7966

7401

كارشناسي ارشد

علوم باغباني

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1391

سيزده،65ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

نعمت اله اعتمادي، عبدالحسين رضايي نژاد

علي نيكبخت

2/7/92

بهرام باني نسب، محمدحسين اهتمام

مهندسي كشاورزي

ID7401

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Evaluation of Visual Quality and Drought Resistance in Native Festuca ovina of Lorestan Soheila Molavi Moghadam S molavi@ag iut ac ir Junuary 23 2013 Department of Horticultural Science Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Assoc Prof N Etemadi etemadin@cc iut ac ir Assist Prof A Rezainejad Rezaii nejad hossein@gmail com Abstract Water for use in turfgrass irrigation is becoming increasingly limited which often leads to decline in turf quality particularly in semiarid and arid regions Therefore water conservation becomes a prime concern of turfgrass managers and growers This situation is complicated by weather patterns that lead to extreme weather such extended as drought and heat The objective of this investigation was to evaluation of visual quality and draught resistance of native Festuca ovinain Lorestan in the forms of two separate experiment In the first experiment in order to assess the turf quality after establishing and covering the surface of the PVC pots 60 cm deep with turf grass three levels 2 4 and 6 cm were applied in species every week This experiment was done factorial based on completely randomized blocks design and during that shoot growth tillering color leaf width fresh and dry weight were measured every week The result of first experiment showed Festuca ovina despite of less color compared to Poa pratensiswas suitable for turf establishment for such a important variety characteristic as field germination speed sward density re growth after cuts and leaf width 0 59 mm By the way surface of 2 cm is the best height for this species The objective of the second exoeriment was to determine the drought resistance of turfgrasses This experiment was done on the completely randomized blocks design Drought treatment was done with withholding irrigation until leaf wilting of most control plants reach 100 During the stress period shoot growth fresh and dry weight color prolin content chlorophyll content Chl catalase CAT ascorbate peroxidase APX percentage of drying root penetration root fresh and dry weight and effective depth of root density were measured The result of second exoeriment showed that in every two species drought stress caused to decline grass quality Reduction of shoot growth fresh and dry weight in Poa pratensis was greeter than Festuca ovina Festuca ovina was the best for root fresh and dry weight root penetration and depth of root density Prolin content chlorophyll content color catalase and ascorbate peroxidase was the most in Festuca ovina in comparison with control plants at 20d Drying penetration in Festuca ovina was increased with more delayed than Poa The prolonged drought stress decreased APX and CAT activities and increased prolin content and drying penetration in Festuca These results suggested that drought tolerance could be related to increases in antioxidant activities and proline content However prolonged drought stress suppressed APX and CAT activities Key Words Festuca ovina drought stress enzyme proline visual quality PDF created with pdfFactory trial version www pdffactory com

نعمت اله اعتمادي، عبدالحسين رضايي نژاد

علي نيكبخت

بهرام باني نسب، محمدحسين اهتمام