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NFT controlled -environment factors affecting production of green fodder [electronic resource]

By:

MOSALLAM , M. A

Contributor(s):

Language: English Summary language: Arabic Description: p. 697-712Other title:

عوامل التحكم البينية المؤثرة علي إنتاج العلف الاخضر بتقانة الغشاء المغذي NFT [Added title page title]

Uniform titles:

Misr Journal of Agricultural Engineering, 2016 v.33 (2) [electronic resource]

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Full Text Article

In: Misr Journal of Agricultural Engineering 2016.v.33(2)Summary: 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 NFTunit without cultivation, Mosallam et al.,2015) this depth and this speed are 3mm 0.1mls . respectively. concentrations of the nutrient solution 1 %. lighting type :Iight-emitting diodes (LEDs) , lighting exposure: 12h/day and air change rate of40 times/h.

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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 NFTunit without cultivation, Mosallam et al.,2015) this depth and this speed are 3mm 0.1mls . respectively. concentrations of the nutrient solution 1 %. lighting type :Iight-emitting diodes (LEDs) , lighting exposure: 12h/day and air change rate of40 times/h.

Summary in Arabic

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