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AL-HARBI, A., ABD-RABBO, M., FARAG, A., MEDANY, M., ABD-ELMONIEM, E. (2008). COMPARISON BETWEEN OPEN AND CLOSED HYDROPONIC SYSTEMS ON LETTUCE YIELD. Egyptian Journal of Agricultural Research, 86(2), 695-702. doi: 10.21608/ejar.2008.205772
ABEL-AZEZ R. AL-HARBI; MOHAMED ABD-RABBO; AHMED A. FARAG; MOHMOUD A. MEDANY; ESAM M. ABD-ELMONIEM. "COMPARISON BETWEEN OPEN AND CLOSED HYDROPONIC SYSTEMS ON LETTUCE YIELD". Egyptian Journal of Agricultural Research, 86, 2, 2008, 695-702. doi: 10.21608/ejar.2008.205772
AL-HARBI, A., ABD-RABBO, M., FARAG, A., MEDANY, M., ABD-ELMONIEM, E. (2008). 'COMPARISON BETWEEN OPEN AND CLOSED HYDROPONIC SYSTEMS ON LETTUCE YIELD', Egyptian Journal of Agricultural Research, 86(2), pp. 695-702. doi: 10.21608/ejar.2008.205772
AL-HARBI, A., ABD-RABBO, M., FARAG, A., MEDANY, M., ABD-ELMONIEM, E. COMPARISON BETWEEN OPEN AND CLOSED HYDROPONIC SYSTEMS ON LETTUCE YIELD. Egyptian Journal of Agricultural Research, 2008; 86(2): 695-702. doi: 10.21608/ejar.2008.205772

COMPARISON BETWEEN OPEN AND CLOSED HYDROPONIC SYSTEMS ON LETTUCE YIELD

Article 22, Volume 86, Issue 2, July 2008, Page 695-702  XML PDF (2.26 MB)
Document Type: Original Article
DOI: 10.21608/ejar.2008.205772
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Authors
ABEL-AZEZ R. AL-HARBI1; MOHAMED ABD-RABBO2; AHMED A. FARAG2; MOHMOUD A. MEDANY2; ESAM M. ABD-ELMONIEM3
1Plant production, College of Food and Agricultural Sciences, King Saud University, Al-Riyadh, King of Saudy Arabia
2Central Laboratory for Agricultural Climate, Agricultural Research Center, Dokki, Giza, Egypt
3Soils Department, Faculty of Agriculture, Ain Shams University, Shoubra El-khema, Egypt
Abstract
In the present study, lettuce production under the dosed and open hydroponic systems was investigated. The tested substrates were perlite : peat (4 : 1, v/v), sand : peat (4 : 1, v/v) and sand: peat : perlite (3 : 1 : 1, v/v/v) under different shading treatments control, i.e. (without shading), medium shading (40 % shade) and heavy shading (80 % shade). The current study was conducted with lettuce (Laciuca saliva). The total yield was higher with the closed systems compared with open ones. Perlite and perlite + peat mixture gave the highest yields among the tested substrates. The highest nutrient consumptions were obtained from perlite and perlite + peat (4 : 1. v/v). On the other hand, medium shading (40 % shade) gave the highest yield Compared with other treatments. Also, the results obtained indicated that in the closed system could save both water and nutrient consumption.
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