ISHS Acta Horticulturae 554: World Congress on Soilless Culture: Agriculture in the Coming Millennium
COMPARISON OF OPEN AND CLOSED SYSTEMS ON YIELD, WATER AND NUTRIENT CONSUMPTION AND THEIR ENVIRONMENTAL IMPACT |
| Authors: | I.H. Tüzel, Y. Tüzel, A. Gül, M.K. Meriç, O. Yavuz, R.Z. Eltez |
| Keywords: | Substrate culture, tomato, open and closed systems, yield, water and nutrient consumption. |
| Abstract:
This research was conducted in an unheated greenhouse during autumn and spring seasons in 1998 and 1999 to compare different substrates in open and closed systems for tomato production. The tested substrates were perlite, volcanic tuff, perlite + peat (4:1, v/v) and volcanic tuff + peat (4:1, v/v). Substrates were filled into horizontal containers as 8 litres per plant. Cultivars Gökçe F1 and FA 361 F1 were grown in autumn and spring seasons, respectively. There were no significant differences between open (15.7 and 19.0 kg/m2) and closed systems (17.0 and 18.0 kg/m2) in respect to total yield. Perlite and peat mixture gave the highest yields in both seasons among the tested substrates. The total water consumption ranged between 51.1 and 69.8 l/plant in autumn and from 91.2 to 119.0 l/plant in the spring, whereas the total nutrient consumption changed between 37.1 and 45.6 g/plant in autumn and 66.7 and 82.1 g/plant in spring. Regarding the substrates, the highest water and nutrient consumptions were obtained from perlite + peat (4:1, v/v). The results obtained indicated that in the closed system could save up to 24 % water and 34 % nutrient. | |
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