Document Type : Original Article
Authors
1 M.Sc Student of Agronomy, Faculty of Agriculture, Zabol University, Iran
2 Associated Prof. Faculty of Agriculture, Zabol University
Abstract
In order to investigate the time of potassium application and irrigation regimes effects on agronomic traits, yield and seed quality of foxtail millet, a field experiment was conducted as split plot based on randomized complete block design with three replications at Agricultural Research Center of Yasuj, Iran, during 2009. The irrigation regimes including 7, 14 and 21 day intervals were considered as main plots and sub-plots included potassium fertilizer application at four stages of planting, tillering, stem development and flowering. The results showed that the effect of irrigation regimes was statistically significant on plant height, leaf number, ear size, grain yield, leaf chlorophyll content, water soluble carbohydrate and protein percentage. Increasing the irrigation period, decreased all of the above mentioned traits except protein percentage which was enhanced by increasing the irrigation period. Also the time of potassium application significantly affected plant height, grain yield, leaf chlorophyll content, water soluble carbohydrate and protein percentage, so that potassium application until flowering stage increased the studied traits. The interaction effects of irrigation and potassium application on plant height, seed yield, leaf chlorophyll and soluble carbohydrates was significant. The maximum seed yield was obtained by using potassium at the stem development stage and 7- day irrigation regime, and the maximum seed protein percentage was obtained in 21- day irrigation regime and potassium application at flowering stage.
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