4399

4148

كارشناسي ارشد

زراعت

اصفهان،دانشگاه صنعتي اصفهان،دانشكده كشاورزي

1387

يازده،82، [II] ص: جدول، نمودار

ص. ع به: فارسي و انگلسي

مرتضي زاهدي

پرويز احسان زاده

26/12/87

محمد حسين اهتمام،اكبر رامين

1396/09/07

كتابنامه

مهندسي كشاورزي

ID4148

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractSome concerns are arising due to the decreasing levels of stratospheric ozone as a resultof industrial activities having destructive effects on biosphere through increasing levelsof ultraviolet radiation In order to evaluate the effects of UV B radiation on sesame afield experiment was conducted in the Research Farm Isfahan University of Technologyin 2007 The experiment was arranged as factorial in a randomized complete blockdesign with four replications The experimental factors were UV B at three levels UV B less light natural light and UV B enriched light and three sesame genotypes Varamin Oltan and Yekta The number of days to flowering and maturity plantheight leaf dry weight total dry matter number of capsule per plant grain yield harvest index and the leaf chlorophyll content were decreased though the specific leafweight was increased as a result of the enhanced level of UV B radiation Filtering ofthe UV B radiation led to an increase in the number of days to flowerimg and maturity plant height leaf area index number of leaves per plant and the number of seeds percapsule However the number of capsule per plant grain yield harvest index and theleaf chlorophyll content were decreased under UV B filtered light There weresignificant differences among genotypes for the number of days to flowering andmaturity plant height leaf area index leaf dry weight number of leaves per plant shootdry matter at flowering number of capsule per plant number of seeds per capsule seedweight seed oil percentage and the leaf chlorophyll content With genotypes testedhere Varamin proved superior in terms of the number of days to flowering number ofdays to maturity leaf area index leaf dry weight shoot dry matter number of capsulesper plant grain oil percentage and the grain yield The interactions between theradiation levels and genotype were significant for the number of days to maturity number of capsules per plant the number of seeds per capsule and seed oil percentage The number of days to maturity in varamin and the number of seeds per capsule inyakta under UV B filtered light and the number of capsules per plant and the seed oilpercentage under natural light were superior in Varamin The results of this studyindicate that the increased level of UV B as an environmental stress may negativelyaffect the growth and development of sesame leading to a decrease in grain yield of thisimportant oil seed crop

مرتضي زاهدي

پرويز احسان زاده

محمد حسين اهتمام،اكبر رامين