scholarly journals Papaya(Caricapapaya) Transplant Growth and Quality as Affected by Nitrogen and a Soil-applied Seaweed Extract

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1107E-1108 ◽  
Author(s):  
J. Pablo Morales-Payan ◽  
William M. Stall
Keyword(s):  
Ascophyllum Nodosum ◽  
Seaweed Extract ◽  
Growing Medium ◽  
Time Required ◽  
N Rates

Experiments were conducted to assess the effects of rate combinations of nitrogen (N) and a soil-applied biostimulant based on seaweed (Ascophyllum nodosum) extract (SSE) on the growth of papaya seedlings for transplant production. Seedlings were grown in 180-mL Styrofoam containers filled with a sphagnum/vermiculite/perlite growing medium. N (0 to 2 g per plant) and SSE (drench, 0 to 1 mL per plant) were applied at sowing and 15 days after emergence. N and SSE rates affected overall growth as well as time to attain adequate size for transplanting. In general, increasing N rates resulted in increased growth, and adding SSE enhanced N effects. In terms of increasing overall transplant growth and decreasing the time required from emergence to adequate transplanting size, the best results were found at the highest N and SSE rates.

Supplement of biochar and vermicompost amendments in coir and peat growing media improves N management and yields of leafy vegetables

2020 ◽  
pp. 1-14
Author(s):  
Aimé J. Messiga ◽  
Xiuming Hao ◽  
Martine Dorais ◽  
Carine S. Bineng ◽  
Noura Ziadi
Keyword(s):  
Leafy Vegetables ◽  
Partial Substitution ◽  
Growth Stages ◽  
Yield Gap ◽  
Mineral N ◽  
Growing Media ◽  
Growing Medium ◽  
N Management ◽  
N Rates ◽  
Plot Design

A greenhouse trial assessed the effects of biochar and vermicompost as partial substitutes of conventional growing media on leafy vegetables’ yields and changes of NH4+-N and NO3−-N in growing medium and leachates. Six growing media mixtures [(a) coir, (b) coir + biochar, (c) coir + vermicompost, (d) peat, (e) peat +vermicompost, (f) peat + biochar] combined with three nitrogen (N) rates [0% (0 g N·pot−1), 50% (0.5 g N·pot−1), and 100% (1.0 g N·pot−1) commercial recommendation] were arranged in a split-plot design with three replicates. On average, the yield gap between 100% N and 50% N was improved when biochar and vermicompost were used as substitutes of coir (32% and 28% vs. 49%) and peat (14% and 18% vs. 27%). The concentrations of NH4+-N in the leachates for peat + biochar varied between 17.20 and 1.00 mg·L−1. The concentrations of NO3−-N in the leachates varied between 130.0 and 1.0 mg·L−1 for coir + vermicompost, and 60 and 1.0 mg·L−1 for peat + vermicompost. The residual NO3−-N in peat + biochar growing media and the leachates did not match the changes observed for NH4+-N, and the much lower residual NH4+-N indicates possible NH4+-N retention by biochar and loss through volatilization in the early growth stages. Our results show that partial substitution of peat with biochar and coir with vermicompost maintained acceptable crop yield at 50% N due probably to N supply by vermicompost and decreased residual mineral N and loss by biochar in the leachates which could be beneficial for the environment.

scholarly journals Applications of a Commercial Extract of the Brown Seaweed Ascophyllum nodosum Increases Drought Tolerance in Container-grown ‘Hamlin’ Sweet Orange Nursery Trees

HortScience ◽  
2011 ◽  
Vol 46 (4) ◽  
pp. 577-582 ◽  
Author(s):  
Timothy M. Spann ◽  
Holly A. Little
Keyword(s):  
Drought Stress ◽  
Sweet Orange ◽  
Foliar Spray ◽  
Brown Seaweed ◽  
Ascophyllum Nodosum ◽  
Seaweed Extract ◽  
Plant Water ◽  
Stem Water Potential ◽  
Soil Drench ◽  
Commercial Extract

‘Hamlin’ sweet orange trees on ‘Carrizo’ citrange and ‘Swingle’ citrumelo rootstocks were treated weekly with a commercial extract of the brown seaweed Ascophyllum nodosum at 5 and 10 mL·L−1 as either a soil drench or foliar spray. Half of the trees in each treatment were subjected to drought stress [irrigated at 50% of evapotranspiration (ET)], whereas the other half remained fully irrigated (100% ET). Drought stress reduced shoot growth and leaf photosynthesis but increased root and total plant growth relative to the amount of water applied, thus increasing whole plant water use efficiency. Trees treated with seaweed extract and drought-stressed had significantly more total growth than untreated drought-stressed trees for both rootstocks. The maintenance of growth by the seaweed extract under drought stress conditions was unrelated to photosynthesis. However, the seaweed extract treatment did have a significant effect on plant water relations. Soil drench-treated trees had more growth and higher stem water potential than foliar-treated or control trees after 8 weeks of drought stress. These results indicate that seaweed extract may be a useful tool for improving drought stress tolerance of container-grown citrus trees.

scholarly journals Ascophyllum nodosum seaweed extract effect on morphology and cellulolytic ability of the fungus Fusarium oxysporum f. sp. vasinfectum

2020 ◽  
Vol 9 (11) ◽  
pp. e4079119913
Author(s):  
Thiago Anchieta de Melo ◽  
Ilka Márcia Ribeiro de Souza Serra ◽  
Ingrid Tayane Vieira da Silva do Nascimento
Keyword(s):  
Fusarium Oxysporum ◽  
Mycelial Growth ◽  
Culture Medium ◽  
Ascophyllum Nodosum ◽  
Progressive Increase ◽  
Fresh Mass ◽  
Seaweed Extract ◽  
Elongation Process ◽  
Different Doses

This work aimed to verify the effect in vitro, of Ascophyllum nodosum (AN) seaweed extract on the morphology and cellulolytic capacity of the fungus Fusarium oxysporum f. sp. vasinfectum (FOV). Thus, the fungus was placed in contact with different doses of the extract, being these: 0, 0.5, 1.0, 2.0, 4.0 and 8.0%. It was verified that the product, with increasing doses, progressively induced mycelial growth of the fungus, as measured by the diameter of the colonies and fresh mass of mycelium grown in PD (potato-dextrose) culture medium. This result was also corroborated by the progressive increase in the activity of the β-1,3-glucanase and chitinase enzymes required during the hypha elongation process. However, the AN extract progressively reduced FOV sporulation with increasing doses. Furthermore, the cellulolytic capacity of the phytopathogen was significantly reduced in the presence of the algae extract, which was measured by the activity of the enzymes endo-β-1,4-glucanase, exo-β-1,4-glucanase and β-glucosidase. Thus, these facts constitute important information for the management of fusariosis, since the inhibition of sporulation and decreasing degradation capacity of the cellulose by the pathogen, can translate into declined disease in compatible host-pathogen interactions.

scholarly journals Fruit set and yield of apple trees cv. Gala treated with seaweed extract of ascophyllum nodosum and thidiazuron

2019 ◽  
Vol 41 (1) ◽  
Author(s):  
Ricardo Antonio Ayub ◽  
Anelise Marques de Sousa ◽  
Thayna Viencz ◽  
Renato Vasconcelos Botelho
Keyword(s):  
Fruit Set ◽  
Titratable Acidity ◽  
Ascophyllum Nodosum ◽  
Fruit Weight ◽  
Soluble Solids ◽  
Seaweed Extract ◽  
Apple Trees ◽  
Fruit Length ◽  
Weight Yield ◽  
Amazonas State

Abstract The low effective fruiting is one of the biggest problems of apples’ production in Brazil and its main cause involves the process of pollination. The objective was to evaluate the fruit set and production of apple trees cv. Gala treated with extract of seaweed Ascophyllum nodosum and thidiazuron. The experiment was carried out during two cycles (2015/2016 and 2016/2017) in Porto Amazonas, State of Paraná, Brazil, with apple trees cv. Gala. The following treatments were applied at full bloom: thidiazuron at 10 and 15 mg L-1, Ascophyllum nodosum seaweed extract (Algamare®) at concentrations of 0.1, 0.2, 0.3, 0.4 and 0.6%. No treated plants were used as control. It was evaluated: fruit set, number of fruits, fruit weight, yield per plant, number of seeds per fruit, length and diameter of fruit, length/diameter ratio (L/D), titratable acidity, soluble solids, firmness and growth of shoots. The algae extract presented similar effects of thidiazuron in apple trees, promoting, in at least one of the cycles, the increase in fruit set, number of fruits, weight and length of fruits without changing their maturation. The application of Algamare® at 0.3% was the most effective treatment for yield improvement in ‘Gala’ apples.

scholarly journals In vitro suppression of Sclerotinia minor by a seaweed extract from Durvillaea potatorum and Ascophyllum nodosum

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Scott W. Mattner ◽  
Oscar N. Villalta ◽  
Denise Wite ◽  
Ian J. Porter ◽  
Tony Arioli
Keyword(s):  
Ascophyllum Nodosum ◽  
Seaweed Extract ◽  
Sclerotinia Minor

scholarly journals 170 The effects of supplementing a chelated mineral containing Ascophyllum nodosum on intake and performance of creep-fed hair lambs

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 76-77
Author(s):  
Victoria Romo ◽  
Jamie A Boyd
Keyword(s):  
Weather Conditions ◽  
Study Groups ◽  
Ascophyllum Nodosum ◽  
Seaweed Extract ◽  
Trace Mineral ◽  
Mineral Supplement ◽  
Significant Difference ◽  
Ewe Lamb ◽  
Ad Libitum ◽  
Mineral Levels

Abstract The objective of this study was to determine the effect of two commercial mineral supplements on ewes/lamb pairs DMI and ADG. All ewes prior to lambing were maintained a sheep pellet formulated for no mineral, vitamin, or probiotic content at a rate of 2% body weight, ad libitum Bermuda hay, and ad libitum access to the control mineral supplement. Ewe/lamb pairs were randomly assigned based on twining and parity to study groups four days post-lambing. The treatment (TRT) group had 12 ewes/18 lambs, and a control (CNTRL) group had 11 ewes/17 lambs, and was conducted over 6wks. Lambs in both groups were offered ad libitum alfalfa via a creep feeding gate. The TRT group received a commercial chelated mineral mix that included Ascophyllum nodosum seaweed extract in the blend and the CNTRL received a commercial non-chelated mineral without seaweed extract. Chelated minerals were Cu, Mn, and Zn. Daily feed and ort samples were collected 2x week and dried at 55℃ for analysis. Feed was adjusted daily to maintain a 3–5% refusal rate. Samples were compiled by week and analyzed for DM, Ash, aNDF, aADF, EE, and CP. Blood samples were collected from a subset of 7 ewes per group, 3x during the study (wk1, wk3, wk6) for later trace mineral analysis (Co, Cu, Fe, Mn, Mo, Se). Results indicate a significant difference in mineral DMI between groups (P = 0.03), but no significant impact on DMI of Bermuda or alfalfa. ADG for lambs was numerically increased 0.25±0.01 TRT versus 0.23±0.01 kg CNTRL but was not statistically significant (P = 0.18). No significant differences in trace mineral levels between groups or over time was seen. All mineral levels were in the normal range for both groups. It appears the addition of the chelated mineral with Ascophyllum nodosum seaweed extract did not improve ADG or DMI, but the results of this study were potentially affected by severe weather conditions. Further study is needed under more favorable conditions to confirm product impacts in ewe/lamb pairs.

scholarly journals 171 The effects of supplementing a chelated mineral containing Ascophyllum nodosum on intake and performance of creep-fed hair lambs

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 78-79
Author(s):  
Victoria Romo ◽  
Jamie A Boyd
Keyword(s):  
Weather Conditions ◽  
Study Groups ◽  
Ascophyllum Nodosum ◽  
Seaweed Extract ◽  
Trace Mineral ◽  
Mineral Supplement ◽  
Significant Difference ◽  
Ewe Lamb ◽  
Ad Libitum ◽  
Mineral Levels

Abstract The objective of this study was to determine the effect of two commercial mineral supplements on ewes/lamb pairs DMI and ADG. All ewes prior to lambing were maintained a sheep pellet formulated for no mineral, vitamin, or probiotic content at a rate of 2% body weight, ad libitum Bermuda hay, and ad libitum access to the control mineral supplement. Ewe/lamb pairs were randomly assigned based on twining and parity to study groups four days post-lambing. The treatment (TRT) group had 12 ewes/18 lambs, and a control (CNTRL) group had 11 ewes/17 lambs, and was conducted over 6wks. Lambs in both groups were offered ad libitum alfalfa via a creep feeding gate. The TRT group received a commercial chelated mineral mix that included Ascophyllum nodosum seaweed extract in the blend and the CNTRL received a commercial non-chelated mineral without seaweed extract. Chelated minerals were Cu, Mn, and Zn. Daily feed and ort samples were collected 2x week and dried at 55℃ for analysis. Feed was adjusted daily to maintain a 3–5% refusal rate. Samples were compiled by week and analyzed for DM, Ash, aNDF, aADF, EE, and CP. Blood samples were collected from a subset of 7 ewes per group, 3x during the study (wk1, wk3, wk6) for later trace mineral analysis (Co, Cu, Fe, Mn, Mo, Se). Results indicate a significant difference in mineral DMI between groups (P = 0.03), but no significant impact on DMI of Bermuda or alfalfa. ADG for lambs was numerically increased 0.25±0.01 TRT versus 0.23±0.01 kg CNTRL but was not statistically significant (P = 0.18). No significant differences in trace mineral levels between groups or over time were seen. All mineral levels were in the normal range for both groups. It appears the addition of the chelated mineral with Ascophyllum nodosum seaweed extract did not improve ADG or DMI, but the results of this study were potentially affected by severe weather conditions. Further study is needed under more favorable conditions to confirm product impacts in ewe/lamb pairs.

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