UPM Institutional Repository

Effects of crop evapotranspiration estimation techniques and weather parameters on rice crop water requirement


Citation

Mamodu, Maina Mohammed and Mohd Soom, Mohd Amin and Kamal, Md. Rowshon and Wayayok, Aimrun and Abd Aziz, Samsuzana and Abdullah, Mohd Yazid (2014) Effects of crop evapotranspiration estimation techniques and weather parameters on rice crop water requirement. Australian Journal of Crop Science, 8 (4). pp. 495-501. ISSN 1835-2693; ESSN:1835-2707

Abstract

Accurate estimation of crop evapotranspiration is key to determination of crop water requirements as well as water productivity. In this study, Microflex-C sensors were mounted on three sets of lysimeter to measure crop evapotranspiration in the paddy fields of the Tanjung Karang Rice Irrigation Scheme. Evapotranspiration was obtained from water level recorded at 15 minutes interval for the entire irrigation season. The readings were carried out starting from middle of January to end of April 2012. Measured crop evapotranspiration were compared with estimated evapotranspiration from weather data using penman Monteith method. These evapotranspiration values were used to determine the actual crop water requirement of MR219 rice (Oryza sativa) variety. The lysimeter and weather data estimates showed that 37% and 48% of the total water supplied was enough to meet the actual crop water requirement. Sensor based Microflex-C readings from the lysimeter measurements reveals that less water was required to meet actual crop water requirement compared to estimated methods. The actual average daily crop evapotranspiration for the growing season were 4.1, 3.9 and 4.0 mm/day for the month of February, March and April, respectively. The average water productivity index was determined using the lysimeter reading and weather data were found to be 10.1kg/ha-mm and 7.8kg/ha-mm respectively.


Download File

[img]
Preview
PDF (Abstract)
Effects of crop evapotranspiration estimation techniques and weather parameters on rice crop water requirement.pdf

Download (84kB) | Preview
Official URL or Download Paper: http://www.cropj.com/april2014.html

Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Southern Cross Publishing
Keywords: Evapotranspiration; Rice irrigation; Lysimeter; Crop coefficient; Microflex-C ultrasonic sensor; Telemetry
Depositing User: Nabilah Mustapa
Date Deposited: 06 Aug 2015 08:20
Last Modified: 23 Nov 2016 07:55
URI: http://psasir.upm.edu.my/id/eprint/37344
Statistic Details: View Download Statistic

Actions (login required)

View Item View Item