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Effects of soil, root mycorrhization, organic and phosphate fertilization, in organic lettuce production


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Brito, L Miguel; Sampaio, Áurea; Pinto, Rui; Mourão, Isabel and Coutinho, João (2014) Effects of soil, root mycorrhization, organic and phosphate fertilization, in organic lettuce production. In: Rahmann, G. and Aksoy, U. (Eds.) Building Organic Bridges, Johann Heinrich von Thünen-Institut, Braunschweig, Germany, 3, Thuenen Report, no. 20, pp. 925-928.

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The influence of organic and phosphate fertilization, and root mycorrhization, in organic lettuce production, was assessed with factorial treatment combinations of: soil type (SOP – soil from organic and SCP – soil from conventional production) and organic fertilizer (0, 2 and 4 t ha-1) in the first trial; mycorrhizal inoculation (mycorrhized and non-mycorrhized plants) and Gafsa phosphate (0, 100 and 200 kg P2O5 ha-1) in the second. Lettuce yield decreased in the SCP with the application of increasing rates of organic fertilizer due to the very high electrical conductivity (50.1 dS m-1) and lack of maturation of this fertilizer. However, the harmful effects of the organic fertilizer were minimized in the SOP. The application of increasing rates of Gafsa phosphate increased lettuce yield and nutrient uptake. However, the mycorrhization did not increase lettuce yield and, for mycorrhized lettuces, yield did not increase with the highest rate of Gafsa phosphate application.

EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Agrovoc keywords:
EnglishElectrical conductivityhttp://aims.fao.org/aos/agrovoc/c_24022
EnglishOrganic fertilizershttp://aims.fao.org/aos/agrovoc/c_4592
Subjects: Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Crop husbandry > Production systems > Vegetables
Farming Systems > Farm nutrient management
Research affiliation: International Conferences > 2014: 18th IFOAM OWC Scientific Track: 4th ISOFAR Scientific Conference
Deposited By: Brito, Professor Luis Miguel
ID Code:23031
Deposited On:15 Oct 2014 13:17
Last Modified:15 Oct 2014 13:17
Document Language:English
Refereed:Peer-reviewed and accepted
Additional Publishing Information:urn:nbn:de:gbv:253-201407-dn053621-1

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