بررسي آبياري قطره اي T-Tape و باراني از لحاظ عملكرد و كارايي مصرف آب براي دو رقم سيب زميني بورن و ساتينا تحت شرايط مختلف مصرف كود آلي

چكيده انگليسي :

Investigation of yield and water use efficiency of two varieties of potato Burren and satina under trickle T Tape and sprinkler irrigation us ing different organic fertilizers Behnaz Molaei b molaei@ag iut ac ir Date of submission January 2013 Department of Water Engineering College of Agriculture Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Behrouz Mostafazadeh Fard behrouz@cc iut ac ir Mahdi Gheysari Gheysari@cc iut ac ir Abstract Sprinkler and drip T Tape irrigation systems have different water application efficiency and losses effi ciency They also create two different processes of saturated and unsaturated flow in soil matrix and by influencing soil aeration and soil available water for plant cause different water use efficiency Also type of substrate and organic matter in soils are an important factor in improving soil physical condition How ever due to the deficiency of organic matter in soils of arid and semi arid areas of Iran the cost of in creasing organic matter in the soils is very high In this regard some fertilizers ae marketed as an alterna tive or supplement that is necessary to study their efficiency Potato is one of the important food which is widely cultivated in Iran Potato yield is highly dependent on substrate condition and is very sensitive to water stress The aim of this study was to investigate the effect of drip and sprinkler irrigation on yield and water use efficiency of two varieties of potato Burren and Satina in three different substrate condi tions This study was performed in Molaei Agro Industry complex during summer of 1390 Micronutrient and fertilizers recommendations were similar for all of the treatments Time of irrigation was based on soil moisture content For measuring soil moisture in root depth PR2 probe installed in 12 experimental plots and soil moisture depletion were measured daily Before harvesting at the end of plant growth peri od samples were taken from plants Finaly for determining potato yield the yield of total plot area 313 square meters were analyzed Dry matter and starch content of potato were determined in laboratory For the season total volume of water that used for drip irrigation and sprinkler irrigation was 6280 and 7470 m3 ha respectively Staticaly significant differences were found between potato yields due to irrigation for Burren and Satina varieties p 0 05 The maximum potato yield for Burren and Satina varieties in drip irrigation were 25 29 and 24 95 ton ha respectively and the minimum potato yield in sprinkler irriga tion were 16 45 and 17 31 ton ha respectively Drip irrigation by using 16 percent less water than sprin kler irrigation produce 34 and 30 percent increase in potato yield for both varieties of Burren and Satina respectively Significant differences were found between potato yields and substrate for Burren and Satina potato varieties p 0 01 Potato yield for Burren and Satina varieties in OrganiHumme substrate were respectively 29 and 20 percent higher than manure substrate and also 18 5 and 10 percent higher compared to control substrate In studying the interaction effect of irrigation and substrate for Burren and Satina varieties maximum potato yield were found in drip irrigation and OrganiHumme substrate with 26 and 27 ton ha and the lowest yield were found in sprinkler irrigation and manure substrate with 12 96 and 16 2 ton ha The maximum water use efficiency for Burren and Satina potato varieties in drip irrigation were 4 02 and 3 97 kg m3 respectively and the minimum water use efficiency in sprinkler irrigation were 2 19 and 2 3 kg m3 respectively Water use efficiency for Burren and Satina potato varieties in drip irri gation were respectively 83 and 73 percent higher compared to sprinkler irrigation In investigating the effect of substrate on water use efficiency for both Burren and Satina varieties OrganiHumme substrate with 3 53 and 3 45 kg m3 water use efficiency was the highest and the

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بررسي آبياري قطره اي T-Tape و باراني از لحاظ عملكرد و كارايي مصرف آب براي دو رقم سيب زميني بورن و ساتينا تحت شرايط مختلف مصرف كود آلي

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