5632

5266

كارشناسي ارشد

آبياري و زهكشي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده كشاورزي

1389

نه،124ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

سعيد اسلاميان، جهانگير عابدي كوپايي

مهدي قيصري، حسين سقائيان نژاد

10/11/89

بهروز مصطفي زاده، خورشيد رزمجو

مهندسي كشاورزي

ID5266

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Assessing Different Strategy Managements in Maize and Wheat Productivity and Climate Simulation Using DSSAT Software Package in Isfahan Seyyed Amin Mostafavi a mostafavi@ag iut ac ir Date of Submission October 24 2010 Department of Water Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Saeid Eslamian eslamian@ndrd org saeid@cc iut ac ir Jahangir Abedi Koupai koupai@cc iut ac ir Abstract Increasing demand for agricultural products has led to pressure on water resources soil and other natural resources Field experiments are time consuming and very expensive and produce of new data through traditional methods are not sufficient and their results are limited to their location In recent decades models are a useful tool for human in this field Decision Support System DSS by the International Organization of Cooperation IBSNAT for transfer of agricultural technology have been developed In this study we evaluated different planting strategies in wheat and maize for current and future climate conditions at Isfahan using DSSAT software Five planting date five soil texture eight different management of allowable deficit from 10 to 80 percent and application of urea for 0 700 kilograms per hectare were selected For planting maize irrigation and fertilization were automatically According to the index of productivity of water the amount of 288 kg N ha and maximum allowable deficiency MAD 30 was selected The simulation was done for wheat planting date from the seventh of October Mehr to the fist of December Azar According to the index of water productivity the twenties and third October Aban was the proper planting date 110 kg urea ha was optimum amount of fertilization and MAD was 60 Planting date for wheat and maize simulated at Daran station for 1990 1999 as the base period Temperature and precipitation were generated using the HadCM3 model under scenario A2 and B2 for the Daran station to the end of 21th century Based on A2 and B2 scenario air temperature will be increased by 2 7 and 2 4 degrees Celsius and rainfall will be reduced 6 2 and 8 3 percent Growth simulation of wheat and corn were done for three period of 2010 2039 2040 2069 and 2070 2099 like base period In both scenarios increase in temperature decreased the growing period of corn and yield and reduced water consumption As a result the water productivity index will be reduced The water productivity in the B2 scenario was less than the A2 scenario It is recommended to compensate the water productivity of maize the planting date should be changed from the early of May Khordad to the early of June Tir at the end of the current century increase in temperature and precipitation led to reduce crop growth period but the yield remains stable and water will decrease as a result the water productivity will increase Effect of climate change on wheat cultivar of Ghods is assessed as positive but corn growth is limited and productivity of irrigation water will reduce dramatically Keywords DSSAT climate change irrigation water productivity threshold

سعيد اسلاميان، جهانگير عابدي كوپايي

مهدي قيصري، حسين سقائيان نژاد

بهروز مصطفي زاده، خورشيد رزمجو