NFT CONTROLLED – ENVIRONMENT FACTORS AFFECTING PRODUCTION OF GREEN FODDER | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 21, Volume 33, Issue 2, April 2016, Page 697-712 PDF (806 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2016.98014 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. A. MOSALLAM1; M. E. SHETAWY2; R. R. EL-BESSOUMY3; T. ABDEL - FATTAH4 | ||||
| 1Prof., Fac. Ag. Eng., AL- Azhar univ., Cairo, Egypt. | ||||
| 2Assoc – prof., Fac. Ag. Eng., AL- Azhar univ., Cairo., Egypt. | ||||
| 3Lec.; Fac. Ag. Eng., AL- Azhar univ., Cairo, Egypt. | ||||
| 4Teachg. Assist. Fac. Ag. Eng., AL- Azhar univ., Cairo, Egypt. | ||||
| Abstract | ||||
| A Nutrient-Film Technique "NFT" and A semi- Environmental control chamber were used to detect the effect of slope and environmental parameters affecting the NFT. The environmental parameters are : concentration of the nutrient solution "NS" , lighting type and light exposure and air change per hour. Four slopes were tested ;from: 5 to 25%. Three concentrations were tested: from: 0.5 to 1.5% in addition to tap water as control. Three types of lighting were tested: light- emitting diodes (LEDS) , fluorescent lamps and compact fluorescent lamps (CFLS) in addition a natural light as control. Four lighting times were tested: from: 6 to 24 h/day. Four airing rates were tested: from 30 to 60 times per hour. The optimal parameters for transplanting fodder are : the slope of NS channel of 5%, the feed pump discharge of 4.66 L/min under cultivating density of 1.6 kg/m2 and the discharge corresponds to an empirical depth and an empirical speed of the NS(measured from a previous study of NFT unit without cultivation, Mosallam et al.,2015) this depth and this speed are 3mm 0.1m/s , respectively, concentrations of the nutrient solution 1 % , lighting type :light-emitting diodes (LEDS) , lighting exposure: 12h/day and air change rate of 40 times/h. | ||||
| Keywords | ||||
| nutrient-film technique; semi- environmental control chamber; LED light source; nutrient solution; air change rate | ||||
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