Effect of Drought Stress and Foliar Application of Phosphor on Yield and Yield Components of winter Wheat
Message:
Abstract:
This research was conducted to evaluate the effect of drought stress and foliar application of phosphorus on yield and yield component of wheat in experimental field of Islamic Azad University Karaj Branch in 1387-89. The experiment performed factorial split plot based on complete randomized block design with four replication. Treatments were included: four levels of phosphor foliar application 0¡2¡4¡6 kg/ha from the source of KH2PO4)¡ three levels of drought stress (40% ¡ 60% and 75% available moisture reduction) and two growth stage based on Fix method(stage 7)(second node appearance) and stage 10/1(appearance of spike). Yield and yield components were measured at the harvest time. Results showed significant difference among irrigation treatments. Minimum seed yield obtained in 75% available moisture reduction and maximum yield obtained in 40% available moisture reduction . Results also showed that foliar application of phosphor increased significantly seed yield ¡ biological yield¡ peduncle length¡ number of spike in unit area¡ number of grain per spike and plant height. Maximum grain yield obtained from six kg/ha phosphor treatment and minimum grain yield obtained in control treatment. Triple interaction showed significant effect on seed yield. Irrigation in 40% available moisture reduction treatment in the appearance time of second node and appearance of spike time showed maximum yield with application of six kg/ha phosphor foliar application. Irrigation in deficit irrigation treatment (60% available moisture reduction) and in spike appearance time showed maximum yield with six kg/ha phosphor foliar application. In deficit irrigation treatment (75% available moisture reduction)¡ foliar application of phosphor showed no yield increase and all foliar application phosphor treatment arranged in a same order in Duncans test.
Language:
Persian
Published:
Journal of Agronomy and Plant Breeding, Volume:11 Issue: 3, 2015
Page:
118
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