Vol. 6, Issue 3 (2018)
Comparative study of water requirement with seasonal rainfall for Cereals, pulses and oil seed of Khurda district of Odisha
Author(s): Abinash Dalai, CR Subudhi, Biswajit Dalai and Rati Ranjan Mohanty
Abstract: Water requirement of different crops like cereals and pulses was calculated by considering the data available at Bhubaneswar climatic station and DSS_ET version 4.1 software. 30 years long term daily mean climatic data of minimum and maximum air temperature, mean relative humidity, average wind speed, solar radiation, and rainfall were obtained from the OUAT observatory during 2013-14. The latitude of the study area is from 18046’ to 200 95’ N and longitude of the area is 830 48’ to 870 46’ E and elevation is 42m. Mean annual rainfall is 1408.4 mm and geographical area of the district is 289000 ha. The DSS _ET developed for ET0 estimation includes a model base with decision-making capabilities, a graphical user interface and a database management system. The model base consists of twenty two most commonly used and internationally accepted ET0 estimation methods based on combination theory, radiation, temperature and pan evaporation along with an algorithm based decision-making model. In this study, a trial has been made to determine the water requirement of six major crops of Khurda district. Thirteen well established methods are used to estimate the daily reference evapotranspiration for 30 year period. For each crop, reference evapotranspiration was determined by taking 30 years daily average of ET0 for the crop period. Daily crop water requirement was then calculated by multiplying crop coefficient (Kc), value to the estimated ET0 from FAO 56, PM method. Crop water requirement was estimated for each crop using the result of reference ET0 for the crop period. It was found out that that there was sufficient surplus water available during Kharif but in Rabi crop needed irrigation because rainfall was not regular. For Kharif long duration rice crop, water requirement was highest and for Green gram water requirement was lowest.
Pages: 1377-1381 | 466 Views 57 Downloads
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How to cite this article:
Abinash Dalai, CR Subudhi, Biswajit Dalai, Rati Ranjan Mohanty. Comparative study of water requirement with seasonal rainfall for Cereals, pulses and oil seed of Khurda district of Odisha. Int J Chem Stud 2018;6(3):1377-1381.
