Articles
Fertigation strategy to reduce nitrate emission from greenhouse tomato grown in a semi-closed perlite system
Article number
1253_24
Pages
177 – 182
Language
English
Abstract
The goal of the present study was to evaluate the effect of two different fertigation strategies to reduce nitrate emission on the yield and fruit quality of a tomato crop grown on a greenhouse semi-closed soilless system.
The compared strategies were: (N+) crop water uptake was compensated by refilling the mixing tank with full strength nutrient solution, and flushing out the recirculating nutrient solution when Na+ accumulation exceeded 15 mM, and (N-) which differed in that when Na+ accumulation reached 15 mM, crop water uptake was compensated with fresh water only which was done to reduce the NO3– concentration during 2-4 days before discharge.
The nutrient supply reduction with the strategy (N-) did not affect quality and yield of tomato crop and contributed to reduce the NO3– emissions.
The compared strategies were: (N+) crop water uptake was compensated by refilling the mixing tank with full strength nutrient solution, and flushing out the recirculating nutrient solution when Na+ accumulation exceeded 15 mM, and (N-) which differed in that when Na+ accumulation reached 15 mM, crop water uptake was compensated with fresh water only which was done to reduce the NO3– concentration during 2-4 days before discharge.
The nutrient supply reduction with the strategy (N-) did not affect quality and yield of tomato crop and contributed to reduce the NO3– emissions.
Authors
E. Medrano, P. Lorenzo, M.C. Sánchez-Guerrero
Keywords
Cucumis sativus, Lycopersicon esculentum, water, nutrition, vegetables
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