Abstract
In order to study the effect of drought stress on morphological and physiological characteristics of millets, a field experiment was arranged in a randomised complete block as a split-plot design with three replication during 2004 growing season at Reasearch Farm of Ferdowsi University of Mashhad. Irrigation intervals (weekly interval, 14-day interval) and three types of millet (Pennisetum glaceum , Setaria italica and Panicum miliaceum) were allocated to main and sub plots, respectively. Results showed that, grain yield, panicle weight, grain weight, number of tillers, number of fertile tillers, panicle harvest index, leaf area and percentage of nitrogen leaf was not affected by water stress treatments. Although, type of millets had significiant effect on these traits. Exposure of plants to water stress led to noticeable decreases in plant height for all three cultivars. In this experiment, grain yield, plant height, panicle weight, grain weight, panicle harvest index and percentage of nitrogen of Panicum miliaceum was lowest, also Pennisetum glucum had relatively highest grain leaf yield, panicle weight, leaf area and percentage of leaf nitrogen and had favorable production potential in semi-arid tropical regions.
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