3259

3168

كارشناسي ارشد

﴿ آبياري و زهكشي ﴾

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1384

چهارده، 121، [II]ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

جهانگير عابدي كوپائي

سيد فرهاد موسوي، قدرت الله سعيدي

حسين افضلي مهر، علي اكبر رامين

1396/02/31

كتابنامه

كشاورزي

مهندسي كشاورزي

ID3168

به فارسي و انگليسي : قابل رويت در نسخه ديجيتالي

Abstract The use of alternative water holding amendments will become moreimportant over time especially in regions with reduced water availability Superabsorbent materials may have great potential in restoration andreclamation projects where opportunity for irrigation is limited and thus storingmore water available for plant establishment is critical Superabsorbent materialscan be generally classified as synthetic polyacrylamides and natural zeolites Superabsorbent materials absorb and store water hundreds of times their ownweight Water held in the expanded amendments is intended as a soil reservoirfor maximizing the efficiency of plant water uptake The objectives of this studywere to evaluate the effect of superabsorbent materials on the growth indices oftwo ornamental plants Cupressus arizonica and Ligustrum under reducedirrigation regimes in a field trial and the effect of superabsorbent materials onsoil water retention curve WRC in a laboratory trial The RETC computerprogram was used for obtaining optimal model parameters A new type ofsuperabsorbent polymer Superab A200 and two types of zeolites Firozkoh andSemnan in two levels 4 and 6 g kg was mixed with two soil textures of clayand sandy loam The results of the soil water retention model showed that superabsorbent materials caused the residual water content r and saturatedwater content s to increase Air entry value hb was observed to decrease inthe clay and increase in the sandy loam The results of the statistical analysisshowed that there is significant difference between samples containingsuperabsorbent materials and the control and between the levels of application The field trials were as split plot in the random complete blocks model in whichthe main factor was two irrigation regimes consisting 33 and 66 evapotranpiration ETc The minor factor included six different componentswith adding 4 and 6 g kg hyrogel Firozkoh and Semnan zeolite to the soil Thecontrol blocks had no amendment and irrigated with 100 ETc The resultsindicated that the growth indices are the same in treatment containing 4 and 6g kg hydrogel and receiving irrigation water 66 ETc with the control Thus application of 4 and 6 g kg hydrogel reduced the required water 1 3 of thecontrol for both plants However application of 4 and 6 g kg Firozkoh andSemnan zeolites reduced the required water 1 3 of the control only forCupressus arizonica Sunflower method indicated a considerable increase in thetime required to reach permanent wilting point PWP Samples containing 6g kg polymer had the maximum period to reach PWP 22 days compared to thecontrol samples 12 days 1

جهانگير عابدي كوپائي

سيد فرهاد موسوي، قدرت الله سعيدي

حسين افضلي مهر، علي اكبر رامين