Calculation of evapotranspiration with a plant coefficient of one and two-component For the corn plant during the growing season

Journal of Water Science & Engineering

دوره 10، شماره 29، بهمن 2020، صفحه 66-55   

نوع مقاله: Original Article

نویسندگان

پیام کمالی^* ؛ سید ابراهیم هاشمی گرمدره

چکیده

Determining the amount of evapotranspiration (plant water requirement) is an important component in determining water balance and irrigation budgeting. The aim of this study was to calculate the evapotranspiration of maize plants with one-component and two-component plant coefficients and compare them. The study area is the educational and research farm of the Agriculture and Natural Resources Campus of the University of Tehran. In this study, plant coefficient was calculated as one-component and two-component for maize during the 100-day growing period. This study was conducted in the educational and research farm of the Campus of Agriculture and Natural Resources, University of Tehran. The results showed that the greatest difference between the one-component and two-component plant coefficients and finally in the evapotranspiration calculated by these two coefficients for the corn plant is in the early stages of growth. Considering that in the two-component plant coefficient, the amount of evaporation in the early stages of growth, when the soil surface is bare, is considered, the total evapotranspiration rate calculated with the two-component plant coefficient (602) is greater than the total evapotranspiration rate Calculated with a one-component plant coefficient (557.5).

کلیدواژه‌ها

evapotranspiration؛ plant coefficient؛ corn؛ Karaj

مراجع

قیصری، م.، میرلطیفی، م.، همایی، م. و اسدی، م. (1384). تعیین نیاز آبی ذرت علوفه‌ای و ضریب گیاهی آن در مراحل مختلف رشد. مجله تحقیقات مهندسی کشاورزی، جلد 7 شماره 26، ص 125-142.

میرزایی، م. و سهرابی، ت. (1385). تعیین ضریب گیاهی در شرایط واقعی برای ذرت و چغندر قند در دشت قزوین و مقایسه آن با روش FAO. پایان نامه کارشناسی ارشد، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران.

وزیری، ژ.، سلامت، ع.، انتصاری، م.، مسچی، م.، حیدری، ن. و دهقانی سانیچ، ح. (1387). تبخیر- تعرق گیاهان (دستورالعمل محاسبه آب مـورد نیـاز گیاهان). کمیته ملی آبیاری و زهکشی ایران، تهران.

Allen, R.G., Pereira, L.S., Raes, D. and Smith, M. (1998). Crop evapotranspiration. Guide lines for computing crop evapotranspiration. FAO Irrigation and Drainage Paper No 56, Rome, Italy.

Mostafazadeh, F.B., Heidarpour, M. and Hashemi, S.E. (2009). Crop coefficients and evapotranspiration for an Ash (Fraxinus rotundifolia) and Cypress (Cupressus arizonica) in an arid region. Australian Journal Science Crop, 3(2), pp: 71-89.

Doorenbos, J. and Pruitt, W.O. (1977). Crop Water Requirements. FAO Irrigation and Drainage Paper, NO. 24, Rome.    

Zare Abyaneh, H., Bayat Varkeshi, M., Ghasemi, A., Marofi, S. and Amiri Chayjan, R. (2011). Determination of water requirement, single and dual crop coefficient of garlic (Allium sativum) in the cold semi-arid climate. AJCS, 5(8), pp:1050-1054.    

Simon, C.M., Ekwue, E.I., Gumbs, F.A. and Narayan, C.V. (1998). Evapotranspiration and crop coefficients of irrigated maize (Zea mays L.) in Trinidad. Tropical Agriculture, 75(3), pp:342-346.