthy effect was demonstrated by Kelpak® (1:100) applied to genotype VI037996, with significantly improved FGP (82%), GI (238), and GRI (77%/day) when compared to the control. Overall, the current findings suggest the potential stimulatory effect of biostimulants (especially Kelpak®) on the germination of Abelmoschus esculentus seeds. However, this influence was strongly dependent on the type of genotype.
10
Soppelsa, Sebastian, Markus Kelderer, Claudio Casera, Michele Bassi, Peter Robatscher, Aldo Matteazzi, and Carlo Andreotti. "Foliar Applications of Biostimulants Promote Growth, Yield and Fruit Quality of Strawberry Plants Grown under Nutrient Limitation." Agronomy 9, no. 9 (August 26, 2019): 483. http://dx.doi.org/10.3390/agronomy9090483.
Анотація:
Biostimulants have been found effective in enhancing plant resistance toward stressful conditions. The aim of the present study was to evaluate the efficacy of selected biostimulants to overcome the negative effects of nutrient limitation on the growth performances and on the fruit quality of soilless cultivated strawberry plants. The condition of nutrient limitation was imposed by supplying the plants with only a single fertilization at transplantation and by excluding any further nutrient supply for the entire duration of the experiment (three months, from May to July). Strawberry plants were treated seven times during the period from preflowering up to berry maturation with different classes of biostimulants (humic acids, alfalfa hydrolysate, macroseaweed extract and microalga hydrolysate, amino acids alone or in combination with zinc, B-group vitamins, chitosan, and a commercial product containing silicon) at commercial dosages. The use of alfalfa hydrolysate, vitamins, chitosan, and silicon was able to promote biomass accumulation in roots (four to seven folds) and fruits (+20%) of treated plants, whereas the total leaf area increased by 15%–30%. Nutrient concentrations in leaves and roots showed variations for microelements (e.g., Fe, B, Zn, and Si) in response to biostimulant applications, whereas no significant differences were observed for macronutrient contents among treatments. Final berry yield was found around 20% higher in chitosan- and silicon-treated plants. Chitosan treatment significantly increased pulp firmness (by 20%), while a high nutritional value (e.g., phenolic compounds concentration) was observed in alfalfa- and seaweed-treated fruits (+18%–20% as compared to control). The overall outcomes of the present experiment show that selected biostimulants can be considered as a valid agronomic tool able to contrast the negative consequence of growing crops under insufficient nutritional conditions.
Дисертації з теми "Commercial seaweed biostimulants":
1
Collins, Daniel. "A HPLC-ESI-MS/MS Study of Hydroxybenzoic Acids and Related Derivatives in Commercial Seaweed Biostimulants and their Plant Growth Bioactivity." Thesis, 2022. https://vuir.vu.edu.au/44693/.
Анотація:
The rapidly growing world population, increasing severity of climate change, and constantly evolving environmental pressures have drawn into question whether current agricultural practices can meet the growing food demands healthily, equitably and sustainably. This has resulted in the rising popularity of natural biostimulants, particularly seaweed extracts, to increase crop productivity in an eco-friendly and safe manner. To better understand the complex modes of action underpinning the well-reported benefits of seaweed biostimulants to crops, their phytochemical composition requires further characterisation. Hydroxybenzoic acids, a subclass of phenolic acids, are an important class of phytochemicals and the aim of this study was to characterise their profile in commercial seaweed biostimulants. This work used modern analytical technologies to investigate salicylic acid and other benzoic acid derivatives in a commercial seaweed biostimulant, and then assessed the biological activity of the monohydroxybenzoic acids using plant growth assays.
Qualitative HPLC-ESI-MS/MS methods were developed for the analysis of hydroxybenzoic acids and related derivatives. The various benzoic acid derivatives investigated include monohydroxybenzoic acids, dihydroxybenzoic acids, trihydroxybenzoic acids, methoxylated hydroxybenzoic acids, methoxylated benzoic acids, and an amino substituted benzoic acid. The HPLC-ESI-MS/MS methods for the analysis of the various derivatives were then employed to investigate the presence of these compounds in the commercial seaweed biostimulant. The compounds found to be present were the monohydroxybenzoic acids, 2,3- and 3,4-dihydroxybenzoic acid, syringic acid, and anthranilic acid.
A HPLC-ESI-MS/MS method for the analysis of the monohydroxybenzoic acids was optimised and partially validated for the quantification of salicylic acid and its isomers in a commercial seaweed biostimulant. Sample preparation employed acidified acetonitrile partitioning of the seaweed biostimulant before mixed-mode solid-phase extraction. The three isomers were successfully separated using a reversed-phase biphenyl stationary phase with a methanol/water mobile phase acidified with formic acid. The MS/MS detection employed the characteristic MRM transition of m/z 137 93 of the monohydroxybenzoic acids. The concentrations of 2-, 3- and 4-hydroxybenzoic acid in a commercial seaweed biostimulant were found to be 137, 3409, and 1748 μg/L, respectively.
Tomato seedling plant growth bioassays were conducted to investigate the biological effects of salicylic acid and its isomers on plant growth. Fresh and dry root and shoot weight data along with longest root length data were assessed to evaluate the biological effects of the various treatments on tomato seedling growth. It was found that a significant increase in root growth was observed when the commercial seaweed biostimulant was fortified with a combination of the three monohydroxybenzoic acids, using dosages that correlate to the concentrations determined in the seaweed biostimulant in this study.