Evaluation of the Impacts of Selected Trace Elements and Salinity on the Growth, Yield, and Uptake of Bell Pepper Grown Under Sequential Vertical Flow Hydroponic Conditions

Discussion Committee: 
Prof. Dr. Marwan Haddad / Supervisor
Dr. Abdullah Alomari / External examiner
Dr. Hassan Abu Qaoud (Internal examiner
Prof. Dr. Marwan Haddad / Supervisor
Nour “Lutfi Mohamed” Hassan Al- Husain
This study aims at assessing the growth and productivity of sweet pepper under special circumstances in two experiments. The first of them was conducted with three salinity concentrations of NaCl. The second was conducted using some heavy minerals which are Cu, Cr, Cd, and Zn. Both experiments were conducted under under Sequential Vertical Flow Hydroponic Conditions. The experiment was conducted using 26 containers arranged in pairs, one of each pair for growing the pepper and the other for collecting the leaking water. The containers were arranged in rows, each row represents the kind of treatment. The fifth row was left with one pair of containers for the blank sample. The water that was used to irrigate the plant in the first container in each row was used to irrigate the next container in the same row. The first row was treated with the first salinity treatment (S1) with a concentration of 1000 ppm, the 2nd row with (S2) treatment with a concentration of 3000 ppm, and the 3rd row with (S3) treatment with a concentration of 7000 ppm. The 4th row was treated with trace metals (TM) with a concentration of 0.2 ppm for each metal. The water was manually stirred every day. The number of leaves, buds, and fruit was calculated. The length of stems was measured before and after adding the salinity solutions and the selected heavy minerals. Salinity was measured with the (EC) device with the (µs) unit while the concentration of the heavy minerals was measured using (ICPMS). A continuous increase was noticed in the parts of the sweet pepper when adding the heavy metals .These parts were affected when the solutions were added. This was clearly noticed when the leaves fell and lost connection with the stem. Statistical differences also appeared at ( α =0.05) for the third salinity treatment (S3). The same was also noticed about the stem and roots. Statistical differences were also noticed on the fruit of the first salinity treatment (S1) and mainly on the first container. No statistical differences were noticed when comparing all concentrations as a whole, which shows that the number of fruits was not clearly influenced by salinity. As for the experiment of the trace metals (TM), it was noticed that Cu concentrated in the roots, while Zn concentrated in the fruits. As for the Cd, it concentrated most in the roots and leaves. Cr was most in roots. It was also noticed that those minerals had contradictory effects as was reflected in the different concentrations of these minerals in the parts of the hot pepper. The exterior effect of the plant was not clearly influenced. The danger of these minerals lies in their accumulation in the edible parts of the fruit.
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