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Filtrate seaweed extract as biostimulant in nursery organic horticulture

Alessandra, Trinchera; Andrea, Marcucci; Marco, Renzaglia and Elvira, Rea (2014) Filtrate seaweed extract as biostimulant in nursery organic horticulture. In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 3, Thuenen Report, no. 20, pp. 697-700.

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Many naturally-derived products are used as growth promoters or biostimulants on vegetables, even if their mechanisms of action are not still now completely clarified. Among them, seaweeds and seaweed products are inserted as admissible organic fertilizers in the Annex I of the Reg. (EC) No. 889/2008, even if their biostimulant properties are not recognized in organic farming.
After a previous bioassay on maize germination for defining the optimal water dilution ratios of the filtrate seaweed extract (FSE), in the present research we applied the FSE at two diluted doses to a greenhouse organic lettuce, for assessing its biostimulant effect on vegetable growth and nutrient uptake.
The greenhouse pot trials were conducted on Lactuca sativa L., by applying FSE at 1/250 and 1/500 v/v water dilutions. After 90 days, root fresh/dry weight, shoot fresh/dry weight and dry matter, number of leaves, LAI, specific leaf fresh/dry weight, total dry biomass, leaf macro and micro elements (P, K, Ca, Mg, Fe, Na, Mn, Cu, Zn, B) content and total chlorophyll were determined.
Obtained results indicated that FSE plays a role in promoting the increase of lettuce shoot dry weight and related nutrient uptake, with particular efficacy in relation to P and K macroelements. This property is better expressed at the highest dilution, confirming that the biostimulating activity of the formulate acts without any nutritional effect: thus, the FSE appears to be a good opportunity for promoting the early-stage development for organic nursery production

EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:organic nursery, lettuce, seaweeds, biostimulation activity, nutrient use efficiency
Agrovoc keywords:
Greenhouse crops
Nutrient uptake
Organic fertilizers
Subjects: Crop husbandry > Production systems > Vegetables
Research affiliation: International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
Italy > CRA - National Council of Agricultural Research
Deposited By: Trinchera, Dr.ss Alessandra
ID Code:23328
Deposited On:02 Oct 2013 14:10
Last Modified:16 Oct 2014 10:58
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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