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Influence of Salinity and Nitrogen Levels on Growth, Yield and Nutrients Uptake of Tomato in Hydroponics Culture

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Author(s): M. Zahedifar | A. M. Ronaghi | S. A. A. Moosavi | S. Safarzadeh Shirazi

Journal: Journal of Science and Technology of Greenhouse Culture
ISSN 2008-9082

Volume: 1;
Issue: 2;
Start page: 31;
Date: 2010;
Original page

Keywords: Salinity | Hydroponics | Tomato | Nitrogen | Nutrients uptake.

ABSTRACT
This experiment was conducted to determine the effect of salinity and nitrogen on growth and yield of tomato and concentration and total uptake of some nutrients in different parts of plant in hydroponics culture. Nitrogen (N) was used at 0, 1.5 and 3% levels as NH4Cl and NH4H2PO4 and salinity consisted of 0, 30 and 60 mM as NaCl and CaCl2 (2:1 w/w). A completely randomized design experiment was carried out under greenhouse conditions. Results showed that fruit fresh weight increased with N application but salinity treatment decreased fruit yield. Maximum fresh weight was observed in treatment with 3% N and without any salinity application, whereas minimum fresh weight was obtained with 30 mM salinity and without any N application. Application of 30 and 60 mM salinity increased fruit phosphorous concentration significantly (P
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