In order to study of sewage and water ratios and morphological traits, yield and yield components of four forage species including maize (Zea may var.SC704), sorghum (Sorghum bicolor var.Sugar graze and Speedfeed) and millet (Pennisetu of m americanum var.nutrifeed), an experiment was done in research station of Industrial and Agricultural Institute of Astane Ghodse Razavi, Mashhad, during 2001 growing season. The experiment was done as split plot design based on randomized complet block design with four replications. Treatments including as 0%, 25%,50%,75% and 100% sewage and water ratios in main plots respectivily, and four forage species (maize, sorghum (two cultivars) and millet) in sub plots. Morphological traits such as height of plant, diameter of stem, number of tillers per plant, percentage of leaves, stems, leaf sheath, inflorescence and dry matter yield were recorded. The results showed that significant differences existed among the sewage and water ratios treatments on height of plants, diameter of stems, number of tillers per plant and dry matter yield at 1% probability
level. With increasing the different sewage and water ratios to 75%, height of plants and to 100%, diameter of stem and dry matter yield were increased. There were no significant differences between different levels of sewage and water ratios on percentage of leaves, stems, leaf sheath and inflorescence. There were significant differences between different forage species at all parameters. Intraction between different levels of sewage and water ratios and four forage species was not significant. The highest dry matter yield was belong to sorghum (var. sugar graze) at 100% sewage and water ratios with 23.1 t./ha and the lowest dry matter yield was obtained in forage millet at fresh water (check) with 11.0 t./ha. |
