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Effect of the Stratification of Perlite by Particle Size on the Growth and Yield of Tomato in a Recycling Hydroponics  

강경희 (영남농업시험장 부산원예시험장)
권기범 (영남농업시험장 부산원예시험장)
최영하 (영남농업시험장 부산원예시험장)
이한철 (영남농업시험장 부산원예시험장)
Publication Information
Journal of Bio-Environment Control / v.12, no.2, 2003 , pp. 83-88 More about this Journal
Abstract
The effect of vertical stratification of perlite by particle size on the growth and yield of tomato In a recycling hydroponics was examined. Vertical stratifications were composed of mixed form of small medium and large size (MP), divided forms of small and large size (smal1/1arge, DP I), and medium and large size (medium/large, DP II). Tomatoes showed higher growth in divided form, specially in DP II than DP I. Deformed fruits had higher occurrence by 17.8% in the mixed form than divided forms, while they were not significantly different between mixed forms. Root activity tended to increase during 20 days to 50 days after transplanting (DAT) in all treatments, but showed highest value at 50 DAT in DP II. After harvest electric conductivity and pH of stratified perlite were slightly higher in upper zone of DP I, but were not different in the other treatments. Mineral contents in the medium after harvest were higher in lower zone than the upper zone in MP and DP II, but vice versa in DP I.
Keywords
Growth stage; deformed fruit; root activity; mineral content; EC;
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