بررسی دقت مدل AquaCrop در شبیه‌سازی عملکرد و بهره‌وری مصرف آب ذرت دانه‌ای در تراکم‌های کاشت متفاوت و مقادیر مختلف آب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد آبیاری و زهکشی، گروه علوم و مهندسی آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

2 استادیار، گروه علوم و مهندسی آب، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران

3 استادیار پژوهش، مؤسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران

10.22034/jewe.2020.247901.1419

چکیده

اهمیت گیاه ذرت سبب کشت گسترده رقم‌های مختلف این گیاه زراعی در بسیاری از مناطق ایران شده است. از آن­جایی‌که بررسی عوامل محیطی و مدیریتی نظیر تراکم کاشت، مقدار آبیاری و رقم گیاه بر روی عملکرد دانه، زیست‌توده و بهره‌وری مصرف آب گیاهان زراعی نیازمند آزمایش‌های مزرعه‌ای هزینه‌بر و زمان‌بر می‌باشد، به­نظر می‌رسد می­توان اثر عوامل مختلف بر عملکرد این گیاه زراعی به­وسیله مدل‌های گیاهی را شبیه‌سازی کرد. پژوهش حاضر به‌منظور ارزیابی مدل گیاهی AquaCrop برای دو رقم ذرت دانه‌ای رقم‌ متوسط­رس SC500 و زودرس SC302 تحت تراکم‌های کشت 75000، 85000 و plant/ha 95000 در رقم SC500 و 80000، 90000 و plant/ha 100000 در رقم SC302 با مقادیر مختلف آبیاری 75، 100 و 125٪ آبیاری انجام شد. نتایج نشان داد که مدل AquaCrop در شبیه‌سازی عملکرد دانه و بهره‌وری مصرف آب ذرت از دقت مطلوب (RSME: ton/ha 89/0 و NRSME: 10/0) و کارایی مناسبی (EF و d =99/0) برخوردار بود. در شبیه‌سازی زیست‌توده ذرت نیز این مدل گیاهی دقت قابل‌قبول (= RSME ton/ha 47/2 و NRSME =14/0) و کارایی مناسبی (= EF 98/0 و = d 99/0) داشت. مدل AquaCrop در شبیه‌سازی بهره‌وری مصرف آب ذرت نیز دقت (= RSME kg/m3 07/0 و = NRSME 07/0) و کارایی (EF و = d 99/0) مناسبی داشت. بر اساس این نتایج، مدل AquaCrop برای شبیه‌سازی ارقام ذرت تحت شرایط ذکرشده پیشنهاد می‌شود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Assessing Aquacrop Model Accuracy for Simulation of Corn Yield and Water Use Efficiency in Different Plant Densities and Water Amount

نویسندگان [English]

  • Shokooh Karimi 1
  • Aslan Egdernezhad 2
  • Mohammad Mehdi Nakhjavanimoghaddam 3
1 M.Tech. Student, Department of Water Sciences and Engineering, Faculty of Agriculture and Natural Resources, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 Assist. Professor, Department of Water Sciences and Engineering, Faculty of Agriculture and Natural Resources, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
3 Assist. Professor, Agricultural Engineering Research Institute (AERI), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
چکیده [English]

The importance of the corn plant has led to the widespread cultivation of different cultivars of this crop in many parts of Iran. Since the study of environmental and managerial factors such as planting density, irrigation amount and plant cultivar on grain yield, biomass and water use efficiency of crops requires costly and time-consuming field experiments, it seems that the effect of various factors on the crop yield can be stimulated using plant models. The present study was performed to evaluate the AquaCrop plant model for two maize cultivars,  mid cultivar SC500 and early cultivar SC302, under 75000, 85000 and 95000 and 80000, 90000 and 100000 plant/ha densities, respectively, with different irrigation values of 75, 100 and 125%. The results showed that the AquaCrop model had good accuracy (RSME = 0.89 ton/ha and NRSME = 0.10) in simulating grain yield and maize water use efficiency (EF and d = 0.99). In simulation of corn biomass, this plant model had acceptable accuracy (RSME = 2.47 ton/haand NRSME: = 0.14) and good performance (EF = 0.98 and d = 0.99). AquaCrop model also had good accuracy (RSME = 0.07 kg/m3 and NRSME = 0.07) and efficiency (EF and d = 0.99) in simulating corn water use efficiency. Based on these results, the AquaCrop model is proposed to simulate corn cultivars under the mentioned conditions..

کلیدواژه‌ها [English]

  • crop growth model
  • Early Cultivar
  • Mid Cultivar
  • Production Function
  • Water-driven Model
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