Responses of Different Maturity Type Wheat’s Cultivar to Planting Date at Moderate Regions in Iran

Abstract

Aims: Investigationof responses of different maturity type wheats cultivar to planting date. Study Design:A split-plot arrangement within a randomized complete block design with 4 replication. Place and Duration of Study: This study was carried out from 2007-2008 in Neyshabur agricultural research station. Methodology: Theeffect of planting date and maturity type wheats cultivar on yield components containing spike number at square meter, spike number p er spike, seed number at spikelet, seed number at spike, 1000 seed weight, economic yield and biological yield were assessed.Planting date (11 oct, 15, nov, 30nov) as a main plot andmaturity type wheats cultivar (Alamot and Mv17 9(winter type) Toos and A lvand (intermediate type) Marvedasht and Pishtaz (spring type) as sub plot. Results:The result showed that the number of tillers, number of spike, number of grains spike and biological yield was not affected by the planting date. The maximum and minimum economic yield was obtained on November 30th and October 11th, respectively. Yield components were not affected by maturity type. Wheat cultivar had a different response to planting date. With a delay in planting date, winter type had more of a decrease ineconomic yield than spring and intermediate types. Decreases of spike Original ResearchArticle