Effects of Irrigation Levels on Growth Characteristics and Yield of Four Ecotypes of Sesame (Sesamum indicum L.)

Document Type : Research Article


Ferdowsi University of Mashhad


In order to study the effects of irrigation levels on growth criteria, yield components and seed yield of four ecotypes of sesame (Sesamum indicum L.), a field experiment was conducted as factorial based on a randomized complete block design with three replications at the Agricultural Research Station, Ferdowsi University of Mashhad, during growing season 2010-2011. Three irrigation levels (2000, 3000 and 4000 m3 ha-1) and four ecotypes (Darab, Sabzevar, Kashmar and Kalat) were allocated as treatments. Criteria such as leaf are index (LAI), dry matter (DM) accumulation, yield components (branch number, capsule number, seed number and 1000-seed weight), biological yield and seed yield of sesame were measured, accordingly. Results indicated that the simple effects of irrigation levels and ecotypes were significant (p≤0.05) on yield and yield components of sesame. Interaction between irrigation levels and ecotypes for yield components, biological yield and seed yield were significant (p≤0.01). By increasing water level from 2000 to 4000 m3 ha-1 enhanced branch number, capsule number, seed number and 1000-seed weight up to 57, 55 and 36%, respectively. Seed yield of Kalat was higher than Darab, Sabzevar and Kashmar with 1, 7 and 11%, respectively. By enhancing irrigation from 2000 to 4000 m3.ha-1 seed yield of Darab, Sabzevar and Kashmar and Kalat increased with 15, 67T 62 and 34%, respectively. There was a positive and significant relationship between yield and yield components. The highest correlation coefficient was observed for 1000-seed weight (r=0.87**).


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