CLAY POT IRRIGATION AND PLANTING DENSITY EFFECT ON LETTUCE YIELD                                              Abubakari A-...
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Clay pot irrigation and planting density effect on lettuce yield - Abdul-Halim Abubakari, Nyarko G. and Maalinyuur Sheila, Lecturer, Faculty of Agriculture, University for Development Studies, Ghana

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Clay pot irrigation and planting density effect on lettuce yield - Abdul-Halim Abubakari, Nyarko G. and Maalinyuur Sheila, Lecturer, Faculty of Agriculture, University for Development Studies, Ghana

  1. 1. CLAY POT IRRIGATION AND PLANTING DENSITY EFFECT ON LETTUCE YIELD Abubakari A-H., Nyarko G. and Maalinyuur Sheila Department of Horticulture, Faculty of Agriculture. University for Development Studies, Tamale, Ghana Email: halim7us@yahoo.comIntroduction Results and Discussions•Climate change and urbanisation are the most •CPSI resulted in significantly higherimportant drivers of changing quantity and plant height than the watering canquality of irrigation water irrigation (Figure 1)• Increased domestic and industrial uses of •CPSI also resulted in higher fresh andwater is already generating huge quantities of dry weight of leaves and roots than thewastewater watering can irrigation (Figure 2 & 3, Table 1 and 2)•52 % of farmers in Tamale, Ghana, depend oneither wastewater or grey water for all year •The 15 cm x 15 cm spacing wasround vegetable production Plate 2. Lettuce plants set up  in CPSI, with  comparable with the 20 cm x 20 cm and mosquito net to filter sediments Plate 3. lettuce under Water can irrigation the 30 cm x 30 cm in all parameters•Feacal coliform (FC) and Total coliform (TC) studied under CPSIin Vegetables irrigated with wastewater inTamale was found to exceed the International •The 15 cm x 15 cm spacing was superiorCommission for Microbiological Specification to 20 cm x 20 cm and 30 cm x 30 cm infor Food (103 faecal coliform g-1) all parameters measured under watering•Wastewater irrigation especially with watering can irrigationcan exposes vegetables to FC and heavy metals •The superior performance of CPSI over•WHO recommends treated wastewater for watering can irrigation may be due to theirrigation, centralised treatment and other fact that CPSI release the water graduallyconventional treatment methods are expensive Figure 1. Effect of irrigation types and spacing  Figure 2. Effect of irrigation types and spacing on  allowing a more stable soil moisture on plant height (bars = 2 x SED). fresh weight of leaves (bars = 2 x SED). regime than the watering can irrigation•Low cost treatment include: Clay pot sub-surface irrigation (CPSI) •The poor performance of the 20 cm x 20 Bucket kit irrigation cm and 30 cm x 30 cm under the watering Good wastewater irrigation practices can irrigation may attributed to their inability to effectively utilise all the water providedObjectives•To determine the appropriate wastewater •Preliminary vegetative sample analysisirrigation type and spacing on growth and of both CPSI and water can plots did notyield of lettuce show the presence of either FC or TC on lettuce leaves•To determine the effectiveness of CPSI inreducing the level of Feacal coliform (FC) andTotal coliform (TC) on wastewater irrigated Conclusionslettuce •Clay pot irrigation with wastewater and spacing of 15 cm x 15 cm significantlyMethodology enhanced lettuce growth and yield as was•Irrigation type: CPSI and watering can reflected in parameters like plant height, fresh and dry weight of leaves and roots•Spacing (cm): 15 x 15, 20 x 20 and 30 x 30 •It was clear from the experiment that•Treatments combinations: 6 yield parameters (fresh and dry biomass) were increased significantly by Clay pot•Replications: 3 irrigation and spacing of 15 cm x 15 cm Plate 3. Lettuce grown under  CPSI and ready for harvesting either acting independently or in•Experimental Design: CRD combination•Container capacity (cm): 50 diameter, 20 height Recommendations•Wastewater application: 500 ml of water daily •Clay pot wastewater irrigation at a spacing of 15 cm x 15 cm should be•Study parameters: adopted by poor urban farmers Plant height , fresh weight and dry weight • Further test should be carried out to•Data Analysis determine pathogen reduction by CPSI ANOVA, using Genstat statistical package Plant height, fresh and dry weight were square Figure 3. Effect of irrigation types and spacing  on fresh  Acknowledgementroot transformed to normalize the errordistribution before the analysis. weight of roots (bars = 2 x SED) International Foundation for Science (IFS), Stockholm, Sweden supported this Table 3. Effect of irrigation types and spacing  Table 3. Effect of irrigation types and spacing  project through a grant to Mr. Abubakari on the dry weight of leaves on the dry weight of roots Abdul-Halim. Thanks to the CTA for Irrigation 15 × 15 cm 20 × 20 cm 30 × 30 cm Irrigation 15 × 15 cm 20 × 20 cm 30 × 30 cm providing travel funds to present this Clay pot 0.921 b 1.142 a 1.254 a Clay pot 0.1821 b 0.2431 a 0.2562 a paper at CTA 2010 Annual Seminar in Water can 1.154 a 0.645 b 0.754 b Water can 0.2205 a 0.1520 b 0.1715 b Johannesburg, South Africa F probability 0.044 0.044 0.044 F probability 0.008 0.008 0.008 SED 0.392 0.392 0.392 SED 0.0536 0.0536 0.0536 D.F 12 12 12 D.F 12 12 12 Plate 1.  set up  of CPSI REP 3 3 3 REP 3 3 3

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