Kajian Kebutuhan Air Irigasi Tanaman Jagung (Zea mays L.) Berdasarkan KP-01 dan Metode Thornthwaite-Mather

Sri Wahyuni(1*), Dwi Rustam Kendarto(2), Nurpilihan Bafdal(3),


(1) Universitasi Padjadjaran
(2) Universitasi Padjadjaran
(3) Universitasi Padjadjaran
(*) Corresponding Author

Abstract


Two different methods for determining irrigation water requirement for corn, is  KP-01 and  Thornthwaite-Mather method. Two Methods have different parameter such as reference crop evapotranspiration (ETo) and effective rainfall. The average ETo value using Penman-Monteith for Thornthwaite-Mather was lower (82,5%) than using Penman Modification method (KP-01) . The ratio of effective rainfall between KP-01 and Thornthwaite-Mather was 33,02%.  Corn water irrigation requirement for a pattern planting based on KP-01 is 806,96 mm, while corn water irrigation requirement based on Thornthwaite-Mather method is 254,4125 mm.  Corn water irrigation requirement using KP-01 is higher than Thornthwaite-Mather because effective rainfall method for KP-01 (using USDA Soil Conservation Service) is lower than rainfall effective for Thornthwaite-Mather.


Keywords


Corn Water Irrigation Requirement, Thornthwaite-Mather Method, KP-01, Rainfall Effective, ETo.

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DOI: http://dx.doi.org/10.31289/agr.v3i2.2590

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