Determination of Bean water productivity in sprinkler and furrow irrigation systems(Case study: Lorestan province)

Determination the water consumption and water productivity of different products can be a great help to the decision-making of water and agriculture officials. Therefore, the present study was conducted to measure water consumption and the yield of bean at 25 fields managed by farmers in Azna, Aligudarz and Selseleh counties in Lorestan province. Thus, the volume of water consumed for bean were measured in the selected fields with different irrigation methods and various water sources without interfering with their irrigation scheduling during the growing season. The amount of water consumption under different irrigation systems varied from 8669 to 19312 m3.ha-1. The average of water consumption and water productivity in sprinkler and surface irrigation systems were 9735, 16161 m3.ha-1 and 0.33 and 0.16 kg .m-3, respectively. Therefore, it can be said that sprinkler irrigation compare to surface irrigation system increased the water productivity and reduced water consumption about 106 and 39.8 percent, respectively. The average of irrigation efficiency in both sprinkler and surface irrigation systems determined about 67.5% and 35.7%, respectively. The results of comparing the average volume of water consumption, water productivity and irrigation efficiency with t-test showed a significant difference between sprinkler and surface irrigation systems. Comparison of average water requirement by using t-test showed that The average computational water requirement differs significantly from the national average water document by 6720 and 6994 m3.ha-1, respectively. Investigation of correlation coefficients showed indirect changes in water consumption with irrigation efficiency and water productivity. However, the relationship between irrigation efficiency and crop yield has been consistent and positive with water productivity