List of Articles تنش آبیاری

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  1 - Physiological responses of sweet corn under water deficit and nitrogen rates at different growth stages
  A. Shahriari A.B. Puteh A.B. Abdul Rahim G.B. Saleh
  Water deficit is one of the main factors limiting production in arid and semiarid regions. This study was carried out to investigate the effect of the interaction of water deficit  and N fertilizer rate on relative water content, proline content, leaf chlorophyll c More

  Water deficit is one of the main factors limiting production in arid and semiarid regions. This study was carried out to investigate the effect of the interaction of water deficit  and N fertilizer rate on relative water content, proline content, leaf chlorophyll content,  pollen number  and pollen viability, photosynthesis rate and stomata conductance parameters in two hybrid sweet corn ( 968 and 926) in greenhouse condition. The experimental layout was split plot factorial design arranged in a randomized complete block design with three replications in 2010 in the Agriculture Crop Science, Putra University Malaysia (UPM). Treatments consisted of four levels of irrigation (including irrigating all the growing season (control), vegetative drought, reproductive drought and vegetative and reproductive drought), three levels of Nitrogen as urea (40, 120 and 200 kg ha-1) and two varieties of sweet corn varieties (including hybrids 968 and 926), respectively. Results showed that the interaction effects of water deficit and Nitrogen fertilizer were significant and reduced leaf chlorophyll content, photosynthetic rate and stomata conductivity under water and Nitrogen rate deficit. Also the results showed that water deficit at vegetative and productive growth stages reduced photosynthesis rate compared to normal irrigation by 54% and 84%, respectively.  But Nitrogen treatments at 200 and 120 kg ha-1 did not show any significant decrease in stomata conductivity. Whereas. Proline content increased under water deficit. Pollen number reduced with water and nitrogen deficit. Pollen viability reduced only under water deficit by 39%. Manuscript profile
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  2 - Comparison of drought tolerance index on morphological and agronomical traits in black Bean (Phaseolus vulgaris L.)
  M. Safapour Sh. Khaghani M. Teymoori
        In order to evaluate the effect of water deficit stress (limited irrigation) on different traits of bean. Ten bean genotypes were planted in a randomized block design with three replications under non-stress and drought stress conditions i More

        In order to evaluate the effect of water deficit stress (limited irrigation) on different traits of bean. Ten bean genotypes were planted in a randomized block design with three replications under non-stress and drought stress conditions in the Islamic Azad University Arak. The results of stepwise regression are shown that day`s number till the leaves appearance, day`s number till the third leaflet appearance, number of pod per plant, number of seed per plant, 100 weight-seed, stem diameter, plant height, number of nod on main branch, plant fresh weight under non-stress condition and day`s number till the leaves appearance, day`s number till the third leaflet appearance, day`s number till the anthesis, , number of seed per plant, 100 weight-seed, length of Tap root, plant height, length of internod, plant fresh weight and plant dry weight had the most effect on the yield. Factor analysis showed in the normal condition six factors were identified that over 80% of the performance changes are justified and in the stress conditions there are seven factors were identified that over 84% of the performance changes are justified. Geometric Mean Productivity (GMP), Stress Tolerance Index (STI) and Mean Productivity (MP) were the most suitable indicators for selecting drought resistant genotypes. Based on these indicators KS 41225, KS41147 and KS 41231 in White beans, were found as resistant genotypes. Manuscript profile