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An-Najah National University (2014)

Reuse of Treated Wastewater to Produce Legume Grains (case study alfalfa and vetch)

Ahmed Jabri Mohamed Lebdi

Titre : Reuse of Treated Wastewater to Produce Legume Grains (case study alfalfa and vetch)

Auteur : Ahmed Jabri Mohamed Lebdi

Université de soutenance : An-Najah National University

Grade : Master of Plant Production 2014

Résumé
This study was conducted to evaluate the production of two fodder crops ; common vetch (Vicia sativa L.), and Alfalfa (Medicago sativa L.) irrigated with treated wastewater. The study was implemented during summer 2012. Five water regimes were used in the experiment including : Irrigation with fresh water (control), fresh water supplied by 10 ppm N–P–K fertilizers, treated wastewater, treated wastewater supplied with 10 ppm N–P–K fertilizers, and treated wastewater supplied with 40 ppm N–P–K fertilizers. The crops were planted in 5 liters plastic pots in 4:1 v/v sandy to clay soil. The soil was analyzed before and after planting. The following plant parameters were recorded : Plant high, fresh weight, dry weight, leaves number per plant, fruit number per plant and fruit weight per plant. The results show that using treated wastewater significantly increased production parameters ; the highest production was obtained with treated wastewater supplied with 40 ppm fertilizers (plant height was 81.5 cm for vetch and 112.5 cm for alfalfa). Plant fresh weights for both vetch and alfalfa were higher in treated wastewater treatments than those of fresh water treatments. Regarding the dry weight, irrigation with TWW produced (33.83 g/plant and 44.67 g/plant ) compared to 22 g/plant and 24.5 g/plant for irrigation with fresh water for vetch and alfalfa respectively. The results of soil analysis show an increase in soil content of nitrogen, phosphorus and potassium, as well as an increase in the soil salinity and SAR values in pots irrigated by treated wastewater alone and in treated wastewater plus 10 and 40 ppm N-P-K fertilizer.

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Page publiée le 9 novembre 2017