Articles
CHLORINATION RATES UTILIZED IN TOMATO (SOLANUM LYCOPERSICUM ‘SUNNY’) TRANSPLANT PRODUCTION IN A FLOATATION IRRIGATION SYSTEM
Article number
898_27
Pages
219 – 225
Language
English
Abstract
When irrigation water is recycled for the production of transplants there is an increased likelihood for the spread of water-borne diseases such as those caused by Phytophthora sp. and Pythium sp.
An option to reduce the risk of disease is to utilize chlorination of the recycled solution, however there can be phytotoxicity associated with the use of chlorine.
Three greenhouse experiments were conducted with tomato (Solanum lycopersicum Sunny) in Immokalee, FL. The objective of the experiments was to determine chlorination impacts on transplant growth.
Chlorination treatments (0, 1, 5, 10, 20, 40, and 80 mg/L) were applied via floatation irrigation to plants grown in large and small cell sizes at both 3 and 5 weeks after seeding.
Data collected included whole plant fresh weights, shoot fresh weights, root fresh weights, leaf area, and whole plant dry weights.
Treatments chlorinated at 40 and 80 mg/L had less leaf area and whole plant dry weights relative to the other chlorination treatments.
Shoot fresh weights for treatments chlorinated at 5 mg/L were greater as compared to all treatments chlorinated at a higher concentration.
Thresholds for chlorination of recycled water/nutrient solu¬tion for production of normal tomato transplants (5 weeks) were up to 20 mg/L. Chlorination at a rate as high as 20 mg/L is effective in eliminating pathogens such as Phytophthora sp. and Pythium sp.
An option to reduce the risk of disease is to utilize chlorination of the recycled solution, however there can be phytotoxicity associated with the use of chlorine.
Three greenhouse experiments were conducted with tomato (Solanum lycopersicum Sunny) in Immokalee, FL. The objective of the experiments was to determine chlorination impacts on transplant growth.
Chlorination treatments (0, 1, 5, 10, 20, 40, and 80 mg/L) were applied via floatation irrigation to plants grown in large and small cell sizes at both 3 and 5 weeks after seeding.
Data collected included whole plant fresh weights, shoot fresh weights, root fresh weights, leaf area, and whole plant dry weights.
Treatments chlorinated at 40 and 80 mg/L had less leaf area and whole plant dry weights relative to the other chlorination treatments.
Shoot fresh weights for treatments chlorinated at 5 mg/L were greater as compared to all treatments chlorinated at a higher concentration.
Thresholds for chlorination of recycled water/nutrient solu¬tion for production of normal tomato transplants (5 weeks) were up to 20 mg/L. Chlorination at a rate as high as 20 mg/L is effective in eliminating pathogens such as Phytophthora sp. and Pythium sp.
Publication
Authors
S.K. Saha, C.S. Vavrina, D.J. Cantliffe
Keywords
fresh market vegetables, water availability, cell size, water treatment, closed-system, Pythium sp., seedlings
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