Davood Afiuni; Amir Houshang Jalali; Reza Khakpour; Leili Safaei; Tohid Najafi-Mirak; Gholamali Akbari
Abstract
In order to assess the impact of different sowing dates on yield and yield components of wheat genotypeswith different growth habits, a two years study (2007-2009) using a split plot in randomized completeblock design with three replications was conducted in Kabootarabad Agricultural Research Station ...
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In order to assess the impact of different sowing dates on yield and yield components of wheat genotypeswith different growth habits, a two years study (2007-2009) using a split plot in randomized completeblock design with three replications was conducted in Kabootarabad Agricultural Research Station ofIsfahan. Three sowing dates of 12 Oct., 1 Nov., and 21 Nov. were main plots and 15 genotypes of wheatwere subplots. The average grain yield in three planting dates was 8495, 9156 and 6749 kg ha-1,respectively. At all planting dates, the maximum and minimum grain yield belonged to spring and wintertypes and the grain yield of winter, facultative and spring groups were 7519, 8267 and 8614 kg ha-1,respectively. At 1 Nov. five spring genotypes M-81-13, Bahar, Pishtaz, Kavir and Marvdasht andfacultative cultivar Alvand produced the highest grain yield by an average of 10433, 10146, 10040, 9843,9822 and 9813 kg/ha and therefore can be recommended for planting in temperate regions of theprovince. Spikes per m2 and grain weight were the most important yield components that were reduced inresponse to late planting. Based on the results, 1 Nov. can be recommended as the best planting date forthe region.
Davud Afyuni; Ali Reza Marjovvi
Volume 11, Issue 2 , November 2009, , Pages 1-10
Abstract
In order to evaluate salinity tolerance of six bread wheat varieties, an experiment was conducted during 2000-02 crop seasons in Roudasht Salinity Research Station, Esfahan. Effects of three levels of irrigation water salinities (four, eight and 12 dS m-1) were studied on six bread wheat cultivars including ...
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In order to evaluate salinity tolerance of six bread wheat varieties, an experiment was conducted during 2000-02 crop seasons in Roudasht Salinity Research Station, Esfahan. Effects of three levels of irrigation water salinities (four, eight and 12 dS m-1) were studied on six bread wheat cultivars including Pishtaz, Shiraz, Mahdavi, Marvdasht, Kavir and Roshan. Increase in salinity level of irrigation water caused significant decrease in grain yield, number of spikes per m2, days to physiological maturity, plant height and grain filling period. Among the varieties, Roshan and Shiraz had the minimum reduction percentage in grain yield in 12 dS m-1 compared to 4 dS m-1. In 12 dS m-1, Roshan and Shiraz produced 3987 and 3607 kg ha-1 grain yield, respectively and had the highest grain yield values among the varieties. Roshan also had the highest amounts of MP, GMP and STI (4257, 4248 and 1.20, respectively) and the lowest amounts of Tol and SSI (539 and 0.66, respectively), thus was the most tolerant cultivar to salinity among the studied cultivars. Based on the tolerance and susceptibility indices, Marvdasht was the most susceptible cultivar to salinity.