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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 1    
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scirp IJSER >> Volume 3,Issue 1,January 2012
Effect of water use efficiency on growth and yield of hot pepper under partial root-zone drip irrigation condition
Full Text(PDF, )  PP.8-21  
Tarawalie Ismail Foday, Wengang Xing, Guangcheng Shao, Chunli Hua 
— partial root-zone drip irrigation; irrigation frequency; water use efficiency (WUE); hot pepper; growth stage; ETo Evapotranspiration
Partial root-zone drip irrigation was tested to investigate effect of water use efficiency on growth and yield of hot pepper in a greenhouse condition. This study was conducted to compare effect of partial root-zone drip irrigation (PRDI) and examine how it affected soil water distribution, water use, growth, photosynthesis rate, stomatal conductance, transpiration rate and yield of hot pepper. The experiment was designed with three irrigation Schedule of 30%, 50% and I00% of ETo respectively, on four stages of plants growth; (i) Seedling and vegetative, (ii) flowering and fruit setting (iii) Vigorous fruit bearing (iv) Late fruit bearing. Irrigation water amount was calculated according to daily evaporation. There were nine treatments rows and irrigation was carried out three times per week.Results showed that, the average moisture content on both sides on each treatment was relatively constant or rose slightly as the highest was 25.20±0.23 and the lowest 21.05±069 for the right side while for the left side the highest was 24.66±0.68 and the lowest 21.59±0.22 as shown in table 3.2 and 3.3. High photosynthesis rate was recorded in treatment 1 with an initial irrigation schedule of 30% of ETo at seedling and vegetative growth, whereas, high stomatal conductance and transpiration rate were recorded in treatment 9 (control row) with I00% irrigation schedule of ETo throughout the four stages of plant growth. At 150 days after transplant hot pepper plants were harvested. The result further showed that moderate water at 50% of ETo during Vigorous fruit bearing can increase yield production and this was manifested in Treatment seven with irrigation schedule of 50% of ETo had the highest harvest yield of 3501g followed by treatment 9 (control) with 2982g and the lowest was recorded on treatment 6 with 1239g.The result also indicated that, treatments 1 and 8 also responded low to yield with 1489.86g and 1506.17g respectively, and also to dry biomass and water use efficiency, however, treatments 4, 2 and 3 recorded moderate yield. Fig 3.6 gives the full details of data analysis on yield, dry biomass and two water use efficiency
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