ISHS Acta Horticulturae 761: XXVII International Horticultural Congress - IHC2006: International Symposium on Advances in Environmental Control, Automation and Cultivation Systems for Sustainable, High-Quality Crop Production under Protected Cultivation
EFFECTS OF DRIP FERTIGATION ON NUTRIENT UPTAKE, GROWTH, YIELD AND FRUIT QUALITY OF FORCING CULTURE TOMATO (LYCOPERSICON ESCULENTUM MILL. VAR. HOUSE-MOMOTARO) UNDER GREENHOUSE |
| Authors: | Y. Araki, H. Yamaguchi |
| Keywords: | electric conductivity, nitrogen, petiole sap, soluble solid, watering |
| Abstract:
In this report, usefulness of drip fertigation (Experiment 1) and possibility of fertilizer reduction (Experiment 2) were studied for forcing culture tomato under greenhouse. In Experiment 1, drip fertigation was efficient with a 23% saving in water compared with surface irrigation. Drip fertigation was also efficient with a 30% saving in fertilizer compared with the applying system of basal and additional fertilizer (control). Growth and yield were the biggest in 30%-reduction treatment, and standard (drip fertigation with the same fertilizer quantity applied as control) was big as same as control in growth and yield. Fruit sugar content in control and standard changed higher than 30%-reduction. In Experiment 2, mineral elements in the plant increased as fertilizer quantity applied decreased. This increase of mineral elements was considered to promote the plant growth and yield the same as in Experiment 1. Sugar contents of fruit over forth cluster decreased as fertilizer quantity applied decreased. This phenomenon was the same in Experiment 1. In tomato, sugar content of fruit decreased as nitrogen quantity applied increased. In conclusion, drip fertigation is effective in tomato cultivation under greenhouse and it enables to save 50% fertilizer. But under low input condition, fruit sugar content is apt to become lower. | |
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