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ISSN : 2456-8643

Title:
SUITABILITY OF CONSTRUCTED WETLAND TREATED DOMESTIC WASTEWATER AS SOURCE OF IRRIGATION WATER AND NUTRIENTS ON COMMON BEANS (PHASEOLUS VULGARIS) PERFORMANCE IN MOROGORO, TANZANIA

Authors:
A.M.S Nyomora. J.H.Y .Katima. and Ernest B,Tanzania

Abstract:
The study was conducted from November 2014 to March 2015 at Mafisa Waste Stabilization Ponds site in Morogoro to assess the suitability of using Constructed Wetland (CW) treated wastewater as a source of nutrients and irrigation water. A yellow coloured local common bean variety (‘Kigoma’) was sown on July 27, 2014 at a spacing of 50cm between rows and 10cm between plants. The experiment was laid out as a Split-Plot in Randomized Complete Block (RCB) Design with four treatment categories namely, (i) Waste water (WW) only (ii) WW + NPK (iii) Tap water (TW) only (iv) TW + NPK in 4 replicates. Quantitative data were collected on yield and yield components namely, biomass, flowering percentage, number of beans, weight of beans, plant height, leaf length and number, fertile and sterile pods. Analysis of Variance (ANOVA) was accomplished using General Statistics (GENSTAT) software while differences between treatments categories was accomplished using Student Keul Test at (p?0.05) using INSTAT 3 statistical package. Plots irrigated with WW only resulted in relatively higher yields (0.78ton/ha) as a result of more seed weight compared to plots irrigated with Tap Water only which yielded 0.12 ton/ha only. This was attributed to the presence of nutrients in WW. The plots that received WW and NPK resulted in more foliage biomass and sterile pods implying that there was nutrients overload. More studies using improved varieties in different growing season were recommended.

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